ASM - Atlanta Newsletter of the Atlanta Chapter of ASM International Meets 3rd Tuesday May, 2001 Volume 7 Number 9

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ASM - Atlanta Newsletter of the Atlanta Chapter of ASM International Meets 3rd Tuesday May, 2001 Volume 7 Number 9 Meeting of the Atlanta Chapter of ASM Tuesday Evening, May
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ASM - Atlanta Newsletter of the Atlanta Chapter of ASM International Meets 3rd Tuesday May, 2001 Volume 7 Number 9 Meeting of the Atlanta Chapter of ASM Tuesday Evening, May 15, 2001 At the Georgia Tech Ferst Place Cafeteria, PROGRAM Nondestructive Thermographic Detection of Fatigue Damage: Experiments and Theoretical Modeling presented by Dr. Peter K. Liaw Department of Materials Science and Engineering The University of Tennessee also Ceramic to Metal Linear Cellular Materials A 10 minute Ph.D. student presentation by Kevin Hurysz ASM Chapter Meeting Tuesday Evening, May 15, 2001 Wine Reception & Social: 6:00 PM Dinner: 7:00 PM Introductions & Business: 7:50 PM Mr. Hurysz s Presentation: 8:00 PM Dr. Liaw s Presentation: 8:15 PM Costs: $20.00 Regular, $6.00 Students MENU: A dinner menu of Southern Cuisine: tossed salad, fried chicken with gravy, black-eyed peas, green bean casserole, mashed potatoes with butter, corn bread, fruit cobbler & sweet tea. WHERE -- Georgia Tech Ferst Place Cafeteria, 3rd floor of Student Center Building (next to the campanile). Parking is available at the Student Center visitor parking lot off Ferst Drive. Reservations: RSVP - by 11:00 AM on Monday, May 14, to Marlene White, Tel: (404) , Fax: (404) , Note: A policy of ASM International is that one never pays to attend a regular Chapter meeting program. So, if you desire to eat elsewhere, you remain very welcome for the program. Abstract: Nondestructive Thermographic Detection of Fatigue Damage: Experiments and Theoretical Modeling High-cycle and low-cycle fatigue experiments were conducted on reactor pressure vessel (RPV) steels. Highcycle fatigue tests were performed using an advanced electrohydraulic machine, which has a frequency range from approximately 20 to 1,000 Hz, while low-cycle fatigue tests were done with strain amplitudes from 0.3 to 0.6 %. A high-speed and high-sensitivity thermographic infrared (IR) imaging system has been used for nondestructive evaluation of temperature evolution during fatigue testing of RPV steels. The temperature sensitivity of the camera is 0.015ºC at 23ºC. High-speed data acquisition capabilities are available at 150 Hz with a full frame, and 6,100 Hz with a narrow window. A fully-automated software system was employed to acquire temperature distributions of the test samples during fatigue experiments. Thus, the IR camera can be used to monitor in situ temperature evolutions resulting from fatigue. Five stages of temperature profiles were observed during high-cycle fatigue testing: an initial increase of the mean temperature of the test sample, a followed decrease of the temperature, a saturation-temperature region, an abrupt increase of temperature, and a drop of temperature after specimen failure. The measurements of temperature oscillations within each fatigue cycle at 20 Hz has been attempted. During each fatigue cycle, the temperature was detected to oscillate within 0.5ºC depending on the loading conditions and test materials. When the applied stress reached the minimum, and the temperature typically approached the maximum. However, the applied maximum stress did not necessarily correspond to the minimum temperature. Increasing the test frequency from 20 Hz to 1,000 Hz was generally found to decrease fatigue life. Temperature evolutions offered possible explanations for the frequency effect on the S (stress) N (number of cycles to failure) curve in the range of 20 Hz to 1,000 Hz. A theoretical framework was attempted to predict temperature evolutions based on thermoelastic and inelastic effects, and heat-conduction models. Temperature oscillation during fatigue resulted from the thermoelastic effects, while the increase in the mean temperature derived from the inelastic behavior of the materials. The predicted temperature evolutions during fatigue were found to be in good agreement with the thermographic results measured by the advanced high-speed and high-sensitivity IR camera. The stress-strain hysteresis loops and the inelastic strains during high-cycle fatigue were back-calculated from the measured temperatures, which indicates that thermography could be used for detecting fatigue damage. Using the concept of the tensile hysteresis energy, the measured mean temperature was used to predict the low-cycle fatigue life, which was found to be consistent with the experimental results. We are very grateful to our team members who significantly contribute to the research work, including B. Yang, L. Jiang, H. Tian, H. Wang, L. Chen, D. Fielden, C. R. Brooks, J. Y. Huang, R. C. Kuo, and J. G. Huang. The present research is supported by the Institute of Nuclear Energy Research, Taiwan, the Taiwan Power