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Fatigue behavior of friction stir spot welded AZ31 Mg alloy sheet joints
T. J. Luo; B. L. Shi; Q. Q. Duan; J. W. Fu; Y. S. Yang
2013
Source PublicationTransactions of Nonferrous Metals Society of China
ISSN1003-6326
Volume23Issue:7Pages:1949-1956
AbstractThe fatigue behavior of friction stir spot welded (FSSW) AZ31 magnesium alloy sheet joints was investigated by tension compression of fatigue test. The results suggest that all the fatigue failures occur at the stir zone of the FSSW AZ31 sheet joints, and all cracks initiate at the stir zone outer edge between the upper and lower sheet. When the cycle force equals 1 IN, the crack propagates along the interface of heat-affected zone and thermo-mechanical zone, simultaneously across the direction of force; while the cycle force equals 3 IN, the crack propagates along the diameter of stir zone and shear failure occurs finally. Moreover, the transverse microsections indicate that there is a tongue-like region at the outer edge of stir zone between the two AZ31 sheets, and the direction of tongue-like region is toward outside of the stirred zone and all fatigue cracks initiate at the tongue-like region.
description.department[luo, tian-jiao ; shi, bao-liang ; duan, qi-qiang ; fu, jun-wei ; yang, yuan-sheng] chinese acad sci, inst met res, shenyang 110016, peoples r china. ; yang, ys (reprint author), chinese acad sci, inst met res, shenyang 110016, peoples r china. ; ysyang@imr.ac.cn
KeywordAz31 Mg Alloy Sheet Friction Stir Spot Welding Fatigue Fatigue Failure Fatigue Crack Mechanical-properties Magnesium Strength
URL查看原文
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/71399
Collection中国科学院金属研究所
Recommended Citation
GB/T 7714
T. J. Luo,B. L. Shi,Q. Q. Duan,et al. Fatigue behavior of friction stir spot welded AZ31 Mg alloy sheet joints[J]. Transactions of Nonferrous Metals Society of China,2013,23(7):1949-1956.
APA T. J. Luo,B. L. Shi,Q. Q. Duan,J. W. Fu,&Y. S. Yang.(2013).Fatigue behavior of friction stir spot welded AZ31 Mg alloy sheet joints.Transactions of Nonferrous Metals Society of China,23(7),1949-1956.
MLA T. J. Luo,et al."Fatigue behavior of friction stir spot welded AZ31 Mg alloy sheet joints".Transactions of Nonferrous Metals Society of China 23.7(2013):1949-1956.
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