Defect-free dissimilar Al/zinc coated steel and Al/AlSi coated steel welds were successfully fabricated by refill friction stir spot welding. However, Al alloy and uncoated steel could not be welded under the same welding condition. Al-Zn eutectic layer formed at the Al/zinc coated steel interface showed nonuniformity in thickness and nanoscale intermetallic（IMC） produced was discontinuous. The bonding formation between the Al-Zn layer and the surrounding materials was attributed to a liquid/solid reaction mechanism. Bonding formation at Al alloy and AlSi coated steel interface was attributed to a solid/solid reaction mechanism, as the joining process did not involve with melting of base metals or AlSi coating materials. Kissing bond formed at the weld boundary acted as a crack initiation and propagation site,and the present study showed that weld strength of Al 5754/AlSi coated steel was greatly influenced by properties of original IMC layer.
类型: 期刊论文
作者: Z.Shen,Y.Ding,J.Chen,B.Shalch Amirkhiz,J.Z.Wen,L.Fu,A.P.Gerlich
来源: Journal of Materials Science & Technology 2019年06期
年度: 2019
分类: 工程科技Ⅰ辑
专业: 金属学及金属工艺
单位: School of Materials Science and Engineering,Northwestern Polytechnical University,Shanxi Key Laboratory of Friction Welding Technologies,Northwestern Polytechnical University,State Key Laboratory of Solidification Processing,Northwestern Polytechnical University,Centre of Advance Materials Joining,Department of Mechanical and Mechatronics Engineering,University of Waterloo,CanmetMATERIALS,Natural Resources Canada
基金: supported by the Natural Science and Engineering Council(NSERC)of Canada,the Canadian Foundation for Innovation
分类号: TG453.9
页码: 1027-1038
总页数: 12
文件大小: 2276K
下载量: 20
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