Feasibility and interface migration characteristics of friction stir lap welding of LA141 Mg-Li alloy

Autor: Li Hui, Xu Rongzheng, Hou Yanxi, Cui Shenglin, Wei Zhicheng
Jazyk: angličtina
Rok vydání: 2019
Předmět:
Zdroj: Reviews on Advanced Materials Science, Vol 58, Iss 1, Pp 123-131 (2019)
Druh dokumentu: article
ISSN: 1605-8127
DOI: 10.1515/rams-2019-0015
Popis: 2 mm-thick LA141 plates were successfully friction stir lap welded (FSLW). The similar FSLWLA141Mg-Li alloy joint appeared a downward hook on the advanced side and an upward cold lap on the retreating side. The load of lap-shear tensile testing reached 2.8 kN, and the joints failed in the interface defects. The interface migration of LA141/LA141 lap joint during FSLW process was driven by forces at interface, such as a frictional force paralleled to the thread, a downward pressure perpendicular to the surface of the thread, the resistance from unsoftened metal and its own gravity. Moreover, the FSLWof AZ31/LA141 and LA141/AZ31 furtherly verified that forces at the interface were critical factors in determining the interface migration during FSLW process.
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