期刊
SCRIPTA MATERIALIA
卷 181, 期 -, 页码 35-42出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2020.02.001
关键词
Plastic instability; Strain hardening; Metallic materials; Deformation mode; Mechanical activation
类别
资金
- Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan [JPMXP01121010 0 0]
- JST CREST [JPMJCR1994]
Based on recent findings in ultrafine grained metals, we proposed a strategy for overcoming the strength-ductility trade-off in structural metallic materials. Sequential nucleation of different deformation modes, such as unusual slip systems, deformation twinning, martensitic transformation, etc., would regenerate strain-hardening ability of the material, leading to high strength and large tensile ductility. For discussing the activation of different deformation modes in atomistic scales, the concept of plaston which considered local excitation of atoms under singular dynamic fields was proposed. (C) 2020 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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