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The International Journal of Advanced Manufacturing Technology

Erschienen in:

14.01.2022 | ORIGINAL ARTICLE

Interface characteristics, microstructure, and mechanical properties of friction stir lap welded dissimilar Al/Mg alloy joints: effect of pin-tip profile

verfasst von: Ping Yang, Yuqing Mao, Yang Xu, Ning Li, Liming Ke, Yu Chen

Erschienen in: The International Journal of Advanced Manufacturing Technology | Ausgabe 7-8/2022

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Abstract

Three pin-tip profiles of cylinder (C-tool), square (S-tool), and triangular (T-tool) were innovatively designed, and the effect of pin-tip profile on interfacial microstructure and mechanical properties of friction stir lap welded (FSLW) joints was investigated. The results show that the interface characteristics of FSLW joints fabricated by various pin-tip profiles are notably different. The upward migration of Mg alloy at the interface of S-tool and T-tool joints significantly reduces. Moreover, two intermetallic compound (IMC) layers (Al₃Mg₂ and Al₁₂Mg₁₇) with about 4.6-μm thickness are formed on the interface bottom by C-tool. However, only one continuous IMC layer of and eutectic structure (Mg+Al₁₂Mg₁₇) on the Al side are generated at the interface by S-tool, and the interface by T-tool is composed of a discontinuous IMC layer and eutectic structure. The maximum tensile-shearing load of the joints welded by S-tool is obtained, which reaches 5.95 KN. The fractured location occurs along the eutectic structure layer on the Al side.

Vorheriger Artikel Influences of weaving parameters on dynamic characteristics and stability control of the droplet transfer in arc-weaving P-GMAW process

Nächster Artikel Filler parameters affected wrinkling behavior of aluminum alloy double-layered gap tube in rotary draw bending process

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Titel: Interface characteristics, microstructure, and mechanical properties of friction stir lap welded dissimilar Al/Mg alloy joints: effect of pin-tip profile
verfasst von: Ping Yang
Yuqing Mao
Yang Xu
Ning Li
Liming Ke
Yu Chen
Publikationsdatum: 14.01.2022
Verlag: Springer London
Erschienen in: The International Journal of Advanced Manufacturing Technology / Ausgabe 7-8/2022
Print ISSN: 0268-3768
Elektronische ISSN: 1433-3015
DOI: https://doi.org/10.1007/s00170-021-08611-0

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