文献类型：期刊文献

英文题名：Effects of temperature on tensile and impact behavior of dissimilar welds of rotor steels

作者：Zhu, Ming-Liang[1];Xuan, Fu-Zhen[1]

机构：[1]E China Univ Chem Technol, Sch Mech Engn, MOE, Key Lab Safety Sci Pressurized Syst, Shanghai 200237, Peoples R China

年份：2010

卷号：31

期号：7

起止页码：3346

外文期刊名：MATERIALS & DESIGN

收录：;EI(收录号：20102212963236);WOS:【SCI-EXPANDED(收录号:WOS:000278442000026)】；

基金：The authors are grateful for the supports provided by National Natural Science Foundations of China (50 835 003, 10 972 078). FZ would also wish to thank the Research Fund for Doctoral Program of Higher Education (200 802 510 003) and Natural Science Foundation of Shanghai (09JC1404400).

语种：英文

外文关键词：Dissimilar welding; Tensile; Temperature; Rotor steels

摘要：Tensile and impact behavior of dissimilar weld joints of newly developed rotor steels 23CrMoNiWV88 and 26NiCrMoV145 were conducted at various temperatures below 350 degrees C. Inhomogeneous microstructures and asymmetrical micro-hardness along the dissimilar welding joint were observed. With the increase of temperature, strength decreased which was associated with the increased plasticity, and fracture location changed from weld metal (WM) to intermediate pressure (IP) base metal (BM) at around 300 degrees C. Compared to the homogeneous impact specimen with two fracture zones at fracture surface, a combined quasi-cleavage and ductile fracture mode with three zones is observed at the fracture surface of the dissimilar weld joint when the testing temperature is in the range of 0-40 degrees C. The occurrence of separated zones are mainly ascribed to the multi-layer welding process and thus improved the impact toughness of the welding joint. (c) 2010 Elsevier Ltd. All rights reserved.