Refill Friction Stir Spot Welding of Dissimilar 6061/7075 Aluminum Alloy

Author:

Liu Zhenlei1,Yang Kang1,Yan Dejun2

Affiliation:

1. Faculty of Aerospace Engineering , Shenyang Aerospace University , Shenyang 110136 , China

2. Guangdong Key Laboratory of Enterprise Advanced Welding Technology for Ships , CSSC Huangpu Wenchong Shipbuilding Company Limited , Guangzhou 510715 , China

Abstract

Abstract Refill friction stir spot welding (RFSSW) was used to join 6061-T6 and 7075-T6 aluminum alloys in this work. Different sheet configurations and welding parameters were used to optimize joint strength. The effect of sleeve plunge depth on the microstructure and mechanical properties of the joints were investigated. The results showed that no defects were obtained when 6061-T6 aluminum alloy was placed as the upper sheet. The lap shear failure load of the joint using 6061-T6 aluminum alloy as the upper sheet was higher than that using 7075-T6 as the upper sheet. The maximum failure load of 12,892 N was attained when using the sleeve plunge depth of 3.6 mm. The joint failed at the upward flowing 7075 near the hook.

Publisher

Walter de Gruyter GmbH

Subject

Physical and Theoretical Chemistry,Mechanics of Materials,Condensed Matter Physics,General Materials Science

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