3d System and 3d Printing Essay Example for Free

3d System and 3d Printing Essay As a radical innovation, 3D printing has been introduced to market over 30 years since 1980s. This technology revolution doesn’t only change the process of molding; it also adapts its industry to go green by reducing wasting materials. In the contrast, object is produced by traditional technology (subtractive process) generates surplus cut material. In the early period of development, it was applied in hobbyist uses and industry uses such as design visualization, prototyping, architecture, education, and healthcare. In 2000s, along with mass launches of portable 3D printers from several companies, 3D printer has stepped on consumer product market; also, printed objects have been transformed from components or prototypes to finished goods. The personal 3D printer is incremental innovation of 3D printing. Basically, it was developed from industry 3D printer by design, size, and accessibility. Cube ® as 3D Systems’ first personal 3D printer is part of company’s strategy which is to accelerate 3D printer penetration. Five growth strategies See more: Homeless satire essay * Expand on-demand-parts services * Accelerate 3D printer penetration * Grow healthcare revenue * Consumer and retail * Create Seamless digital scan, design and print platform 3D Systems acquired Rapidform which is a leading global provider of 3D scan-to CAD and inspection software tools, located in Seoul, South Korea in 9 October 2012. 3D Systems is going to achieve its fifth growth initiative: to create a seamless, digital scan, design and print platform for the benefit of its customers. 3D Systems would broaden their range of capabilities with complementary products and technology, and extend its coverage and breadth globally with a significant foothold in South Korea and Japan. Technological Opportunities and Innovation The company has been playing as a leading provider in 3D printing business for over 25 years. It mainly focuses on business purposes e.g. making a rapid prototyping and manufacturing part. The research and development team of the company work closely with marketing department and foresee an opportunity gap in the current market. The team has an idea to entering into â€Å"home personal 3D printing† market by launching a new product line called Cube ® which allows people to print real object in three dimensions. Concurrent with introducing Cubify.com as a marketplace and meeting place where artists, designers, children and makers can sell their 3D designs and anyone can Cube ® in Product Life Cycle According to Product Life Cycle strategy, 3D Systems and its Cube ® have been successfully proving the Introduction stage and are ongoing with Growth stage. The attention has been captured by hyping up the publicity and put the personal home 3D printing into recognition. All sources of public media e.g. Magazine, Newspaper, YouTube, News, Trade Event are widely presenting the debut of company innovation of home personal 3D printer and has been awarded as the winner of â€Å"Popular Mechanics Breakthrough Award 2012†. 3D Systems Focusing Strategies In order to move along from Introduction period to Growth, the company has put its focus into 4 main company strategies which one of them is â€Å"Accelerate 3D printer penetration†. It is emphasis on expanding company distribution channel through reseller and subsidiary around the world which currently the company only offers click-and-mortar store. Cube ® in Adoption Curve and its Development Culture Since the personal home 3D printer is new to market, with its intuitive experience offering to consumer, it is not difficult for Innovators group of people to adopt the printing technology. Therefore, with its product features—Simplicity of Plug and Play, WiFi printing support, and more pattern available to download on cubify.com, it would not be an obscurity for Early Adopters to adopt the system as well. Furthermore, Cube ® 3D printer is currently likely positioned on the upper right side of the 3D Systems’ Development Culture model where it is considered to be such a completely new and breakthrough product of the year. The company will constantly improve the printer itself as seen in the company annual report under research and development expenses increased by $5.7 million, or 58.1%, to $15.4 million in the first nine months of 2012 from $9.7 million in the first nine months of 2011 3D Systems Development Culture Cube ® and its complementary product The selling point of the Cube ® 3D printer is not only the machine itself but the company also offer a cloud service community—Cubify.com. - Cubify turns mobile device, PC or tablet into a powerful mobile digital canvas to unleash creativity and bring ideas to life in 3D. On Cubify.com, user can find coloring book, cloud gaming and share creativity in 3D experience. The site also offers intuitive 3D Apps, rich 3D printable content libraries of games, puzzles, and any other collections for creation, purchase, share, or even sell for money. Additionally, the website also