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Meeting 2017 TMS Annual Meeting & Exhibition
Symposium The John Cahn Memorial Symposium
Presentation Title Experimental Measures of Stress-coupled Boundary Migration and the Attendant Mechanical Behavior of Nanocrystalline Films
Author(s) Paul Rottmann, Suman Dasgupta, Kevin Hemker
On-Site Speaker (Planned) Suman Dasgupta
Abstract Scope Stress-coupled grain boundary migration has been shown to trigger microstructural instability and accommodate plastic deformation in a wide number of nanocrystalline metals. The role of shear stress in promoting grain growth has been identified, but detailed information about local grain orientation and grain boundary character have been harder to obtain. TEM-based precession-assisted automated crystal orientation mapping (ACOM) now allows for nanoscale mapping of individual grains and grain boundaries. In situ mechanical tests, couypled with orientation mapping, have been used to make quantitative observations about twin formation, grain and twin boundary migration, and crack growth. The ability to observe and correlate these mechanisms with local orientation mapping, greatly facilitates comparisons with computer simulations and promotes better understanding of underlying deformation processes.
Proceedings Inclusion? Undecided

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

A DSC Model for Grain Boundary Migration and Properties
Beyond the Gorsky Effect – Exploring Larché-Cahn Open System Elasticity in Experiment
Dislocations, Trijunctions and Grain Rotation
Energetic Trends for Twin Boundaries in HCP Metals
Experimental Measures of Stress-coupled Boundary Migration and the Attendant Mechanical Behavior of Nanocrystalline Films
How Some Quasicrystals Might Grow
John Cahn's Boss, Really?
John Cahn and Aesthetics of Materials
Molecular Dynamics Simulations of Faceted, Incoherent Twin Boundaries
Phase Transition and Anomalous Diffusion in Metastable β Ti-Mo
Quasi-history of Quasi-crystallinity
Thin Film Grain Growth for Twin Related Orientations of Grains

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