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Investigating the Mechanical Behavior and Deformation Mechanisms of Ultrafine-grained Metal Films Using Ex-situ and In-situ TEM Techniques


Abstract Nanocrystalline (NC) and Ultrafine-grained (UFG) metal films exhibit a wide range of enhanced mechanical properties compared to their coarse-grained counterparts. These properties, such as very high strength, primarily arise from the change in the underlying deformation mechanisms. Experimental and simulation studies have shown that because of the small grain size, conventional dislocation plasticity is curtailed in these materials and grain boundary mediated mechanisms become more important. Although the deformation behavior and the underlying mechanisms in these materials have been investigated in depth, relatively little attention has been focused on the inhomogeneous nature of their microstructure (particularly originating from the text... (more)
Created Date 2017
Contributor Izadi, Ehsan (Author) / Rajagopalan, Jagannathan (Advisor) / Peralta, Pedro (Committee member) / Chawla, Nikhilesh (Committee member) / Solanki, Kiran (Committee member) / Oswald, Jay (Committee member) / Arizona State University (Publisher)
Subject Materials Science / Mechanical engineering / Nanotechnology / ACOM / In-situ TEM / Mechanical behavior / MEMS / Nano-mechanical testing / Thin metal films
Type Doctoral Dissertation
Extent 121 pages
Language English
Copyright
Reuse Permissions All Rights Reserved
Note Doctoral Dissertation Mechanical Engineering 2017
Collaborating Institutions Graduate College / ASU Library
Additional Formats MODS / OAI Dublin Core / RIS


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Description Dissertation/Thesis