provides online printing service and has the printed object ship it right to customer later by air mail. Therefore, this service has driven the company to hold competitive advantage over competitors. People are increasing the awareness of cloud service where everything can be done over the air. The company can create the value of its product by offering a place where community begins which increasing in customer lock-in strategy and generate more revenue to company in long run. What company strategies beyond launch Cube ®: Be fast mover The world’s first personal 3D printer was launched by Stratasys in 2009. At the same time, 3D systems also launched its first personal 3D printer to become one of fast movers to better understand the barriers to broad utilization. As technology world, time is everything. 3D systems entered the market early means to quickly build large installed based as many as its industry section, and keep its leading position in 3D printing technology. They are now working on a multi-front strategy to democratize access and accelerate the adoption of 3D printing for the student, the hobbyist and ultimately, the consumer. The real keys are utility and affordability. Cube is part of its plan. Razor-blade strategy The launch of Cube reflects company’s penetration strategy that attempts to make customers to lock in with its products. The price of Cube is affordable, in addition to its high quality of product and service such as friendly-use application, various materials and colors, platform named Cubify.com where users can download and upload sources. Printer won’t be only product customer will purchase. Once printer is purchased, customer needs to keep purchasing other complementary products such as materials, also service such as applications. They will continuously make profit for company; even the revenue of materials and service is greater than the revenue of machine. RD As a technology company, innovation is critical, and one of the key drives of innovation is research and development. 3D systems’ expense in RD is increasing gradually to ensure its leadership through technology and business innovation. Table: 1. 3Dsystems-2012 Financial Statement Protect innovation Only developing and introducing new technology and product that will meet the customers need is not sufficient to be successful. To gain profit and increase market share, the company need to protect the product and service and development and manufacturing phase copying by competitors and new entrants. 3D Systems consider their technology platforms and materials as proprietary and try to protect them through copyrights, patents, trademarks and trade secrets. 3D Systems has worked steadily over the years to develop the market, protect its position with a portfolio of hundreds of patents, and to improve its machinery, software and materials. This has resulted in improvements in accuracy, surface finish and material properties that have been instrumental in expanding the rapid prototyping market as a whole. At December 31, 2011, 3D Systems held 725 patents and 257 pending patent applications worldwide, including applications covering inventions contained in our recently introduced printers. 3D Systems has also entered into licensing or cross-licensing arrangements with various companies in the United States and in other countries that enable those companies to utilize the technologies in their products or that enable 3D Systems to use their technologies in the products. Under certain of these licenses, they are entitled to receive, or obligated to pay, royalties for the sale of licensed products in the U.S. or in other countries. 3D Systems gain the competitive advantages from these patents and licenses and their success depends largely on the marketing, business development and applications know-how and on their ongoing research and development efforts. Although 3D Systems protect their intellectual property rights, the secrecy of their digital content, confidential information, trade secrets and unlicensed copying through a variety of techniques, the success of 3D Systems will motivate the competitors to copy what they are doing. When the competitors come with up with the technology and product with the same customer need, it will be harmful to their business. The loss of trade secret protection could make it easier for third parties to compete with their products by copying previously confidential features, which could adversely affect 3D Systems revenue and operating margins. Strategic acquisition 3D Systems has made and will continue to make strategic acquisitions in future also. 3D has acquired a number of technologies and competitor companies over the years. It purchased Keltool ® technology from 3M several years ago to address high volume injection mold-making applications. In rapid succession in 2001, it acquired OptoForm SARL (France), RPC Ltd. OptoForms technology was aimed at additive manufacturing applications and RPC was acquired to help the company replace its long-term relationship with resin supplier Vantico. 