文献类型：期刊文献

英文题名：Fracture location transition in constant load tests of a NiCrMoV steel welded joint

作者：Weng, Shuo[1];Huang, Yuhui[2];Xuan, Fuzhen[2];Zheng, Songlin[1,3]

机构：[1]Univ Shanghai Sci & Technol, Sch Mech Engn, Shanghai 200093, Peoples R China;[2]East China Univ Sci & Technol, Sch Mech & Power Engn, Shanghai 200237, Peoples R China;[3]Univ Shanghai Sci & Technol, Machinery Ind Key Lab Mech Strength & Reliabil Ev, Shanghai 200093, Peoples R China

年份：2019

卷号：181

外文期刊名：MATERIALS & DESIGN

收录：;EI(收录号：20193107253619);WOS:【SCI-EXPANDED(收录号:WOS:000487763800059)】；

基金：The work was supported by the National Natural Science Foundation of China (Grant No. 51835503 and 51875202) and Shanghai Sailing Program (19YF1434400).

语种：英文

外文关键词：Welded joint; Constant load test; Fracture location transition

摘要：The fracture location transition of the NiCrMoV steel welded joints induced by different tensile loads has been investigated through the constant load tests in 3.5 wt% NaCl at 180 degrees C. The mechanical properties of different zones in the welded joints were measured by the hardness measurement and localized tensile tests in air at room temperature. The corrosion properties were characterized by potentiodynamic polarization curve tests and scanning vibrating electrode technique (SVET) tests. The results reveal that the most susceptive corrosion zone and the weakest strength zone do not locate in same zone of the welded joint. This mismatch leads to the rupture locations of the welded joints change with the applied load in the constant load tests. For the applied load larger than or equal to 765 MPa, the rupture section locates in the middle of WM due to its weakest strength. But the fracture position shifts to the fusion zone for the applied load less than or equal to 760 MPa, which is attributed to stress corrosion cracking (SCC) originating from the pits under the combined effect of galvanic and stress-assisted corrosion. (C) 2019 The Authors. Published by Elsevier Ltd.