Effects of temperature on tensile and impact behavior of dissimilar welds of rotor steels

被引：59
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
来源：
MATERIALS & DESIGN | 2010年 / 31卷 / 07期
基金：
上海市自然科学基金;
关键词：
Dissimilar welding; Tensile; Temperature; Rotor steels; STAINLESS-STEEL; ALUMINUM-ALLOY; DELTA-FERRITE; FRACTURE; JOINTS; MICROSTRUCTURE; TOUGHNESS; STRESS; CRACKS;
D O I：
10.1016/j.matdes.2010.01.055
中图分类号：
T [工业技术];
学科分类号：
08 ;
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.
引用
收藏
页码：3346 / 3352
页数：7
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