文献类型：期刊文献

英文题名：Fracture toughness of welded joints for duplex stainless steels

作者：Wang, J.W.[1]; Wang, Q.Q.[1]; Guan, K.S.[1]; Tu, S.D.[1]

机构：[1] School of mechanical and power engineering, East China University of Science and Technology, P.O. Box 401, Shanghai, 200237, China

年份：2017

卷号：2

起止页码：1012

外文期刊名：ICF 2017 - 14th International Conference on Fracture

收录：EI(收录号：20192206974163)

语种：英文

外文关键词：Unloading - Welds - Stainless steel - Crack propagation - Welding - Fracture testing

摘要：Fracture toughness of welded joints for SAF2205 and SAF2507 was investigated by the Normalization method and the unloading compliance method. J-resistance curves obtained by the above methods have a very high coincidence when the length of crack propagation is less than 0.5mm, which makes known that fracture toughness of DSS can be gained accurately by the Normalization method. But with the increase of crack growth, the difference between the two curves is more remarkable. During fracture toughness testing, the splitting phenomenon often occurs. The splitting cracks cleave before steady ductile tearing extension. The existence of the splitting phenomenon leads to loss of constrains and makes ductile tearing extension take place, which improves fracture toughness. So the fracture toughness of the poorest HAZ decreases little compared with base and weld metal. ? 2017 Chinese Society of Theoretical and Applied Mechanics. All Rights Reserved.