Strategy for managing both high strength and large ductility in structural materials-sequential nucleation of different deformation modes based on a concept of plaston
Strategy for managing both high strength and large ductility in structural materials-sequential nucleation of different deformation modes based on a concept of plaston
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DOI：
10.1016/j.scriptamat.2020.02.001
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发表时间：
2020-05-01
影响因子：
6
通讯作者：
Du, Jun-Ping
中科院分区：
文献类型：
--
作者：
Tsuji, Nobuhiro;Ogata, Shigenobu;Du, Jun-Ping
根据超细晶粒金属的最新发现，我们提出了一种克服结构金属材料强度与延展性权衡的策略。不同变形模式的相继形核，如异常滑移系、变形孪晶、马氏体转变等，会重新产生材料的应变硬化能力，从而获得高强度和大的拉伸塑性。为了讨论原子尺度上不同变形模式的激活，提出了考虑奇异动态场下原子局部激发的质子概念。 (C) 2020 Acta Materialia Inc. 由 Elsevier Ltd 出版。保留所有权利。
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.