Microstructure and Strain Hardening of a Friction Stir Welded High-Strength Al-Zn-Mg Alloy

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	Microstructure and Strain Hardening of a Friction Stir Welded High-Strength Al-Zn-Mg Alloy
	A. H. Feng; D. L. Chen; Z. Y. Ma; W. Y. Ma; R. J. Song
	2014
发表期刊	Acta Metallurgica Sinica-English Letters
ISSN	1006-7191
卷号	27 期号:4 页码:723-729
摘要	Microstructural evolution and strain hardening behavior of a friction stir welded (FSWed) high-strength 7075Al-T651 alloy were evaluated. The nugget zone was observed to consist of fine and equiaxed recrystallized grains with a low dislocation density and free of original precipitates, but containing uniformly distributed dispersoids. The strength, joint efficiency, and ductility of the FSWed joints increased with increasing welding speed. A joint efficiency of similar to 91% was achieved at a welding speed of 400 mm/min and rotational rate of 800 r/min, while the ductility. remained basically the same as that of the base metal. There was no obvious strain rate sensitivity observed in both base metal and welded joints. While both the base metal and FSWed joints exhibited stage III and IV hardening characteristics, the hardening capacity, strain hardening exponent, and strain hardening rate all increased after friction stir welding.
部门归属	[feng, a. h. ; song, r. j.] tongli univ, sch mat sci & engn, shanghai 200092, peoples r china. [feng, a. h. ; ma, w. y.] harbin inst technol, sch mat sci & engn, state key lab adv welding prod technol, harbin 150001, peoples r china. [chen, d. l.] ryerson univ, dept mech & ind engn, toronto, on m5b 2k3, canada. [ma, z. y.] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china. ; chen, dl (reprint author), ryerson univ, dept mech & ind engn, toronto, on m5b 2k3, canada. ; aihanfeng@tongji.edu.cn ; dchen@ryerson.ca
关键词	Aluminum Alloy Friction Stir Welding Mechanical Properties Strain Hardening Az31b Magnesium Alloy Mechanical-properties Tensile Properties Aluminum-alloys Welding Parameters Behavior Evolution Copper Joints
URL	查看原文
语种	英语
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/73224
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	A. H. Feng,D. L. Chen,Z. Y. Ma,et al. Microstructure and Strain Hardening of a Friction Stir Welded High-Strength Al-Zn-Mg Alloy[J]. Acta Metallurgica Sinica-English Letters,2014,27(4):723-729.
APA	A. H. Feng,D. L. Chen,Z. Y. Ma,W. Y. Ma,&R. J. Song.(2014).Microstructure and Strain Hardening of a Friction Stir Welded High-Strength Al-Zn-Mg Alloy.Acta Metallurgica Sinica-English Letters,27(4),723-729.
MLA	A. H. Feng,et al."Microstructure and Strain Hardening of a Friction Stir Welded High-Strength Al-Zn-Mg Alloy".Acta Metallurgica Sinica-English Letters 27.4(2014):723-729.