October 2019 - Msepostdoc-list

MSE 690 Oct 10 2019 Jinkyoung Yoo - Pizza and Seminar
by Ku Blanco, Aury Y 04 Oct '19

04 Oct '19

Good afternoon, As we head into the weekend, I'd like to extend an invitation for our next 690 guest speaker. Next Thursday, Oct. 10, 2019 we will be hosting Jinkyoung Yoo of Los Alamos National Lab. A pizza lunch and discussion will be held at noon in ARMS 3109 and will be followed by his seminar presentation at 12:30 pm. If you are interested in having discussion time with him and have not yet reached out to Haiyan, or myself, please do so! Forwarded on behalf of Prof. Haiyan Wang: [cid:image002.png@01D57AC8.81FE6B40] A good weekend to all, Aury Ku Administrative Assistant Purdue University School of Materials Engineering Neil Armstrong Hall of Engineering 765/494-4100 akublanc(a)purdue.edu<mailto:staceyl@purdue.edu> [https://www.purdue.edu/brand/images/Purdue_University-150_Years_of_Giant_Le…]

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MSE 690 Oct 04 2019, 3:30 pm, Vilmali Lopez-Mejias
by Ku Blanco, Aury Y 04 Oct '19

04 Oct '19

Good Morning all, Our guest, Dr. Lopez-Mejias is in the building and is looking forward to seeing you all at the seminar presentation this afternoon! Forwarded on behalf of Prof. Carlos Martinez: [cid:image002.jpg@01D57A9D.6E37EA30] Thank you, Aury Ku Administrative Assistant Purdue University School of Materials Engineering Neil Armstrong Hall of Engineering 765/494-4100 akublanc(a)purdue.edu<mailto:staceyl@purdue.edu> [https://www.purdue.edu/brand/images/Purdue_University-150_Years_of_Giant_Le…]

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Seminar Notice for Nicholas Richter Oct. 10, at 8:30 a.m., in ARMS 3109. " Micropillar Compression Studies of Deformation Behavior in Nanostructured FCC Metals"
by Son, Rosemary E 03 Oct '19

03 Oct '19

Please consider attending the following: MATERIALS ENGINEERING SEMINAR "Micropillar Compression Studies of Deformation Behavior in Nanostructured FCC Metals" By Nicholas A. Richter Purdue MSE Preliminary Exam Advisor: Professor Xinghang Zhang ABSTRACT Nanostructured metals have peaked significant interest for automotive and aerospace applications as they can drastically improve a metal's mechanical properties. These structures, including nanocrystalline and nanotwinned metals, can lead to novel deformation behaviors and a significant improvement of mechanical properties. As both devices (nanowires, NEMS) and microstructural features approach the nanoscale, there is an opportunity to elucidate the mechanisms governing deformation in these systems. Micropillar compression provides an avenue to explore their mechanical behavior. New insight to deformation in nanostructured metals can be gained through in-situ videos of micropillar compression in the SEM, as well as post-compression microstructural analysis using TEM. This review focuses on microcompression of nanostructured face centered cubic (FCC) metals due to the abundance of literature on these systems. It also details possible challenges faced with designing micropillar compression experiments and postcompression analysis. Keywords: Micropillar compression, Size effects, Nanostructured Metals, FCC metals, Micromechanical Testing Date: Thurday, October 10, 2019 Time: 8:30 A.M. Place: ARMS 3109

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Seminar Reminder for Tianyi Sun's Preliminary Exam. Seminar, Monday, October 7, at 8:30 a.m., in ARMS 3115. " Irradiation Induced Microstructural Evolutions in FeCrAl Alloys"
by Son, Rosemary E 03 Oct '19

