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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
Source PublicationActa Metallurgica Sinica-English Letters
ISSN1006-7191
Volume27Issue:4Pages:723-729
AbstractMicrostructural 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.
description.department[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
KeywordAluminum 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
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/73224
Collection中国科学院金属研究所
Recommended Citation
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.
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