文献类型：期刊文献

英文题名：Experimental insight into the cyclic softening/hardening behavior of austenitic stainless steel using ultrasonic higher harmonics

作者：Zhang, Jianfeng[1];Xuan, Fu-zhen[1];Xiang, Yanxun[1];Zhao, Peng[1]

机构：[1]E China Univ Sci & Technol, MOE Key Lab Pressurized Syst & Safety, Sch Mech & Power Engn, Shanghai 200237, Peoples R China

年份：2014

卷号：108

期号：4

外文期刊名：EPL

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000346355000018)】；

基金：The authors are grateful for the support provided by the National Science Foundation of China (51325504).

语种：英文

摘要：The correlation of cyclic hardening/softening behavior of 304 stainless steel (SS) was investigated using nonlinear ultrasonic wave technique. Results reveal that primary hardening leads to the increase of acoustic nonlinearity, while secondary hardening causes the reverse tendency. This distinct phenomenon is governed by two competitive mechanisms: in the primary-hardening stage, the ascended acoustic nonlinearity is related to the increase of planar dislocation structures. While in the second-hardening stage, the decrease of acoustic nonlinearity is partly caused by the development of cell structures. In addition, the deformation-induced martensitic transformation also contributes to the increase of acoustic nonlinearity under higher stress amplitudes. Copyright (C) EPLA, 2014