3D Systems completed twelve acquisitions in 2011 and the Z Corp and Vidar acquisitions in 2012. 3D Systems consolidated its entire personal and professional 3D printer businesses into a single unit. This acquisition integrates Z Corp and Vidar products and services with 3D Systems’ extensive portfolio, uniquely positioning 3D Systems for accelerated growth in the dynamic, rapidly expanding 3D content-to-print space. The transaction completes 3D Systems’ range of product capabilities, fills price gaps with complementary products and technology and doubles its reseller coverage globally. Z Corporation Z Corp provides 3D technologies used to create new products and services more effectively than any other ways, compressing the design cycle, generating new concepts, communicating clearly, fostering collaboration, and reducing errors. Z Corp solutions span the entire 3D CAD/BIM design process from concept through design verification. Z Corp is committed to making their solutions the fastest, easiest, most accessible and most valuable. Vidar Systems Corporation Vidar Systems is a leading provider of optical imaging technology specializing in medical and dental imaging markets. Built upon a solid foundation of innovation and an unwavering dedication to quality, the company is the worldwide leader and number one manufacturer of medical film digitizers. â€Å"This is a historic, game-changing event for our customers and stockholders. Today we gained complementary full color and high speed printing technology, increased our marketplace presence significantly in verticals beyond product development and direct manufacturing, assembled the largest and most-well prepared reseller channel in 3D printing, and catalyzed our healthcare solutions business,† said Abe Reichental, President and CEO of 3D Systems. â€Å"Concurrent with the completion of this transaction today, we have taken immediate, decisive steps to unleash the combined revenue growth potential and deliver the value creation inherent in this acquisition for the benefit of customers and shareholders alike.† 3D Systems plan to evaluate acquisition opportunities in the future in an effort to expand the business and enhance stockholder value. â€Å"Acquisitions involve certain risks and uncertainties including: * Difficulty in integrating newly acquired businesses and operations in an efficient and cost-effective manner, which may also impact our ability to realize the potential benefits associated with the acquisition; * The risk that significant unanticipated costs or other problems associated with integration may be encountered; * The challenges in achieving strategic objectives, cost savings and other anticipated benefits; * The risk that our marketplaces do not evolve as anticipated and that the technologies acquired do not prove to be those needed to be successful in the marketplaces that we serve; * The risk that we assume significant liabilities that exceed the limitations of any applicable indemnification provisions or the financial resources of any indemnifying party; * The inability to maintain a relationship with key customers, vendors and other business partners of the acquired business. Acquisition for the development of Cube * 3D Systems acquired Bit from Bytes (UK) which is one of the more successful of start-up companies producing open-source equipment in 2010. Both companies achieved from this acquisition. BFB has got the patent and technical issues as well as means to accelerate the pace of its development. It also provided 3D Systems with a window on very low price and easier to enter in cost sensitive fields such as education. In 2011, 3D followed up that acquisition and purchased BotMill, an even smaller US company producing RepRap derivative and the purchase of widen their offerings for those customers looking for machine at the lowest cost. At the start of the 2012, 3D introduced a third major initiative in the low cost, the Cube 3D printer presented as a key component in a new web-based consumer community the company has dubbed Cubifyâ„ ¢. It remains to be seen how 3D Systems will integrate these efforts, or whether the entities will maintain their individual identities. What benefits and risks of 3D systems in the future? Enjoy benefits 3D systems make mass targets by providing wide range of product portfolio in perspective of price and performance. In the meantime, its 7 print engines are technical standard in 3D printing industries. It means it can capture the majority of customers. Cube is a good trial to penetrate 3D printer to personal use. In addition, effective adoption of emerged new technology and booming market would urge 3D systems to gain large market share and profits while building its leadership. The powerful materials and services can diversify the revenue generation of the company; they build its competitiveness among market. Potential risks: Global economic, political and social conditions might increase costs, harm the ability of company to do business, change the market trend. Cube is still not dominant design yet; the competitors