期刊
MATERIALS & DESIGN
卷 36, 期 -, 页码 379-390出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.matdes.2011.10.054
关键词
Welding; Mechanical; Fractography
资金
- Indian Institute of Technology, Indore
- DST, Govt. of India [SR/S3/MERC/005/2009]
- MHRD, Govt. of India
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.
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