Company, the National Science Foundation (EEC , DMI , and DGE ), Oak Ridge National Laboratory, and the U.S. Department of Energy Secretary for Energy Efficiency and Renewable Energy, and Office of Transportation Technologies, as part of the High Temperature Materials Laboratory User Program under contract DE-AC05-96OR22464, managed by Lockheed Martin Energy Research Corporation. Biography: Peter K. Liaw; Department of Materials Science & Engineering, The University of Tennessee, Knoxville, TN Peter K. Liaw was born in Chiayi, Taiwan. He graduated from the Chiayi High School, obtained his B.S. in Physics from the National Tsing Hua University, Taiwan, and his Ph.D. in Materials Science and Engineering from Northwestern University, USA, in After working at the Westinghouse Research and Development (R&D) Center for thirteen years, he joins the faculty and becomes an Endowed Ivan Racheff Chair of Excellence in the Department of Materials Science and Engineering at the University of Tennessee (UT), Knoxville, since March He has been working in the areas of fatigue, fracture, nondestructive evaluation, and life prediction methodologies of structural alloys and composites. Since joining UT, his research interests include mechanical behavior, nondestructive evaluation, biomaterials, and processing of high-temperature alloys and ceramic matrix composites and coatings. He has published over three hundred and fifty papers, edited sixteen books, and presented numerous invited talks at various national and international conferences. He has been a Key Reader on the Board of Review for Metallurgical Transactions A, International Materials Reviews, and a Technical Advisor to the Journal of Metals (JOM). He was awarded the Royal E. Cabell Fellowship at Northwestern University. He is a recipient of numerous Outstanding Performance awards from the Westinghouse R&D Center. He was the Chairman of the TMS (The Minerals, Metals and Materials Society) Mechanical Metallurgy Committee, and the Chairman of the ASM (American Society for Metals) Flow and Fracture Committee. He has been the Chairman and Member of the TMS Award Committee on Application to Practice, Educator, and Leadership Awards. He is a fellow of ASM. Several of his graduate students have been given awards for their outstanding research and presentations at various professional societies and conferences. Moreover, his students are teaching and doing research at universities, and industry and government laboratories in USA Abstract: Ceramic to Metal Linear Cellular Materials Extrusion is a material forming process that permits the shaping of ceramic paste into a form having constant cross section. The paste is a homogeneous mixture of two phases: a solid phase composed of raw material powders carried by a fluid solution of water, binder, and lubricant. To maximize extrusion efficiency, the paste must be compliant enough to flow through a die yet have a high enough bulk shear stress at low shear rates to avoid deformation following extrusion. 2 A novel technology has been developed at Georgia Tech for the extrusion of thin walled ( 150 um) ceramic honeycomb and subsequent thermochemical processing of the green structure to metal alloy. In this presentation, I'll talk about the prediction and modeling of paste properties and their relationship to quality extrusion. There will be plenty of samples - ceramic and metal - on hand to show off this promising technique for manufacturing high strength, low density structures. Kevin Hurysz is currently a Ph.D. student in Materials Science and Engineering at Georgia Tech. He received his M.S. in that field from Georgia Tech in 1998 and his B.S. in Ceramic Engineering from Alfred University in Phone: Dr. Subi Dinda of the Daimler-Chrysler Corporation describes some of the issues relevant to innovative designs and new emerging materials in the manufacturing of 21 st century vehicles at the April Atlanta ASM meeting. Vijay Yelundur presenting his work with High Efficiency Ribbon Silicon Solar Cells at the April Atlanta ASM meeting. 3 Atlanta ASM Chairman's Message by John L. Mihelich At our April dinner meeting, Dr Subi Dinda of DaimlerChrysler and Trustee of ASM presented his views of Materials Challenges-21 st Century for the US automobile industry. By lightweighting the vehicle and improving the efficiency of the power plant, using hybrid systems or fuel cell technology for example, the industry s goal of making an 80-mpg vehicle can be achieved. Use of lightweight metals, aluminum and magnesium, will play a major role in achieving success. Many of us have found that our meetings and tours offer an excellent opportunity to network with peers from Tech and from industry. It s a great way to stay on top of what is happening locally in the materials field. Why not bring a colleague along too, to experience the fellowship of your ASM Atlanta Chapter! Ben Church Receives ASM Award Ga Tech grad student, Vijay Yelundur presented a summary of his work to date on High Efficiency Ribbon Silicon Solar Cells. His work is showing significant improvement