文献类型：期刊文献

英文题名：Effects of low-temperature transformation and transformation-induced plasticity on weld residual stresses: Numerical study and neutron diffraction measurement

作者：Jiang, Wenchun[1];Chen, Wei[1];Woo, Wanchuck[2];Tu, Shan-Tung[3];Zhang, Xian-Cheng[3];Em, Vyacheslav[4]

机构：[1]China Univ Petr East China, Coll Chem Engn, State Key Lab Heavy Oil Proc, Qingdao 266580, Peoples R China;[2]Korea Atom Energy Res Inst, Neutron Sci Div, Daejeon 305353, South Korea;[3]East China Univ Sci & Technol, Sch Mech & Power Engn, Key Lab Pressure Syst & Safety MOE, Shanghai 200237, Peoples R China;[4]NRC Kurchatov Inst, Neutron Res Dept, 1 Akad Kurchatova Pl, Moscow, Russia

年份：2018

卷号：147

起止页码：65

外文期刊名：MATERIALS & DESIGN

收录：;EI(收录号：20181204926708);WOS:【SCI-EXPANDED(收录号:WOS:000429307200008)】；

基金：We would like to thank the support from National Natural Science Foundation of China (51575531), Taishan Scholar Construction Funding (ts201511018) and Natural Science Foundation for Distinguished Young Scholars (JQ201417) of Shandong Province and Fundamental Research Funds for the Central Universities (15CX08006A and 17CX05019).

语种：英文

外文关键词：Weld residual stress; Low-temperature transformation; Transformation-induced plasticity

摘要：In this study, the weld residual stresses (RS) in a 25 mm thick ferrite steel plate with newly developed low-temperature transformation (LTT) welding wire were investigated by finite element method and neutron diffraction (ND) measurement. A thermo-elastic-plastic finite element model coupled with solid-state phase transformation (SSPT) was developed to investigate the distribution and formation mechanism of RS, which has been verified by ND measurement. The results demonstrate that the developed LTT alloy can significantly reduce the RS and even generate compressive RS in the weld zone, due to the interrupted cooling shrinkage caused by the LTT. The higher inter-pass temperatures related to the microstructure evolution result in an increased region of compressive stress within the weldment. Moreover, the longitudinal RS in the weld zone gradually changes to tension as the initial temperature of martensitic transformation increases. Notably, the relaxation effect of transformation-induced plasticity on RS and its influence on model accuracy were discussed. (C) 2018 Elsevier Ltd. All rights reserved.