August 2018 - Msepostdoc-list

Seminar Notice for Xiaolong Bai's Ph.D. Final Exam. Seminar on Thursday, Sept. 6, at 8:30 a.m., in ARMS 1028; Exam same day at 9:30 a.m., in ARMS 2237
by Son, Rosemary E 27 Aug '18

27 Aug '18

Please consider attending the following Seminar: MATERIALS ENGINEERING SEMINAR “Large Shear Deformation on Automotive Aluminum Alloy” By Xiaolong Bai Purdue MSE Ph.D. Final Exam Advisors: Professor Kevin P. Trumble and Professor Srinivasan Chadrasekar ABSTRACT Aluminum alloy sheets are typically manufactured from cast slabs by multi-step rolling and annealing process. This process is very energy intensive, especially in the homogenization process after casting, which usually is conducted at 480 to 580℃ for up to 48 h. To reduce the processing steps and energy, a shear-based single-step deformation process, large strain extrusion machining (LSEM), was used to create strips from AA6013-T6 with and without preheating of the workpiece. Continuous strips were obtained from this alloy with low workability. Flow patterns through the thickness of the strips exhibited primary shear with grains inclined steeply to the faces of the strips, modified to varying degrees by secondary shear from friction with the tools at the surfaces. Through control of the deformation parameters (strain, strain rate and temperature), a wide range of microstructure could be achieved. In high-temperature LSEM, dynamic recrystallization occurs at lower temperatures than in commercial hot rolling processes. LSEM was performed directly on the as-cast AA6013 without homogenization. By appropriate combination of strain and strain rate, continuous strips were obtained in a single step without preheating directly from the as-cast workpiece. The highly deformed LSEM strip has enhanced workability. It can be cold rolled with at least 73% reduction in a single step without cracking. The strips were characterized by strong shear texture with partial {111} and <110> fibers. After annealing, a mixed texture containing simple shear texture and other texture develops. The annealed strips are expected to have better formability than commercial ones made by rolling. Based on the simple shear LSEM process, a novel way to produce aluminum strip/sheet material is introduced. The alloys are cast into disk-shape workpiece and then transferred to the LSEM line. In this line, continuous strips/sheets are obtained in a single step at room temperature. The materials are then coiled if needed and cold rolled to the final gauge. Finally, the strips/sheets are solution treated for further deformation processing. In this method, the conventional homogenization and hot rolling, including reversing and multi-stand hot rolling, are replaced by a single-step LSEM process at room temperature Date: Thursday, September 6, 2018 Time: 8:30 A.M. Place: ARMS 1028

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Graduate Parent support network
by Son, Rosemary E 23 Aug '18

23 Aug '18

Dear Students and Post Docs, If you are a parent, you may be interested in joining the callout, Thursday, Sept 6, 6:00 p.m. Purdue Graduate Student Center Room 105A. See attachement. Thank you, Rosemary School of Materials Engineering Purdue University Neil Armstrong Hall of Engineering 701 West Stadium Ave. Room 2200 West Lafayette, IN 47907 765-494-4105

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FW: CCO's Professional Development workshops
by Son, Rosemary E 22 Aug '18

22 Aug '18

Hello, all Request you to share information about the CCO's Fall workshops with your graduate students; postdocs are welcome to attend all CCO workshops. Please also feel free to share the flier on your social media platforms. I've attached a PDF version in case that's easier for you to print/share. Attendees may find it helpful to bring their current CV to the very first workshop. [cid:image003.png@01D43A1C.FC0A0F40] Thank you. Amruta Amruta Inamdar, Ph.D. Career Services Consultant - Graduate Students Purdue University Center for Career Opportunities; YONG 245 amruta(a)purdue.edu<mailto:amruta@purdue.edu>; 765-494-1409 For grad students: Twitter<https://twitter.com/GradProfCareers> & Facebook<https://www.facebook.com/PurdueGradCareers/> My Office is a Safe Space

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Seminar Reminder for David Brice's Preliminary Exam Friday, August 17, at 9:00 a.m., in ARMS 1021
by Son, Rosemary E 16 Aug '18