in solar cell efficiency approaching the 18% efficiency goal set by the US Photovoltic Industry. This compares to 3 to- 5% efficiency of today s photovoltic cells. A great leap forward! As part of your Chapters continuing Education effort, Kim Spinsby, our 1 st Vice Chair has identified a prime candidate for Nationals Materials Camp Program. He is Josh Sofsky who is a rising junior and is very interested in chemistry and math and would like to gain a flavor of materials. This week long program in August is held Materials Park, Ohio and the student get to use ASM s lab facilities for some hands-on work. It is a super learning experience for the participants and may lead some of them into careers in our field. Your Chapter has nominated Josh and we await word from National as to his selection. The Executive Committee discussed the idea of having a local Materials Camp using the facilities at Ga Tech. Dr. Dinda will take that concept back to the Board of Trustees for their input. This would be an excellent way to get a larger number of bright students in our area to experience materials technology. Our May dinner meeting is the last one of the season. Our speaker will be Professor Peter Liaw from the University of Tennessee. He will explain his work on nondestructive testing of fatigue of metals. The Abstract of his talk was provided at the beginning of this NewsLetter. The Executive Committee has reviewed the final revised version of Chapter Rules/Bylaws. Bill Livesay did the job and has sent these in to National for their approval. Following Nationals approval, the Rules/Bylaws will be released to the Chapter membership. The Chapter s Annual Meeting in May will then follow these Rules and officers will be elected to serve the term. Our Nominating Committee has prepared a slate of candidates. Members can also name additional candidates, if they wish, up until the vote is taken at our 15 May meeting. Ben Church (L) recently received the ASM-Atlanta Chapter's Graduate Student Award for the 2000/2001 academic year. Presenting the award to Ben is Kim B. Spinsby, Atlanta ASM 1 st Vice Chair Ben has actively participated in student chapter activities, and has outstanding academic and research accomplishments. He is the President of the ASM/TMS student chapter and has assisted the Atlanta Chapter with educational outreach activities and with demonstrations for high school students and teachers. Ben joined the graduate program in Materials Science and Engineering at Georgia Tech during the Fall of He has maintained a 4.0 GPA and has excelled in research. We are sure to see him continue to be active in student chapter as well as the Atlanta chapter activities in the coming years. Mr. Church was strongly recommended for this award by the MSE faculty, and past and present student chapter chairs. Along with the high honor of receiving this presentation at the Georgia Tech Awards ceremony on April 17, the graduate student award includes a certificate from ASM-Atlanta, a $250 cash prize, and $250 worth of ASM publications of Ben s choice. Atlanta Chapter Sustaining Memberships The Atlanta Chapter of ASM is strongly encouraging companies and other organizations having materials related interests to sign up with the Chapter s Sustaining Membership program. Contact Subu Shanmugham MicroCoating Technologies, 5315 Peachtree Industrial 4 Blvd., Chamblee, GA V; CALL FOR STUDENTS A New Program at The University of Tennessee in Materials Lifetime Science & Engineering The University of Tennessee recently was awarded a five-year 2.7 million dollar grant from the National Science Foundation (NSF) to establish an Integrative Graduate Education and Research Training (IGERT) Program in Materials Lifetime Science and Engineering. The Program involves extensive education and research collaborations among three universities (The University of Tennessee, Lehigh University, and Rutgers University), a prominent national laboratory (Oak Ridge National Laboratory), and four industrial companies (Engineering Technology Center, Analysis & Technology, Inc.; Boeing Company; General Electric Company; and Haynes International, Inc.). The NSF IGERT Program represents a joint effort of 29 scientists and engineers from the above universities, national laboratory, and industries, with faculty participants being drawn from nine different academic Departments: Materials Science and Engineering; Mechanical and Aerospace Engineering, and Engineering Science; Mechanical Engineering and Mechanics; Chemistry; Civil and Environmental Engineering; Industrial Engineering; Biochemistry, Cellular, and Molecular Biology; Statistics; and Education. The Program consists of four integrated components: [1] major research efforts with emphases on the environmental/mechanical synergistic interactions that often control materials lifetimes, [2] a new Ph.D. curriculum featuring integrative courses, [3] industrial and national-laboratory internships, and a student-exchange program among the universities, and [4] advanced, computerbased education/research technologies. A major