friction stir welding-assisted diffusion bond of al/zn/mg lap joint

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ID: 168433
2018
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Abstract
Dissimilar materials welding between 2mm-thick AZ31B Mg alloy and 6061 Al alloy plates in overlap form was performed using the friction stir-induced diffusion bond with zinc foil as the interlayer. The microstructure and mechanical properties of the Al/Zn/Mg lap joints were analyzed by means of SEM, EPMA, XRD, tensile experiment and Vickers hardness test. The results show that diffusion layer consists of Al enrichment zone, Al5Mg11Zn4 layer and Mg-Zn eutectic zone at proper rotation speed; however, when rotation speed is low, the residual zinc interlayer remains in the diffusion layer; when rotation speed is high, the Al-Mg intermetallic compounds are present again. Due to the existence of intermetallic compounds in diffusion layer, its microhardness is significantly higher than that of base metal. The addition of zinc foil can improve the mechanical properties of Al/Mg lap joints. According to analysis on the fracture, joint failure occurs in the diffusion layer near to Al side.
Reference Key
yu-hua2018journalfriction Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors ;JIN Yu-hua;GAN Rui-gen;CHEN Fei;SHAO Qing-feng;WANG Xi-jing;GUO Ting-biao
Journal adsorption science and technology
Year 2018
DOI
10.11868/j.issn.1001-4381.2016.000426
URL
http://jme.biam.ac.cn/CN/Y2018/V46/I3/55
Keywords
friction stir welding mg alloy mechanics of materials failure loadmaterials of engineering and construction

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