WEEKLY MEMO, March 31, 2008 ********* 1. KUDOS ********* 1.1: KALAPI BISWAS wins a Graduate Student Silver Award at the Spring MRS meeting held in San Francisco. Her award was presented a ceremony held on Wednesday (03.26.08) evening. The award prizes consist of $400 and a presentation plaque for the Gold Awards and $200 and a certificate for the Silver Awards. All finalists also received a waiver of the meeting registration fee and a one-year MRS student membership commencing July 1, 2008. Kalapi won with her presentation, ³LL5.2: Bi2Te3 Nanowire Composites for Thermoelectric Devices.² A complete list of the winners is located at http://www.mrs.org/s_mrs/doc.asp?CID=12356&DID=201572 <http://www.mrs.org/s_mrs/doc.asp?CID=12356&DID=201572> 1.2: VIJAY RAWAT and KALAPI BISWAS win first prize in two categories, ³Best Presentation² and ³Best Poster,² for their poster ³Novel thermoelectric materials and devices for waste heat harvesting" during Pugwash's third annual Midwest Regional Conference, ³Energy and the Environment: Powering the Future Responsibility." ***************** 2. ANNOUNCEMENTS ***************** 2.1: 2nd Annual BNC Research Review, Monday, April 14th, 2008, 1:00PM, MRGN 121. I hope you can attend. Program to include Tim Sands, ³The Birck Nanotechnology Center ­ Progress, Opportunities, and Challenges²; Evgenii Narimanov, ³Metamaterials for Future Photonics²; Donald Bergstrom, ³Carbon Nanotubes as Nucleic Acid Carriers²; Gerhard Klimeck, ³nanoHUB ­ Future Cyberinfrastructure Serving over 60,000 Users Today²; Jayathi Murthy, ³An Introduction to PRISM and MEMS Simulation²; and David Janes on nanoelectronics. A poster review and session will also be included in this year¹s activities. Visit www.nano.purdue.edu <http://www.nano.purdue.edu> for the most up-to-date information regarding this year¹s Annual Research Review. 2.2: ******REMINDER****** CLEANROOM AND LAB PREVENTATIVE MAINTENANCE SCHEDULE: MONDAY, 03.31.08 TO FRIDAY, 04.04.08 Monday, 03.31.08, 10:00 AM: All materials must be removed from cleanroom solvent hoods. Monday, 03.31.08, 4:00 PM: All materials must be removed from the remaining cleanroom hoods. CLEANROOM CLOSED. Tuesday, 04.01.08 7:30 AM: No ultrapure water available. No acid processing in laboratories. No hazardous gases available. CLEANROOM CLOSED. Wednesday, 04.02.08, all day: No ultrapure water available. No acid processing in laboratories. No hazardous gases available. Wednesday, 04.02.08, 4:00 PM: All materials must be removed from laboratory hoods (including biosafety cabinets; all bio materials must be removed from exhausted enclosures). Thursday, 04.03.08, 8:00 AM: Cleanroom will re-open, barring unforeseen circumstances. All solvent hoods and processes will remain down for general exhaust upgrades. LABORATORIES CLOSED. Thursday, 04.03.08 Friday, 04.04.08, 8:00 AM: Laboratories will re-open and Cleanroom general exhaust should be operational, barring unforeseen circumstances. Questions or comments? Contact Mark Voorhis (mvoorhis@purdue.edu) 2.3: Indiana Health Industry Form: ³Innovention 08 ‹ Improving the Value of Healthcare; Connecting the Industry Like Never Before!² July 28-29, 2008, Indiana Convention Center. Registration opens April 1, 2008. For more information and event updates, please visit www.ihif.org <http://www.ihif.org> . ******************** 3. SEMINARS ******************** 3.1: Wednesday, April 2, 2008, 6:00PM, MRGN 121: Bioethics Seminar, ³Conflicts of Interest in Biomedicine,² by David Resnik. Issues surrounding conflicts of interest and the commercialization of research are both timely and vital to Purdue¹s research community. BIO: Dr. Resnik is the Bioethicist for the NIH and the NIEHS. His extensive experience and publication record both in philosophy and in the sciences promise this to be a very interesting talk! More information, including Resnik¹s CV, is available online at www.purdue.edu/bioethics <file://www.purdue.edu/bioethics>. 3.2: Friday, April 4, 2008, 3:30 refreshments, 3:45 sminar, ARMS 1010: ³Laser Weldability of Nickel and Cobalt Based Alloys,² by Henry J. White, Haynes International, Kokomo, IN ABSTRACT: For nearly a century, arc welding has been the primary technique used to join both nickel and cobalt based alloys. The advantages (excellent corrosion resistance, increased productivity, etc.) of a deep and narrow weld geometry with a limited heat affected zone led to the first detailed study of laser welding of Hastelloy® and other nickel based alloys- Welding Journal 1986. A modification of the ³Weeter Laser Weldability Test² was used to evaluate eighteen commercially available and five experimental alloys produced by Haynes International. The original test involves drilling a matrix of holes of various diameters (0.343 to 0.572 mm) and depths (0.127 to 0.508 mm) in the material. Then a laser (Nd- YAG, CO2, Fiber, etc.) is used to make spot welds in the drilled holes. A laser spot size greater than the drilled hole diameter is selected so that the absence of metal in the drilled hole