Effect of welding parameters on microstructure and mechanical properties of friction stir welded joints of AA7039 aluminum alloy

被引：144
作者：
Sharma, Chaitanya [1 ]
Dwivedi, Dheerendra Kumar [1 ]
Kumar, Pradeep [1 ]
机构：
[1] IIT Roorkee, Mech & Ind Engn Dept, Roorkee 247667, Uttarkhand, India
来源：
MATERIALS & DESIGN | 2012年 / 36卷
关键词：
Welding; Mechanical; Fractography; FATIGUE; DEFECT;
D O I：
10.1016/j.matdes.2011.10.054
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A high strength Al-Zn-Mg alloy AA7039 was friction stir welded by varying welding and rotary speed of the tool in order to investigate the effect of varying welding parameters on microstructure and mechanical properties. The friction stir welding (FSW) process parameters have great influence on heat input per unit length of weld, hence on temperature profile which in turn governs the microstructure and mechanical properties of welded joints. There exits an optimum combination of welding and rotary speed to produce a sound and defect free joint with microstructure that yields maximum mechanical properties. The mechanical properties increase with decreasing welding speed/increasing rotary speed i.e. with increasing heat input per unit length of welded joint. The high heat input joints fractured from heat affected zone (HAZ) adjacent to thermo-mechanically affected zone (TMAZ) on advancing side while low heat input joints fractured from weld nugget along zigzag line on advancing side. (C) 2011 Elsevier Ltd. All rights reserved.
引用
收藏
页码：379 / 390
页数：12
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