The respective hardening contributions of dislocations and twins to the flow stress of a twinning-induced plasticity steel
The respective hardening contributions of dislocations and twins to the flow stress of a twinning-induced plasticity steel
复制标题
位错和孪晶各自的硬化对孪生塑性钢流变应力的贡献
DOI：
10.1016/j.scriptamat.2015.09.003
复制
发表时间：
2016-02-01
影响因子：
6
通讯作者：
Huang, M. X.
中科院分区：
文献类型：
--
作者：
Liang, Z. Y.;Li, Y. Z.;Huang, M. X.
孪生诱发塑性(TWIP)钢中的形变孪晶在文献中被认为是背应力和运动硬化的来源，而背应力和运动硬化对流动应力有很大贡献。然而，目前的工作表明孪晶对流动应力的贡献是有限的。相反，在目前的TWIP钢中，位错通过森林硬化，占屈服后流动应力增量的高达90%。换言之，位错演化控制了TWIP钢的加工硬化速率。(C)2015爱思唯尔有限公司。保留所有权利。
Deformation twins in twinning-induced plasticity (TWIP) steels have been considered in the literature as the source of back stress and kinematic hardening, which contribute considerably to the flow stress. Nevertheless, it is demonstrated in the present work that the contribution of twins to the flow stress is limited. Instead, dislocations, via forest hardening, account for up to similar to 90% of the flow stress increment after yielding in the present TWIP steel. In other words, dislocation evolution dominates the work-hardening rate of TWIP steels. (C) 2015 Elsevier Ltd. All rights reserved.