can easily take over its market position by launching higher performance machine with lower price. The company may incur substantial costs enforcing or acquiring intellectual property rights and defending against third party claims as a result of litigation or other proceedings. In some case, it may not be able to protect them from unauthorized copying, use or disclosure. In rapid changing technology world, it will be always possible that radically new technology emerges and destroy current one. If so, the company and its product will face huge difficulty. Recommendations: To gain greater market share with higher profit, we suggest 3D systems to improve in the following aspects: 1. Price 3D Systems could further reduce price of 3D printers to penetrate into market. If do so, company can build large installed base. Over time, when company gains sufficient user, it could start to reduce price of materials to follow penetration plan. On the other hand, it’s to ease users’ concern, and lift company’s reputation. 2. Product development 3D Systems should bring more advanced products with higher specifications to fulfill diversity of printing requirements. Printing product size, types of materials and level of printing details are main specifications customers care. Therefore product developments in general are to make bigger product size, more types of materials, and higher level of details. 3. Service The complexity of use and lack of 3D creations are key barriers of purchase. In order to ease use experience, we suggest 3D systems to develop a new application itself or gain it from acquisition. The application is complementary product which can convert 2D images into 3D creations. Of course, company might face copyright problems. In this case, it can communicate with a group of giant companies to sign a contract to gain information such as size, material, and color of their products. Certainly, the copyright problems will be solved. This service is not free to customers; they need to pay to download. Those giant companies will also gain big percentage of fee from download. [ 1 ]. 3DSystems2012 – NYSE Investor Presentation [ 2 ]. http://finance.yahoo.com/news/3d-systems-cube-r-wins-135242928.html [ 3 ]. 3DSystems2012 – Form10-Q [ 4 ]. http://cubify.com/cube/index.aspx [ 5 ]. 3DSystems2012 – Form10-Q [ 6 ]. 3DSystems2012 – NYSE Investor Presentation [ 7 ]. http://cubify.com [ 8 ]. http://www.thisweekbangalore.com/issue141/news10-Statasys.html [ 9 ]. http://investor.3dsystems.com/content/financial-reports, http://www.3dsystems.com/personal-3d-printers/ [ 10 ]. http://investor.3dsystems.com/content/financial-reports [ 11 ]. 3Dsystems-2012-form-10-Q.pdf [ 12 ]. 3D system 2011 Annual report on Form 10-K [ 13 ]. 3D system 2011 Annual report on Form 10-K [ 14 ]. 3D system 2011 Annual report on Form 10-K 16 http://investor.3dsystems.com/content/financial-reports [ 15 ]. http://investor.3dsystems.com/content/financial-reports

Graduation Speech :: Graduation Speech, Commencement Address

As we sit here this evening, knowing not what lies ahead, but feeling satisfied that we have completed this challenge, we start to wonder. What have we gained from these last 13 years of school? How often have we asked ourselves: Why do we attend school? What do we expect to accomplish? And what do we gain? Questions, whose importance we may not fully understand today, but which have drastically molded our futures. Sure, this path hasn't been the easiest to follow, but we navigated through the complications and tribulations to the point we are at now, and I ask once again, what have we gained? Education has supplied us with a commonality, a basic foundation on which we may establish our ideas. These ideas are the essential elements that dominate our lives. Each is unique and special. But just like it is perplexing to communicate without understanding the other person, it is difficult to express ideas without an education. Today, let us give thanks to all those who have helped us along the way: our parents for their love and support, our teachers for their dedication and encouragement, and to our fellow classmates for their friendship and compassion. In this stage of life we are still discovering ourselves and the world around us. Our experiences are lacking and our world varies tremendously from our parents' and grandparents' generations. We are still struggling for meaning and purpose. As we continue to grow and develop, our understanding will blossom and our convictions will strengthen. Because of our technology, our generation can communicate world-wide. As we continue to strive for greater opportunities and a better life, we must resist being consumed by our own inventions and instead aspire to personally interact with the outside world. The Internet and other modes of communication can only provide a window, a seat in the theater of life. The world is a stage and we are the actors -- the performers that touch the lives of our children -- the innovators of this conventional realm. Technology can only perform the tasks we program into it; accomplishment requires a human being. Striving for knowledge and perfection is admirabl e, but have the courage to maintain your personal identity. Put your emphasis on the qualities that define our individual personalities and contribute to our diversity. So, what have we gained? These last 13 years of school have prepared us for the journey we are about to embark upon.

