文献类型：期刊文献

英文题名：Evaluation of the microstructure related strength of CrMoV weldment by using the in-situ tensile test of miniature specimen

作者：Yang, Bin[1,2];Xuan, Fu-Zhen[2];Chen, Jing-Kai[3]

机构：[1]China Univ Petr East China, State Key Lab Heavy Oil Proc, Coll Chem Engn, Qingdao 266580, Peoples R China;[2]East China Univ Sci & Technol, Key Lab Pressure Syst & Safety, Minist Educ, Sch Mech & Power Engn, Shanghai 200237, Peoples R China;[3]China Univ Petr East China, Coll Mech & Elect Engn, Qingdao 266580, Peoples R China

年份：2018

卷号：736

起止页码：193

外文期刊名：MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING

收录：;EI(收录号：20183705795261);WOS:【SCI-EXPANDED(收录号:WOS:000447573400020)】；

基金：Supports from National Natural Science Foundation of China (Grants No.: 51475167, 51605165), Qingdao Postdoctoral Applied Research Project (Grants No: BY20170211), the Fundamental Research Funds for the Central Universities (Grants No: 18CX02149A), UPC project (Grants No: YJ20170018), are greatly acknowledged.

语种：英文

外文关键词：Welded joint; Miniature specimen; Nonhomogeneous microstructure; In-situ tensile test

摘要：The evolution of grain size and structure morphology across the CrMoV welded joint were investigated. The tensile properties of subzones in the weldment were measured by miniature specimens. And the measured results were compared to the results acquired from the standard round bar specimen. It is found that the strength characterized by miniature specimen is lower than that obtained by standard specimen. The deviation of strength is acceptable. However, the measured Young's modulus is not consistent with the elastic modulus of standard specimen, due to the jig deformation and clamped effects of the miniature specimen. Although HAZ is the weakest location due to the deteriorated microstructure and the reduced strength, the failure pattern is different comparing the measured results of the miniature specimen and that of the standard round bar cross-weld specimen. For the miniature specimen, fracture occurred at the HAZ region close to the base metal (BM). However, the fracture of the standard specimen occurred in the BM instead of the HAZ region. The difference is ascribed to the different constraints of specimens with various geometric dimension.