outcome of the Program will be Ph.D. graduates with a unique education/research background who can assume leadership roles in the solutions of complex technological problems involving materials lifetime science and engineering, resulting in accurate lifetime predictions and significant lifetime extensions of aging structural materials and components, and the development of new materials with improved lifetimes. Undergraduate students, in preparation for graduate studies, may participate in the research activities of this NSF IGERT Program. Call for Graduate Students Graduate students (US citizens or permanent residents) will have unique opportunities to: Earn a Ph.D. at The University of Tennessee, Lehigh University, or Rutgers University in a new, integrated, multidisciplinary curriculum emphasizing materials lifetime science and engineering; Participate in a novel student-exchange program, spending a semester at one of the non-home universities; Receive on-site industrial case-study and research training through an industrial internship at the Engineering Technology Center -- a well-established consulting company specializing in developing advanced computational/design tools for structuralintegrity analyses, at the Boeing Company -- a leading aircraft company with expertise in aging aircraft materials, at the General Electric Company -- a large, diversified company with world-class gas-turbine and jet-engine technologies, or at Haynes International -- a prominent superalloy company with vast knowledge in aging superalloys; Receive an internship at the Oak Ridge National Laboratory; Experience the most advanced, computer-based teaching methods, including the use of multimedia educational tools, teleeducation/research training methods, and Web-based electronic notebooks; Utilize state-of-the-art research equipment and computational facilities at the universities and industries, and at Oak Ridge National Laboratory -- a world-renowned national laboratory; Receive integrated course work and research training aimed at developing mathematical models to predict more accurately the lifetimes of existing materials used in critical applications, such as aircraft structures, jet engines, steam generators and turbines, bridges, and surgical implant devices; Receive integrated course work and research training aimed at developing new materials with longer lifetimes; Study conventional materials, such as steels and aluminum alloys, and advanced materials, such as composites, superalloys, intermetallics, metallic glasses, biomedical materials, and nanostructural materials; and Graduate with a unique Ph.D. and exceptionally diverse, graduate-school experiences, resulting in high-demand employment in this exciting field. For both graduate and undergraduate students who are interested in this program, Please contact: Dr. Peter Liaw ( , Dr. Ray Buchanan ( , Dept. of Materials Science & Engineering The University of Tennessee, Knoxville, TN See our Web site: Update Your Record at ASM International ASM International requests that each member go to the ASM web site in order to verify your addresses, contact details, , etc. You will use your member number, found on your ASM Membership card or on a mailing label from ASM, to access your personal record. Find this page under For Members Only. 5 Nominations for ASM Chapter Officers The Nominating Committee, Chaired by Prof. Naresh Thadhani plans to place the following slate of officers in nomination at the Atlanta ASM Chapter annual business meeting on May 15. Chapter Chair: Kim B. Spinsby, Siemens Energy & Automation Vice Chair, Academic Affairs: Steve Johnson, Ga Tech School Materials Science & Engineering Vice Chair, Programs: Subu Shanmugham, MicroCoating Technologies Vice Chair, Industry Relations: George W. Kremer, Consultant Secretary: Gautam R. Patel, Georgia Tech GTRI Treasurer: James F. Lane, Applied Technical Services ASM-Atlanta The Atlanta Chapter of ASM does not normally have programs during the summer months. The next scheduled issue of the newsletter, ASM-Atlanta will be in September, However, as the chapter learns of seminars or other programs in the Atlanta area of interest to the membership, you may receive notices of these events. However, we need your address. Newsletter ; If you are not receiving this Newsletter via , it is only because we don t know your address. If NOT receiving the version, please send an e-message to Bill Livesay at with one word, ASM, as both the subject and body of the message. Ultimately, we would like the distribution to be nearly all , but we currently have fewer than half of the membership s correct addresses. The Features of ASM-Atlanta include: Program Notes for Meetings Chairperson's note to members. Career Development: job opportunities or jobs needed Company Feature: Short description of what a particular company does - that is informative to other members - not just an advertising item Technical Features: Short (one page or less) descriptions of an interesting technical or scientifi
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