Hardness Tests And Charpy Impact Test

TITLE Hardness Tests And Charpy Impact Test OBJECTIVE 1. To compare the hardness of the carbon steel, mild steel and ASSAB steel using three different hardness tests, which are Vickers Hardness Test, Rockwell Hardness Test and Brinell Hardness Test. 2. To study the hardness of mild steel, carbon steel and ASSAB which is an important in engineering to design structures or components that related in mechanical properties 3. To determine the resistance of carbon steel and mild steel against sudden impact by Charpy Impact Test. INTRODUCTION Hardness is a measure of a material’s resistance to localized plastic deformation.It also is one of the important properties to be considered. Mechanical properties of metals are a vital of engineering to design the components which using predetermined materials such that unacceptable levels of deformation and failure will not occur. Hardness is a resistance of properties of material to permanent (plastic) deformation caused by steel ball or py ramid-shape diamond when it is pressed onto its surface. There will be three basic method of Hardness Test that will be carried out on carbon and metal: (a) Vickers Test (b) Rockwell Test (c) Brinell Test THEORY 1. Vickers TestVHN = Applied load / Surface area of depression = = 1. 854 P/ d2 (approximate) Where P = applied load (kgf) d = (d1+ d2) / 2 (mm) 2. Rockwell Test HRC = 100 – d /0. 002 HRB = 130 – d /0. 002 Where d = depth of the indentation 3. Brinell Test BHN = Applied force / curve area of indentation P / D/2 [D – (D? – d? )] = P / Dh WhereP = applied load (kgf) D = diameter of steel ball (mm) d = diameter of resulting indentation (mm) h = depth of indentation (mm) = ? [D – (D? – d? )] APPARATUS 1. Set of Vickers Hardness Test Machine . Set of Rockwell Hardness Test Machine 3. Set of Brinell Hardness Test Machine SPECIMENS Mild steel, carbon steel and ASSAB steel A) VICKERS HARDNESS TEST From this method square shape pyramid diamon d 136 ° was press to surface of metal using some load (5kgf until 120kgf) under certain time (15 sec) and lastly the load will release. Square shape corner on the metal surface will be used. To obtain the value of hardness, Vickers Hardness Number (VHN) is calculated as below: VHN=Mass of the loadSurface area of depression =2PSin136 °2d2 =1. 854Fd2approximately Where, P=applied forcekgf d=d1+d22B) ROCKWELL HARDENESS TEST This method has 2 main scales which are: a) Scale B, concavity is a steel ball (1. 58 mm? ) and load using is 100 kgf. b) Scale C, concavity is a cone diamond having corner 120 ° and load is 150 kgf. Rockwell hardness (HR) can be calculated as equation below: HRC=100-d0. 002 HRB=130-d0. 002 Where d=concavity C) BRINELL HARDNESS TEST From brinell hardness test, the harden steel ball has good diameter, D under the load and certain time will be use to get diameter concavity effect,d. BHN=LoadArea of concavity =PD2D2-d2 =P? Dh Where, P=loadkgf D=diameter of the st eel ballmm =diameter concavity effectmm H=internal concavity effectmm =12D-D2-d2 PROCEDURE a) Vickers Hardness Test 1. The specimen (Mild Steel) is put on the anvil of the Vickers hardness machine precisely. 2. The sample is focused until the lines on the surface of the sample can be observed clearly. 3. The focal lens of the microscope is turned to the indenter. 4. The indenter is then pressed into the sample. 5. The test force is maintained for a specific dwell time of about 15 seconds. 6. The indenter is removed when the dwell time is complete. 7. The square shape is appears on the surface of the sample. . The indenter is then turned back to the focal lens. 9. The size of the indent is determined by measuring the two diagonals of the square indent. 10. Step 1 to 9 is repeated for five times by using the same sample but at different part of the sample. 11. Step 1 to 10 is then repeated by using different sample, which is carbon steel. 12. All the readings taken are recorded in a t able. b) Rockwell Hardness Test 1. The sample of ASSAB steel is placed exactly on the anvil. 2. The anvil is wound slowly until the LED begins moving to ‘SET’ and the test is started automatically. 3.The indenter moves down into the position of the part surface of the sample. 4. The load is then applied on the sample for a specific dwell time of 15 seconds. 5. The readings taken are recorded from the indenter machine. 6. Step 1 to 5 is repeated for five times by using the same sample but at different part of the sample. 7. Step 1 to 6 is then repeated by using different sample of carbon steel. 8. All the readings taken are recorded in a table. c) Brinell Hardness Test 1. The sample of mild steel is placed accurately on the anvil. 