03 Oct '19

Please consider attending the following: MATERIALS ENGINEERING SEMINAR "Irradiation Induced Microstructural Evolutions in FeCrAl Alloys" By Tianyi Sun Purdue MSE Preliminary Exam Advisor: Professor Xinghang Zhang ABSTRACT Development of advanced nuclear reactors poses significant challenges for structural materials that need to operate under high temperatures, higher pressure, higher irradiation dose, and often corrosive environments. FeCrAl alloy, one class of ferritic steel with high Cr and Al content, is deemed as one of the most promising candidates for accident tolerant applications. Two orders of magnitude lower steam oxidation rate at high temperature (< 1500 °C) than currently used Zirconium based alloys in commercial light water reactors gives FeCrAl alloys a clear edge over many other candidates under accident scenarios. However, long time exposure to radiation generates defect clusters and causes phase separation in FeCrAl alloys accompanied by degradation of mechanical properties, such as radiation-induced hardening and embrittlement. This report examines recent studies on microstructural evolutions in irradiated FeCrAl alloys and point out some future studies that are needed to better understand the mechanisms of radiation damage in FeCrAl alloys and further improve their radiation tolerance. Keywords: FeCrAl alloys, high temperature oxidation, dislocation loop formation, α' phase separation, irradiation hardening Date: Monday, October 7, 2019 Time: 8:30 A.M. Place: ARMS 3115

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Seminar Reminder for Raheleh M. Rahimi's PhD Final Exam. Seminar, Friday Oct 4, at 1:30 p.m., in HAMP 2118. Exam same day, at 2:30 in ARMS 2007. " Micromechanical Analysis and Characterization of Materials with Spatially Distinct Microstructural Featur
by Son, Rosemary E 03 Oct '19

03 Oct '19

Please consider attending the following: MATERIALS ENGINEERING SEMINAR "Micromechanical Analysis and Characterization of Materials with Spatially Distinct Microstructural Features" By Raheleh Mohammad Rahimi Purdue MSE Ph.D. Final Exam Advisor: Professor David F. Bahr ABSTRACT Correlations between materials microstructural properties and mechanical behavior are important for materials development. As materials characterization methods have been restricted to instrument accessibility, sample dimensions and economical aspects, developing functional techniques in order to obtain better understanding of materials behavior in micro and nano scale is crucial. Procedures for assessing and interpreting the mechanical responses at small scales, combined with investigating the microstructure are considered as significant steps to design and develop the effective frameworks for evaluating bulk properties. This research demonstrates that how fundamental understanding of microstructures can assist interpreting of mechanical performance of bulk materials. Testing of materials at small scales is very important because the mechanical failure of any bulk material starts with the formation, extension, or local accumulation of initially small defects, leading finally to a fracture. Thus, any bulk material profits from an in-depth understanding of its deformation and mechanical phenomena at the nano- and micrometer length scale. This thesis shows how the micro constituents' interactions and grain boundaries reactions to dislocations in alloys and thin films contribute to understanding material flow behavior and differences in the mechanical properties of these materials in a wide range of material systems with variations in appropriate sizes which need to be probed. Among other things, this work shows that sources of variation can be specified and quantified as predictive tools for designing materials. The strength and strain hardening of martensite and ferrite in a dual phase steel with a grain size less than 5 μm were determined using an inverse technique. The yield strengths of the ferrite and martensite phases are calculated as 370 MPa and 950 MPa respectively. The calculated hardening exponent of the alloy was exactly same as tensile test result (0.11). The constrain phenomena was obviously effective in deformation of this elastic-plastic alloy. Also the differences in hardness and pop-in behavior were used to understand of the influences of different types of grain boundaries, high density dislocations, and twins in Al thin films before and after plasticity. Date: Friday, October 4, 2019 Time: 1:30 P.M. Place: HAMP 2118

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MSE 690 Oct 10 2019 Jinkyoung Yoo - Faculty Meetings
by Ku Blanco, Aury Y 01 Oct '19

01 Oct '19

Hi all, Once more I am reaching out seeking interested participants in meeting with an upcoming guest. I invite you to review the notice below and check your calendars for this day! We will be setting up meetings on Thursday, October 10th from 9:30-11:30 am and again from about 2-4 pm. Please let me know if you or any of your students are interested in a time. [cid:image002.png@01D57864.3E0E87A0] Thank you, Aury Ku Administrative Assistant Purdue University School of Materials Engineering Neil Armstrong Hall of Engineering 765/494-4100 akublanc(a)purdue.edu<mailto:staceyl@purdue.edu> [https://www.purdue.edu/brand/images/Purdue_University-150_Years_of_Giant_Le…]

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