文献类型：期刊文献

英文题名：Local mechanical properties of a dissimilar metal welded joint in nuclear power systems

作者：Wang, H. T.[1];Wang, G. Z.[1];Xuan, F. Z.[1];Liu, C. J.[1];Tu, S. T.[1]

机构：[1]E China Univ Sci & Technol, Key Lab Pressure Syst & Safety, Minist Educ, Shanghai 200237, Peoples R China

年份：2013

卷号：568

起止页码：108

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

收录：;EI(收录号：20131416170603);WOS:【SCI-EXPANDED(收录号:WOS:000317157500015)】；

基金：This work was financially supported by the Projects of the National Natural Science Foundation of China (51075149), the National Key Technology R&D Program of the Ministry of Science and Technology (2011BAK06B02-04), the National High Technology Research and Development Program of China (2012AA040103), and the Fundamental Research Funds for the Central Universities of China.

语种：英文

外文关键词：Local mechanical properties; Dissimilar metal welded joint; Microstructure; Integrity assessment; Nuclear power system

摘要：In this paper, the local mechanical properties (yield/ultimate strength, ductility as well as stress strain curves) of an Alloy52M dissimilar metal welded joint (DMWJ) in nuclear power systems were determined by using the mini-sized flat tensile specimens, and the local microstructures in the joint were characterized and analyzed. The results show that there are drastic variations in the local mechanical properties in the interface regions between materials. The heterogeneous mechanical properties are mainly related to the local microstructures of the DMWJ. The complex microstructures in the interface regions between materials were mainly caused by the heat flow and element migration during welding process. The local mechanical properties and their mismatches may have significant effect on crack-tip fracture mechanics parameter, plastic deformation behavior, local fracture resistance and crack growth behavior. Therefore, they need to be obtained and used in the integrity assessment of the DMWJs. (C) 2013 Elsevier B.V. All rights reserved.