文献类型：期刊文献

英文题名：An experimental investigation of in-plane constraint effect on local fracture resistance of a dissimilar metal welded joint

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

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

年份：2014

卷号：53

起止页码：611

外文期刊名：MATERIALS & DESIGN

收录：;EI(收录号：20133516671328);WOS:【SCI-EXPANDED(收录号:WOS:000326805500077)】；

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：In-plane constraint; Local fracture resistance; Dissimilar metal welded joint; Fracture mechanism; Safety design

摘要：In this paper, an experimental investigation on effect and mechanism of in-plane constraint induced by crack depth on local fracture resistance of two cracks (A508 heat-affected-zone (HAZ) crack and A508/Alloy52Mb interface crack) located at the weakest region in an Alloy52M dissimilar metal welded joint (DMWJ) between A508 ferritic steel and 316L stainless steel in nuclear power plants has been carried out. The results show that the local fracture resistance of the two cracks is sensitive to in-plane constraint. With increasing in-plane constraint (crack depth a/W), the fracture mechanism of the two cracks changes from ductile fracture through mixed ductile and brittle fracture to brittle fracture, and the corresponding crack growth resistance decreases. The crack growth path in the specimens with different in-plane constraints deviates to low-strength material side, and is mainly controlled by local strength mismatch, rather than toughness mismatch. For accurate and reliable safety design and failure assessment of the DMWJ structures, it needs to consider the effects of in-plane constraint on fracture mechanism and local fracture resistance. The new safety design and failure assessment methods incorporating constraint effect need to be developed for the DMWJ structures. (C) 2013 Elsevier Ltd. All rights reserved.