2. The anvil is wound slowly until the edge of the indenter touches the surface of the specimen. . A handle on the right side of the testing machine is lifted slowly until the gauge shows 1000kgf. 4. The indenter is pressed on the sample by an accurately controlled force for about 15 seconds of dwell time. 5. The indenter is removed slowly after 15 seconds, leaving a round indent in the sample. 6. The diameter of the indent is taken by measuring two diagonals of the round indent by using a portable microscope. 7. Step 1 to 6 is repeated for two times for the same sample but at different portion of the sample. 8. Step 1 to 7 is repeated for another sample of carbon steel. RESULT VICKERS HARDNESS TESTMild Steel Mild Steel| Reading| Diameter,D1( µm)| Diameter,D2( µm)| Average( µm)| VHN| 1| 409. 0| 409. 8| 409. 4| 111| 2| 395. 2| 395. 2| 395. 2| 119| 3| 402. 5| 404. 2| 403. 35| 114| 4| 401. 1| 402. 3| 401. 7| 115| 5| 371. 7| 364. 3| 368. 0| 137| Average| 119. 2| Carbon Steel| Reading| Diameter,D1( µm)| Diameter,D2( µm)| Average( µm)| VHN| 1| 282. 4| 368. 1| 325. 25| 245| 2| 271. 2| 269. 0| 270. 10| 254| 3| 292. 6| 291. 0| 291. 80| 218| 4| 313. 5| 306. 2| 309. 85| 195| 5| 293. 4| 292. 6| 293. 00| 216| Average| 225. 6| ROCKWELL HARDENSS TEST Carbon Steel Reading| HRC| HV| 1| 24. 9| 265. 4| 2| 27. | 280. 4| 3| 27. 0| 279. 0| 4| 28. 3| 288. 4| 5| 28. 2| 287. 6| Average | 27. 12| 280. 16| ASSAB Steel Reading| HRC| HV| 1| 56. 9| 631. 0| 2| 57. 5| 643. 0| 3| 57. 4| 641. 0| Average | 57. 27| 638. 33| BRINELL HARDNESS TEST Mild Steel Reading| Diameter ,d(mm)| BHN| 1| 3. 5| 101| 2| 3. 6| 95| 3| 3. 5| 101| Average| 3. 53| 99| Carbon Steel Reading| Diameter ,d(mm)| BHN| 1| 2. 75| 165| 2| 2. 5| 200| 3| 2. 7| 271| Average| 2. 65| 212| DISCUSSION a) Vickers Hardness Test 1. From this experiment, we can conclude that the higher the Vickers Hardness Number (VHN) of a specimen, the harder the specimen is.We had being tested two specimen which is Carbon steel and Mild steel for Vickers hardness Test. Carbon steel has an average VHN of 225. 6 while the mild steel has an average VHN of 119. 2. This means that carbon steel is harder compared to mild steel. 2. The carbon steel is harder than mild steel because the re is a presence of carbon atoms within the atoms of the structure. When the external force is applied, the carbon atoms prevent the atoms in the structure into sliding over and slipping. b) Rockwell Hardness Test 1. From the Rockwell hardness test, we can conclude that the higher the HRC number of a specimen, the harder the specimen is. . ASSAB steel is a type of alloy steel and thus its composition is much different than that of carbon steel, causing it to possess higher hardness compared to carbon steel. 3. From the result obtained, ASSAB steel has an average HRC number of 57. 27 where as carbon steel has an average HRC number of 27. 12. This mean that AASAB steel is harder compared to the high quality carbon steel. c) Brinell Hardness Test 1. For two specimens which carbon steel and mild steel is being tested with brinell hardness test. The BHN values are obtained. The values are depends on the diameter of the indentation caused. 2.We can conclude that the higher the value of th e BHN, the harder the specimen is. 3. From the results, carbon steel has an average BHN of 212 while mild steel only as an average BHN of 99. This confirms that carbon steel is harder than mild steel. 4. Furthermore, the values of BHN obtained might be not accurate because of the limitation that caused human errors. It is difficult for the observer to note the exact diameter of the indentation through the microscope. CONCLUSION In conclusion, from the results we obtained, it is conclude that ASSAB steel is the hardest material, followed by carbon steel and then mild steel.The hardness of the steel is mainly affected by its composition and percentage of carbon. Carbon steel is absorbed energy is lower than the mild steel. Carbon steel is a brittle material compared to mild steel because of the higher percentage of carbon present in the steel. Thus, fractures almost immediately upon sudden impact. 2. Charpy impact test INTRODUCTION The Charpy Impact Test is the most commonly used test to determine material’s resistance to the impact or sudden fracture where a sharp stress raiser is present.Toughness is a measure of the ability of a material to absorb energy up of fracture. For dynamic (high strain rate) loading conditions and when a notch is present, notch toughness is assessed by using an impact test. Material that experiences very little or no plastic deformation upon fracture is termed brittle whereas material that experiences great deformation upon fracture is termed ductile. The fracture surfaces for brittle material, which has low-energy impact failure, are generally smooth, and in metals have a crystalline appearance.But for ductile material which has high energy fracture, has regions of shear where the fracture surface is inclined about 45o to the tensile stress, and they have in general a rougher, more highly appearance, called fibrous fracture. THEORY 45? 