Effects of Welding Processes and Post-Weld Aging Treatment on Fatigue Behavior of AA2219 Aluminium Alloy Joints

被引：26

作者：

Malarvizhi, S. ^{[1
]}

Balasubramanian, V. ^{[1
]}

机构：

[1] Annamalai Univ, Dept Mfg Engn, Ctr Mat Joining & Res CEMAJOR, Annamalainagar 608002, Tamil Nadu, India

来源：

JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE | 2011年 / 20卷 / 03期

关键词：

AA2219 aluminium alloy; electron beam welding; fatigue properties; friction stir welding; gas tungsten arc welding; post-weld aging treatment; MICROSTRUCTURE; MG;

D O I：

10.1007/s11665-010-9682-5

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 fabricated joints were post-weld aged at 175 A degrees C for 12 h. The effect of three welding processes and post-weld aging (PWA) treatment on the fatigue properties is reported. 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 post-weld aged FSW joints showed superior fatigue performance compared to EBW and GTAW joints. This was mainly due to the formation of very fine, dynamically recrystallized grains and uniform distribution of fine precipitates in the weld region.

引用

页码：359 / 367

页数：9

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