Fatigue crack growth resistance of gas tungsten arc, electron beam and friction stir welded joints of AA2219 aluminium alloy

被引：56
|
作者：
Malarvizhi, S. [1 ]
Balasubramanian, V. [1 ]
机构：
[1] Annamalai Univ, Ctr Mat Joining & Res CEMAJOR, Dept Mfg Engn, Annamalainagar 608002, Tamil Nadu, India
来源：
MATERIALS & DESIGN | 2011年 / 32卷 / 03期
关键词：
Non-ferrous metals and alloys; Welding; Fatigue; Fractography; BEHAVIOR; MICROSTRUCTURE;
D O I：
10.1016/j.matdes.2010.10.019
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
AA2219 aluminium alloy square butt joints without filler metal addition were fabricated using gas tungsten arc welding (GTAW), electron beam welding (EBW) and friction stir welding (FSW) processes. The effect of three welding processes on fatigue crack growth behaviour is reported in this paper. Transverse tensile properties of the welded joints were evaluated. Microstructure analysis was also carried out using optical and electron microscopes. It was found that the FSW joints are exhibiting superior fatigue crack growth resistance compared to EBW and GTAW joints. This was mainly due to the formation of very fine, dynamically recrystallised grains and uniform distribution of fine precipitates in the weld region. (C) 2010 Elsevier Ltd. All rights reserved.
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页码：1205 / 1214
页数：10
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