BEGIN:VCALENDAR VERSION:2.0 PRODID:-//Memento EPFL// BEGIN:VEVENT SUMMARY:IMX Seminar Series - Nanotwinned Metal MEMS with an Impressive Sui te of Properties DTSTART:20210503T131500 DTEND:20210503T141500 DTSTAMP:20260415T082957Z UID:b582225b8c3bd3ad9faf5b0172b43ab9c4cf7ad4413e9e116891479f CATEGORIES:Conferences - Seminars DESCRIPTION:Prof. Kevin Hemker\, Johns Hopkins University\, USA\nThe focus on nanoscience has greatly advanced our ability to synthesize\, character ize\, and model nanomaterials with unprecedented physical and chemical pro perties that are derived from dimensional constraints. However\, challenge s in bridging nano- to mesoscale fabrication and microstructural instabili ties present serious obstacles to the widespread commercialization of stru ctural nanomaterials. Sputter deposited nanotwinned NiMoW films have been shown to possess ultrahigh mechanical strength\, extreme anisotropic plast icity\, low electrical resistivity\, low thermal expansion\, and much need ed thermal and mechanical microstructural stability. Here we report on exp eriments to elucidate the fundamental deformation mechanisms that underpin the extreme strength and highly anisotropic deformation of nanotwinned Ni MoW. Related efforts involving the fabrication of freestanding microcantil ever arrays with the dimensional stability required for next generation me tal microelectromechanical systems (MEMS) and IoT technologies will also b e discussed.\nBio: Kevin Hemker is the Alonzo G. Decker Chair and Professo r of Mechanical Engineering at Johns Hopkins University and holds joint ap pointments in the Departments of Materials Science & Engineering and Earth & Planetary Sciences.  He earned a BS in metallurgy from the University of Cincinnati\, MS and PhD degrees in materials science and engineering fr om Stanford University\, and completed a postdoctoral fellowship in physic s at the Ecole Polytechnique Federale de Lausanne. He joined the faculty a t Johns Hopkins University in 1993\, was an NSF National Young Investigato r (1994)\, an invited Professor at the EPFL (1995) and the University of P aris XIII (2001)\, and received the ASM Materials Science Research Silver Medal in 2001. He served as Chair of the Department of Mechanical Engineer ing (2007-2013) and editor of Scripta Materialia (2004-2011). Hemker was a member and Vice-Chair of the DARPA Defense Science Research Council (2010 -2014)\, a member of the SRI Technology Council (2017-2019) and was the 20 18 President of The Minerals\, Metals\, Materials Society (TMS).  He is c urrently a member of the HRL Technical Advisory Group and the NCMS AMMP Ad visory Council. Hemker has been named Fellow of AAAS\, ASME\, ASM Internat ional and TMS.\n\nHemker has mentored over 75 postdoctoral fellows\, docto ral and masters students since coming to Hopkins\, about 20 of whom now ha ve tenured or tenure-track academic positions in major research universiti es.  His group strives to elucidate the underlying atomic-level details t hat govern the mechanical response\, performance and reliability of dispar ate material systems.  They have made key observations and discoveries th at have challenged the way the community thinks about and understands mate rials behavior in: additive manufacturing\, nanocrystalline materials\, ma terials for MEMS\, metallic micro-lattices\, thermal barrier coatings for satellites and gas turbines\, armor ceramics\, extreme environments\, and high temperature structural materials in general.  The results of their r esearch have been disseminated in approximately 250 scientific articles\, 4 co-edited books and hundreds of invited presentations and plenary lectur es. LOCATION:https://epfl.zoom.us/j/95940364570 STATUS:CONFIRMED END:VEVENT END:VCALENDAR