16 Aug '18

Please consider attending the following: MATERIALS ENGINEERING SEMINAR "Application of Surface Severe Plastic Deformation to Ti Alloys for Microstructural Control and Ductility Improvement" By David A. Brice Purdue MSE Ph.D. Preliminary Exam Advisors: Professor David F. Bahr and Professor Kevin P. Trumble ABSTRACT Titanium alloys are valued due to the high tensile strength in combination with low density. Consequently, there is great interest to improve properties without changing chemical composition of established alloys. Severe plastic deformation (SPD) processing techniques offer a viable way of producing materials with improved mechanical properties. SPD processes, such as equal channel angular pressing (ECAP), tend to produce ultra fine grained (UFG) materials that are free of major flaws like cracks; however, the distribution of grain sizes tends to be very uniform, and contributes to the decrease of ductility in UFG materials. Alternatively, the use of Surface Severe Plastic Deformation (SSPD) processes, such as Shot Peening (SP) produce parts that display increased tensile strength with no noticeable decrease in ductility. This is partly due to the localized deformation that takes place in the volume adjacent to the surface. Date: Friday, August 17, 2018 Time: 9:00 A.M. Place: ARMS 1021

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Tomorrow:: MSE Guest Speaker Dr. Valerie L. Wiesner Friday, August 17, 2018 ARMS 1103, Coffee/Snacks, 10:30am - Seminar, 11:00am
by Coar, Stacey L 16 Aug '18

16 Aug '18

Good morning, Please join us Friday for guest speaker Dr. Valerie Wiener from NASA Glenn Research Center. She will be giving a semiar at 11 am. Snacks and coffee will be served at 10:30. I hope to see all of you there. Stacey [cid:image001.png@01D43539.7CB5E350] Stacey Stacey Coar Secretary/Development Assistant School of Materials Engineering Purdue University Neil Armstrong Hall of Engineering 701 West Stadium Ave. Room 2300 West Lafayette, IN 47907 765-494-4100 scoar(a)purdue.edu<mailto:scoar@purdue.edu> Stacey Stacey Coar Secretary/Development Assistant School of Materials Engineering Purdue University Neil Armstrong Hall of Engineering 701 West Stadium Ave. Room 2300 West Lafayette, IN 47907 765-494-4100 scoar(a)purdue.edu<mailto:scoar@purdue.edu>

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FW: Graduate Student Clothing and Toy Exchange - Reminder
by Son, Rosemary E 10 Aug '18

10 Aug '18

The Office of Interdisciplinary Graduate Programs, the Purdue Graduate Student Government and the Graduate Parent Student Network would like to invite you to participate in the first annual graduate student clothing and toy exchange! We would like to invite faculty, staff and graduate students to donate: Gently used clothing for all seasons Children's toys Small pieces of furniture Household items Donations will be accepted at the Purdue Graduate Student Center (PGNW): July 25th to August 17th (Monday thru Friday) 10:00 AM - 6:00 PM All graduate students, both current and incoming, are welcome to check out the exchange and pick up any items they need. The exchange will be held at the Purdue Graduate Student Center (PGNW) on the following dates: August 18th, 19th, and 20th 10:00 AM-12:00 PM and 2:00 PM-4:00 PM Any items that have not been picked up by 4 PM on August 20th will be donated to Goodwill or Charity. Give what you can and take what you need, or just stop by and meet your fellow graduate students! For more information, contact oigp(a)purdue.edu<mailto:oigp@purdue.edu>. Christal Musser Assistant Director Office of Interdisciplinary Graduate Programs The Purdue University Graduate School | Purdue University Ernest C. Young Hall, Room B-40 | 155 S. Grant Street | West Lafayette, IN 47907 Email: musser(a)purdue.edu<mailto:musser@purdue.edu> | Web: www.purdue.edu/ese<http://www.purdue.edu/ese> Phone: 765-494-2102 | Fax: 765-496-6271

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Seminar Notice for David Brice's Preliminary Exam Friday, August 17, at 9:00 a.m., in ARMS 1021
by Son, Rosemary E 09 Aug '18

