August 2012 - Msepostdoc-list

Fwd: AAE Colloquium 09/20/2012 : Antonios Kontsos, PhD
by Donna Bystrom 31 Aug '12

31 Aug '12

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Fwd: FW: Physical Facilities Connection - August 30, 2012
by Donna Bystrom 31 Aug '12

31 Aug '12

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Fwd: MSE Event 9-28-12
by Donna Bystrom 30 Aug '12

30 Aug '12

Greetings Everyone, *You’re invited! *MSE will be hosting an event in conjunction with Family Weekend on the Purdue campus. The welcome event, being held on September 28^th from 5:30 – 7:30pm, will introduce the new MSE Head, Dave Bahr, and will be a casual cookout under a tent in front of Armstrong Hall. The invite list includes all living MSE alums, faculty, staff, and students. The menu will feature both gluten-free and vegetarian options and the event should be a great opportunity to network! More information is available on the attached flyer. Please rsvp on the MSE website, www.purdue.edu/mse <http://www.purdue.edu/mse>, under News and Events.

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Seminar Notice - M. Johnston - Ph.D. Prelim Part I, Wed. Sept. 5, 2012, 1:30 PM, ARMS 3115
by Stacey, Lisa A 29 Aug '12

29 Aug '12

MATERIALS SCIENCE AND ENGINEERING SEMINAR Polylactide-Methacrylate Polymer Systems for Bone Repair by Michael Laird Johnston Ph.D. Prelim Part I Exam Co-Advisors: Prof. J. Wilker Prof. J. Blendell ABSTRACT Bone defect and fracture repair using specialized adhesives will have clinical benefits, resulting in lower social costs to healthcare, but more importantly, generate greater quality of life for the patient. Bone adhesives are an attractive method over traditional reparative approaches (sutures, plates, or staples) as the later damages healthy tissue or potentially induce microcracks during fixation. Adhesives are also particularly useful, for small bone fragments from highly comminuted fracture as it is difficult to hold these fragments in place during reconstructive surgery. Research in surgical adhesives is in its infancy, and a system tailored specifically for the use on bone has yet to be determined. This presentation reviews the use of polylactide-methacrylate as a potential candidate for bone adhesives to treat bone fracture or defects. Additionally, future work to increase adhesion between bone surfaces, promote the fracture healing cascade, and quantify the mechanical stability of the adhesive will be proposed. Date: Wednesday, Sept. 5, 2012 Time: 1:30 P.M. Place: ARMS 3115 Lisa Stacey Secretary/Development Assistant Purdue University School of Materials Engineering 765/494-4100

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Peter G. Winchell Lecture Series Seminar Notice - M. Bazant, Fri., Sept. 7th 3:30 PM
by Stacey, Lisa A 29 Aug '12

29 Aug '12

Please see attached Seminar Notice. Hope to see you there, Lisa Stacey Secretary/Development Assistant Purdue University School of Materials Engineering 765/494-4100

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FW: REMINDER - SEMINAR NOTICE - J. Busch, Mon. 8/27, 2:30 PM, ARMS 3115
by Stacey, Lisa A 27 Aug '12

27 Aug '12

MATERIALS SCIENCE AND ENGINEERING SEMINAR Flux Entrapment and Titanium Nitride Defects During Electroslag Remelting by Jonathan D. Busch Masters of Science Final Exam Advisor: Prof. M. Krane ABSTRACT Electroslag remelted (ESR) ingots of INCOLOY alloys 800 and 825 are particularly prone to macroscale slag inclusions and microscale cleanliness issues. Formation of these structures near the ingot surface can cause significant production yield losses (~10%) due to the necessity of extensive surface grinding. Slag inclusions from near the outer radius of the toe end of alloy 800 and 825 ingots were found to be approximately 1 to 3mm in size and have a multiphase microstructure consisting of CaF2, CaTiO3, MgAl2O4, MgO and some combination of Ca12Al14O32F2 and/or Ca12Al14O33. These inclusions were often surrounded by fields of 1 to 10μm cuboidal TiN particles. A large number of TiN cuboids were observed in the ESR electrode with similar size and morphology to those observed surrounding slag inclusions in the ESR ingots, suggesting that the TiN particles are relics from ESR electrode production process. Samples taken sequentially throughout the EAF-AOD processes showed that the TiN cuboidals that are found in ESR ingots form between tapping the AOD vessel into the AOD ladle and the casting of ESR electrodes. Analysis of slag skin at various heights of alloy 825 ingots revealed that the phase fraction of CaF2 decreased, TiCaO3 increased and Ca12Al14O32F2 increased from toe to head. The increase in TiO2 content suggests that at most a two-fold increase in viscosity would be expected. Similar analysis of alloy 800 ingots did not reveal significant trends in slag skin composition, possibly due to differences in ingot geometry or the presence of Al toe additions during the remelting of alloy 800. Directional solidification experiments were conducted to determine the solidification sequences of two common ESR slags: Code 316 (33% CaF2, 33% CaO, and 33% Al2O3) and Code 59 (50% CaF2, 20% CaO, 22% Al2O3, 5% MgO, and 3% TiO2). In both cases the changes in slag phase fraction as a function of solidification time were not as significant as predicted. This suggests substantial solute concentrations within each phase, significant gas phase reactions or insufficient imposed temperature gradient for directional planer solidification.OM and SEM analysis revealed a dendriti structure with Ca12Al14O32F2 as the primary phase. EDS analysis showed that Al segregates to the primary phase while F segregates to the interdendritic region. Parametric studies using a numerical model of ESR suggests that the ESR process is quite sensitive to changes in slag electrical conductivity and not very sensitive to changes in slag viscosity. Date: Monday, August 27, 2012 Time: 2:30 P.M. Place: ARMS 3115 Lisa Stacey Secretary/Development Assistant Purdue University School of Materials Engineering 765/494-4100

