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On tension-compression asymmetry in ultrafine-grained and nanocrystalline metals
Date
2010-12-01
Author
Gürses, Ercan
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We present present a physically motivated computational study explaining the tension/compression (T/C) asymmetry phenomenon in nanocrystalline (nc) and ultrafine-grained (ufg) face centered cubic (fcc) metals utilizing a variational constitutive model where the nc-metal is modeled as a two-phase material consisting of a grain interior phase and a grain boundary affected zone (GBAZ). We show that the existence of voids and their growth in GBAZ renders the material pressure sensitivity due to porous plasticity and that the utilized model provides a physically sound mechanism to capture the experimentally observed T/C asymmetry in nc- and ufg-metals.
Subject Keywords
General Physics and Astronomy
,
General Materials Science
,
General Computer Science
,
Mechanics of Materials
,
General Chemistry
,
Computational Mathematics
URI
https://hdl.handle.net/11511/42707
Journal
COMPUTATIONAL MATERIALS SCIENCE
DOI
https://doi.org/10.1016/j.commatsci.2010.09.028
Collections
Department of Aerospace Engineering, Article
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BibTeX
E. Gürses, “On tension-compression asymmetry in ultrafine-grained and nanocrystalline metals,”
COMPUTATIONAL MATERIALS SCIENCE
, pp. 639–644, 2010, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/42707.