期刊
ACTA MATERIALIA
卷 133, 期 -, 页码 303-315出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.actamat.2017.04.050
关键词
Kink band; Digital image correlation; Anisotropy; Multilayers; Deformation band
资金
- UC office of the President, UC Lab Fees Research Program [12-LR-238091]
- Department of Defense through the National Defense Science & Engineering Graduate Fellowship (NDSEG) Program
- LANL Laboratory Directed Research and Development (LDRD) [20140348ER]
- U.S. Department of Energy [DE-AC52-06NA25396]
Kink band formation is a common deformation mode for anisotropic materials and has been observed in polymer matrix fiber composites, single crystals, geological formations, and recently in metallic nano laminates. While numerous studies have been devoted to kink band formation, the majority do not consider the often rapid and unstable process of kink band propagation. Here we take advantage of stable kink band formation in Cu-Nb nanolaminates to quantitatively map the local strain fields surrounding a propagating kink band during uniaxial compression. Kink bands are observed to initiate at specimen edges, propagate across the sample during a rising global stress, and induce extended strain fields in the non-kinked material surrounding the propagating kink band. It is proposed that these stress/strain fields significantly contribute to the total energy dissipated during kinking and, analogous to crack tip stress/strain fields, influence the direction of kink propagation and therefore the kink band inclination angle. Published by Elsevier Ltd on behalf of Acta Materialia Inc.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据