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Influencing mechanism of Zn interlayer addition on hook defects of friction stir spot welded Mg-Al-Zn alloy joints
R. Z.; Ni Xu, D. R.; Yang, Q.; Liu, C. Z.; Ma, Z. Y.
2015
Source PublicationMaterials & Design
ISSN0261-3069
Volume69Pages:163-169
Abstract2.4 mm thick Mg-Al-Zn alloy sheets were friction stir spot welded (FSSW) without and with the addition of 0.1 mm thick Zn interlayer. The influence of interlayer addition on the microstructural features and mechanical properties of FSSW joints was investigated by optical microscope, scanning electron microscope, transmission electron microscope, X-ray diffraction and tensile testing. The results show that the addition of Zn interlayer resulted in complex alloying reactions between Mg substrate and Zn interlayer, forming a bonded zone composed of alpha-Mg, (alpha-Mg + MgZn) eutectoid structure and a mixture of Mg4Zn7 and unreacted Zn, thereby increasing the area of bonded zone and reducing the hook defects. This results in a significant increase in tensile-shear load from 2.4 kN to about 4 kN. (C) 2015 Elsevier Ltd. All rights reserved.
description.department[xu, r. z. ; ni, d. r. ; yang, q. ; ma, z. y.] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china. [xu, r. z. ; liu, c. z.] shenyang aerosp univ, coll mat sci & engn, shenyang 110136, peoples r china. ; ma, zy (reprint author), chinese acad sci, inst met res, shenyang natl lab mat sci, 72 wenhua rd, shenyang 110016, peoples r china. ; zyma@imr.ac.cn
KeywordFriction Stir Spot Welding Magnesium Alloys Hook Defects Interlayer Alloying Magnesium Alloy Material Flow Microstructures
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Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/73988
Collection中国科学院金属研究所
Recommended Citation
GB/T 7714
R. Z.,Ni Xu, D. R.,Yang, Q.,et al. Influencing mechanism of Zn interlayer addition on hook defects of friction stir spot welded Mg-Al-Zn alloy joints[J]. Materials & Design,2015,69:163-169.
APA R. Z.,Ni Xu, D. R.,Yang, Q.,Liu, C. Z.,&Ma, Z. Y..(2015).Influencing mechanism of Zn interlayer addition on hook defects of friction stir spot welded Mg-Al-Zn alloy joints.Materials & Design,69,163-169.
MLA R. Z.,et al."Influencing mechanism of Zn interlayer addition on hook defects of friction stir spot welded Mg-Al-Zn alloy joints".Materials & Design 69(2015):163-169.
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