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Fwd: Invitation to Faculty Advancement, Success & Tenure Series
by Donna Bystrom 24 Aug '12

24 Aug '12

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FW: SEMINAR NOTICE - J. Busch, Mon. 8/27, 2:30 PM, ARMS 3115
by Stacey, Lisa A 23 Aug '12

23 Aug '12

MATERIALS SCIENCE AND ENGINEERING SEMINAR Flux Entrapment and Titanium Nitride Defects During Electroslag Remelting by Jonathan D. Busch Masters of Science Final Exam Advisor: Prof. M. Krane ABSTRACT Electroslag remelted (ESR) ingots of INCOLOY alloys 800 and 825 are particularly prone to macroscale slag inclusions and microscale cleanliness issues. Formation of these structures near the ingot surface can cause significant production yield losses (~10%) due to the necessity of extensive surface grinding. Slag inclusions from near the outer radius of the toe end of alloy 800 and 825 ingots were found to be approximately 1 to 3mm in size and have a multiphase microstructure consisting of CaF2, CaTiO3, MgAl2O4, MgO and some combination of Ca12Al14O32F2 and/or Ca12Al14O33. These inclusions were often surrounded by fields of 1 to 10μm cuboidal TiN particles. A large number of TiN cuboids were observed in the ESR electrode with similar size and morphology to those observed surrounding slag inclusions in the ESR ingots, suggesting that the TiN particles are relics from ESR electrode production process. Samples taken sequentially throughout the EAF-AOD processes showed that the TiN cuboidals that are found in ESR ingots form between tapping the AOD vessel into the AOD ladle and the casting of ESR electrodes. Analysis of slag skin at various heights of alloy 825 ingots revealed that the phase fraction of CaF2 decreased, TiCaO3 increased and Ca12Al14O32F2 increased from toe to head. The increase in TiO2 content suggests that at most a two-fold increase in viscosity would be expected. Similar analysis of alloy 800 ingots did not reveal significant trends in slag skin composition, possibly due to differences in ingot geometry or the presence of Al toe additions during the remelting of alloy 800. Directional solidification experiments were conducted to determine the solidification sequences of two common ESR slags: Code 316 (33% CaF2, 33% CaO, and 33% Al2O3) and Code 59 (50% CaF2, 20% CaO, 22% Al2O3, 5% MgO, and 3% TiO2). In both cases the changes in slag phase fraction as a function of solidification time were not as significant as predicted. This suggests substantial solute concentrations within each phase, significant gas phase reactions or insufficient imposed temperature gradient for directional planer solidification.OM and SEM analysis revealed a dendriti structure with Ca12Al14O32F2 as the primary phase. EDS analysis showed that Al segregates to the primary phase while F segregates to the interdendritic region. Parametric studies using a numerical model of ESR suggests that the ESR process is quite sensitive to changes in slag electrical conductivity and not very sensitive to changes in slag viscosity. Date: Monday, August 27, 2012 Time: 2:30 P.M. Place: ARMS 3115 Lisa Stacey Secretary/Development Assistant Purdue University School of Materials Engineering 765/494-4100

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FW: Screenings in Johnson Hall on August 27 & 28
by Stacey, Lisa A 23 Aug '12

23 Aug '12

Please see note below regarding free annual Wellness Screenings Lisa Stacey Secretary/Development Assistant Purdue University School of Materials Engineering 765/494-4100 From: Marti L. Van Court Sent: Thursday, August 23, 2012 9:26 AM To: Stacey, Lisa A Subject: Screenings in Johnson Hall on August 27 & 28 It's that time again, folks! Time for Fall Wellness Screenings to start!!! We will be doing wellness screenings in Johnson Hall B-5 (between Pharmacy & Schleman) on August 27 & 28 from 10:00 a.m. through 1:00 p.m. September dates are: Sept. 5, 7 & 11 from 10 a.m. - 1 p.m. in JNSN Sept. 12 from 8:10 a.m. -1:50 p.m. in JNSN Sept. 25 from 8:30-11:30 a.m. and 1:10-3:10 p.m. in STEW 214 A&B Sept. 28 from 8:30-11:30 a.m. and 1:10-3:10 p.m. in STEW 302 Faculty, staff, post docs and their spouses are eligible for one free wellness screening per calendar year, as well as graduate staff (RAs, TAs, GAs). Grad staff spouses may get a screening for $20. To sign up, go to: www.purdue.edu/worklife<http://www.purdue.edu/worklife> and click on 'register now' on left side. Enter career account and click on 'courses offered'. Look for 'wellness screenings' and find date preferred. Or, you may email me at vancourt(a)purdue.edu<mailto:vancourt@purdue.edu> or call 46341. Appointments should take 20-30 minutes. Thanks, Marti

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Seminar Reminder CORRECTION (Meredith, 8/16 10:00 AM ARMS 1109)
by Stacey, Lisa A 15 Aug '12

15 Aug '12

Please note the correct time for Heather Meredith's Ph.D. Prelim Part I Exam Seminar tomorrow is 10:00 in ARMS 1109. Thank you, Lisa Stacey Secretary/Development Assistant Purdue University School of Materials Engineering 765/494-4100

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