Correlation between microstructure, hardness and strength in HAZ of dissimilar welds of rotor steels

被引：98
作者：
Zhu, Ming-Liang [1 ]
Xuan, Fu-Zhen [1 ]
机构：
[1] E China Univ Sci & Technol, Sch Mech Engn, MOE, Key Lab Safety Sci Pressurized Syst, Shanghai 200237, Peoples R China
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2010年 / 527卷 / 16-17期
基金：
上海市自然科学基金;
关键词：
Nano-hardness; Micro-hardness; Strength distribution; HAZ; STAINLESS-STEEL; ALUMINUM-ALLOY; PARAMETERS; TI-6AL-4V; FRACTURE; STRESS; JOINTS; CRACKS;
D O I：
10.1016/j.msea.2010.03.066
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Correlation between microstructure, hardness and strength was investigated in heat affected zone (HAZ) of dissimilar welding joints of newly developed rotor steels in terms of both the traditional micro-hardness testing and the nanoindentation technique. Relationships between micro-hardness and nano-hardness were obtained for HAZ of welds, where the mechanical properties were microstructure dependent. Lath width of the tempered martensites was selected as the characteristic microstructure size for correlating the micro-hardness. The detailed strength distribution in HAZ and the correlation with the characteristic microstructure size were discussed. A good agreement was observed for the correlated strength and the experimental results in both weld metal (WM) and base metal (BM), and therefore gave us confidence for the application of the proposed relationship between the hardness and the mechanical properties in HAZ of the dissimilar weld. (C) 2010 Elsevier B.V. All rights reserved.
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收藏
页码：4035 / 4042
页数：8
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