causes the solidified spot weld to have a concave contour. By varying the depth and width of the drilled hole the weld restraint and the depth of the cavity resulting from the solidified spot weld changes. By measuring the depth of the cavity at which the alloy exhibits incipient cracking, ³Weeter index², a rating of the material¹s weldability is obtained. In this study a ramp (depth from 0.127 to 0.508 mm) / taper (width from 0.343 to 0.572 mm) geometry was machined into each specimen. A Fiber Laser (IPG Photonics) was used to produce an autogeneous bead on plate weld in the ramp/ taper region. A laser spot size, greater than the restraint area, was used to ensure that the resulting cavity assumes a concave contour. As in the original test procedure, the cavity depth at which the alloy exhibits incipient cracking was measured/ recorded and used as a rating of the material¹s weldability. We will report on the laser weldability of corrosion resistant (Hastelloy B-3®, C-4, C-22®, C-276, C-2000®, G-3, G-30®, G-35®), high temperature (Haynes® 25, HR-120®, HR-160®, 188, 230®, 242®, 282®, 556®, 625, Hastelloy X), and five experimental alloys which have been/ will be used in the chemical, hygienic, aerospace, and the automotive industries. We will compare these test results with Varestraint Testing (a technique used to evaluate the arc weldability of materials) done on the same materials and comment on hot cracking propensity/ mechanisms. SHORT BIO: Dr. Henry J. White, a Registered Professional Engineer in the State of Indiana, joined Haynes International in 2007 as Welding Metallurgist/ Senior Staff Engineer. He has a B.S. in Metallurgical Engineering from Polytechnic University, M.S. in Materials Science and Engineering (Welding Metallurgy) from The University of Tennessee, Knoxville, and Ph.D. in Materials Science and Engineering from SUNY Stony Brook. After completing his BS, Dr. White worked as a Metallurgical Engineering for ABB Lummus Global where he developed/ reviewed welding procedure specification/ procedure qualification records and selected material of construction for Ethylene, Styrene, and Maleic Anhydride petrochemical plants. After completing his MS, Dr. White worked for Misonix Incorporated as a Materials Engineer where he developed welding procedures and selected materials for ultrasonic medical instrumentation. While in graduate school, Dr. White managed the heat treatment facilities for Skyo Industries Inc. a mill to market torsion tool manufacturer. At Skyo Industries Inc., Dr. White designed new materials and heat treatment procedures to improve and maintain tool quality. Dr. White was a member of the faculty in the Materials Science and Engineering Department at Stony Brook University from 1996-2007. During this period he was an National Science Foundation Career Awardee, Chairman of the Metro NY/ NJ Chapter of the American Society of Materials International, Accreditation Board of Engineering & Technology Materials Science and Engineering Program Evaluator, and Subject Matter Expert for the National Council of Examiners for Engineering and Surveying. He continues to participate in the later two activities. *********************** 4. DISCOVERY PARK NEWS *********************** 4.1: Burton Morgan building: security procedures adjusted: Effective March 31st, the building will be locked at 6:00 p.m. There will no longer be a student hired to ³sit² in the building. When events are scheduled in the building during the evenings or weekends, Denny Heath will hire students from the Purdue Security and Safety Patrol (PSSP) as needed to keep an eye on the facility. There will be a charge for this service, which runs ~$10.00/hour with a minimum charge of $30.00. If a DP Staff Member will be acting as the guest liaison for your event and wants to assume the responsibility for building security we would need to know this at the time the room reservation is made. In these instances, we would not need to hire the student patrol. All groups outside of Discovery Park will automatically be required to use the student patrol service. When a late reservation request is made (1-2 weeks), and a PSSP cannot be hired due to student availability, the building doors will be locked at 6pm. It will be the responsibility of the guest liaison to make arrangements to gain access to the building and to open the main doors for their attendees. These arrangements can be made through Denny Heath and/or Valerie Lawless. These procedures are consistent with University Policy and will help us safeguard the facility. Reservations should be requested by e-mail to Ruth Ann Weiderhaft at weiderhaft@purdue.edu. The request should include the name of the group, date/time # of people, and room requested. When events and meetings are scheduled in the building outside of regular hours, Ruth Ann Weiderhaft will forward a request to Denny Heath and Valerie Lawless to keep the building unlocked for the meeting time. This will also be the time when patrol students will be requested as needed.