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Up-Hill Diffusion of Solute Atoms Towards Slipped Grain Boundaries: A Possible Reason of Decomposition Due to Severe Plastic Deformation
14 Pages Posted: 15 Apr 2020 Publication Status: Accepted
Abstract
Supersaturated solid solutions subjected to severe plastic deformation often exhibit decomposition of the microstructure, leading to a peculiar grain boundary phenomenon, the formation of few nanometer thin layer enriched in solute atoms along grain boundaries. Based on localized grain boundary sliding, this phenomenon can be explained by the formation of hydrostatic stress field, which induces up-hill diffusion in the solute atmosphere, resulting in solute atom accumulation along the stressed grain boundaries.
Keywords: plastic deformation, grain boundaries, diffusion, grain boundary wetting
Suggested Citation: Suggested Citation
Kovács, Zsolt and Chinh, Nguyen Q., Up-Hill Diffusion of Solute Atoms Towards Slipped Grain Boundaries: A Possible Reason of Decomposition Due to Severe Plastic Deformation. Available at SSRN: https://ssrn.com/abstract=3567464 or http://dx.doi.org/10.2139/ssrn.3567464
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