09 Aug '18

Please consider attending the following: MATERIALS ENGINEERING SEMINAR "Application of Surface Severe Plastic Deformation to Ti Alloys for Microstructural Control and Ductility Improvement" By David A. Brice Purdue MSE Ph.D. Preliminary Exam Advisors: Professor David F. Bahr and Professor Kevin P. Trumble ABSTRACT Titanium alloys are valued due to the high tensile strength in combination with low density. Consequently, there is great interest to improve properties without changing chemical composition of established alloys. Severe plastic deformation (SPD) processing techniques offer a viable way of producing materials with improved mechanical properties. SPD processes, such as equal channel angular pressing (ECAP), tend to produce ultra fine grained (UFG) materials that are free of major flaws like cracks; however, the distribution of grain sizes tends to be very uniform, and contributes to the decrease of ductility in UFG materials. Alternatively, the use of Surface Severe Plastic Deformation (SSPD) processes, such as Shot Peening (SP) produce parts that display increased tensile strength with no noticeable decrease in ductility. This is partly due to the localized deformation that takes place in the volume adjacent to the surface. Date: Friday, August 17, 2018 Time: 9:00 A.M. Place: ARMS 1021

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Seminar Notice for Naomi Deneke's Preliminary Exam Seminar; Tuesday, August 14, at 11:00, in ARMS 1028
by Son, Rosemary E 09 Aug '18

09 Aug '18

Please consider attending the following: MATERIALS ENGINEERING SEMINAR “Visualizing Interfaces: Quantifying Adhesion Across Multiple Length Scales” By Naomi Deneke Purdue MSE Ph.D. Preliminary Exam Advisor: Professor Chelsea S. Davis ABSTRACT Measuring adhesion is important in industries including paint, plastics, and electronics. Although there are test methods for quantifying adhesion such as the tape test, scratch test, blister test, and AFM test, they are often limited in length scale at observing adhesive properties. As a result, there presents an opportunity to better characterize adhesion and the effects of degree of contact (observed at the nano-length scale) on adhesion values. Forster Resonance Energy Transfer (FRET) is the transfer of energy from one molecule, Donor (D), to another, Acceptor (A), when they are between 10-100 Ȧ apart. This physical phenomenon can be used in conjunction with common adhesion tests to observe nanoscale displacements that may be perceived as true contact. In order to achieve this goal, a contact adhesion device has been developed to perform indentation experiments from which pull-off force can be determined for an axisymmetric hard probe (GPa range modulus) into contact with an elastic substrate (MPa range modulus). Surface energy and work of adhesion values can be calculated using force and displacement data acquired by the adhesion device in Johnson-Kendall-Roberts (JKR) theory for elastic contact. The materials used in the test are surface functionalized with either D or A fluorescent molecules to observe FRET and subsequently nanoscale displacements. Experiments are performed over an inverted fluorescence microscope to quantify FRET efficiency, ε (a distance, dependent measurable variable related to FRET), and thus provide insight visually and qualitatively on how degree of contact impacts adhesion. Date: Tuesday, August 14, 2018 Time: 11:00 A.M. Place: ARMS 1028

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parking passes
by Coar, Stacey L 08 Aug '18

08 Aug '18

If you get a parking pass, check your mailbox as I have put several in mailboxes this week :) Stacey Stacey Coar Secretary/Development Assistant School of Materials Engineering Purdue University Neil Armstrong Hall of Engineering 701 West Stadium Ave. Room 2300 West Lafayette, IN 47907 765-494-4100 scoar(a)purdue.edu<mailto:scoar@purdue.edu>

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MSE Guest Speaker Dr. Valerie L. Wiesner Friday, August 17, 2018 ARMS 1103, Coffee/Snacks, 10:30am - Seminar, 11:00am
by Coar, Stacey L 06 Aug '18

06 Aug '18

Good afternoon, Please join us Friday for guest speaker Dr. Valerie Wiener from NASA Glenn Research Center. She will be giving a semiar at 11 am. Snacks and coffee will be served at 10:30. I hope to see all of you there. Stacey [cid:image001.png@01D42D8C.9A111870] Stacey Stacey Coar Secretary/Development Assistant School of Materials Engineering Purdue University Neil Armstrong Hall of Engineering 701 West Stadium Ave. Room 2300 West Lafayette, IN 47907 765-494-4100 scoar(a)purdue.edu<mailto:scoar@purdue.edu>

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