2 mm 45 mm 10 mm 30? Figure 1 45? 2 mm 45 mm 10 mm 30? Figure 1 In Charpy impact test, the specimen are arrange as shown in the above picture and every specimen is prepare will has a notch at the centre of the specimen and the hammer will clout at the region of the notch i. e. stress concentration point.The hammer is release from a specific high which the initial energy having by the hammer is 300J. The scale will show the energy absorbs by each specimen after the experiment and it is recorded. APPARATUS Charpy testing machine SPECIMENS Mild steel and carbon steel PROCEDURE 1. Mild steel and Carbon steel is used in this test. 2. The load was applied as an impact blow from a weighted pendulum hammer that was released from a cocked position at a fixed height. 3. The specimen was positioned at the base of the machine. 4.Upon release, a knife-edge mounted on the pendulum strikes and fractures the specimen at the notch, which acts as a point of stress concentration for this high velocity impact blow. 5. After the weighted pendulum hammer has swung to its original position, the specimen was removed from the vice and its fracture surface was observed. RESULT Specimen| Energy Absorbed / J| Mild Steel| 299| Carbon Steel| 30| DISCUSSION 1. In this experiment, we can see that the energy absorbed by mild steel (299J) is higher compared to the energy absorbed by carbon steel (30J).This shows that carbon steel is a more brittle material and mild steel is a more ductile material. 2. According to the result which energy absorbed by mild steel is higher and it is more ductile. In addition, carbon steel is a brittle due to presence of the carbon atoms in steel. The presence of these carbon atoms provide resistance for plastic deformation to occur by preventing atoms in the steel to slip and slide over each other. The high percentage of carbon atoms reduces the ability of the steel to absorb energy upon impact. 3.As we observe the experiment that we had done in lab, the carbon steel breaks almost immediately when subjected to sudden impact whereas the mild steel shows only deformation and did not fracture. 4. Besides the area where the carbon steel fractures is shinny and smooth which shows that it fractures without much deformation. 5. The diagram below shows fracture surface of the mild steel. 6. The diagram below indicates the fracture surface of the carbon steel. Based on the results, it is clear that the ductility of mild steel is higher than carbon steel.The presence of carbon in carbon steel has minimized its ability to absorb energy from the impact. CONCLUSION In conclusion, we can conclude that mild steel has a high level of ductility than carbon steel. Mild steel is tougher than carbon steel. REFERENCE 1. William F. Smith and Javad Hashemi â€Å"Foundation of Materials Science and Engineering† McGraw Hill, 2005 2. David D. Rethwish and William D. Callister â€Å"Fundamentals of Material Science and Engineering†, John Wiley & Sons, 2008 3. Lab worksheet 4. Rollesen â€Å"Metallurgy For Engineering†, ms 15

Beauty And Natural World William Shakespeare Essay

Beauty and Natural World Shakespeare occupied an unparalleled figure in English Literature. He created 154 sonnets. The Shakespeare sonnet is a bright pearl in English poetic history. The most famous one is probably Sonnet 18, often alternatively titled â€Å"Shall I compare thee to a summer’s day†? It is one of the part of the Fair Youth sequence which published its first edition in 1609. In the work, the speaker described the destructive power of time. The eternal beauty that are bought from the poem to the one he loves. A nice summer’s day is usually transient, but the beauty in poetry can last for ever. Nicholas Moschovakis in his article â€Å"Sonnet 18† in The Facts On File Companion to Shakespeare said â€Å"The famous Sonnet is a paradox†(Moschovakis 280). However, I think that this poem represents Shakespeare’s spirituality. His belief and message that he tried to convey through the sonnet was that good things will last forever. In t he beginning of the article, Moschovakis mentioned, â€Å"It praises the beloved but denies the beloved the benefit of that praise. † (Moschovakis 280). He thought Shakespeare compared the young man to be as beautiful as summer. However, as you read more of the sonnet, the narrator contradicts himself as he realizes that summer can be harsh and brutal. It is too short and won’t last forever. The young man that was compared to summer is seen as more beautiful; he is considered almost perfection. The author believed the speaker is not praising the youngShow MoreRelatedEssay on The Life of William Shakespeare1042 Words   |  5 PagesLife of William Shakespeare William Shakespeare is one of the most identifiable icons of England. Shakespeare was one of the greatest and most influential playwright and poet during his lifetime. He is known as the greatest dramatist of all time due to his many poems and plays, such as â€Å"Shall I Compare Thee To A Summers Day?† and Romeo and Juliet. 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