Impact Joining of Pure Copper C1100 and Aluminum Alloy A6061-T6 Plates at Edges

• Published in: Metals (Basel ) Vol. 12; no. 10; p. 1565
• Main Authors: Yamashita, Minoru, Iwatsuka, Toru, Taguchi, Haruchika, Nikawa, Makoto
• Format: Journal Article
• Language: English
• Published: Basel MDPI AG 01.10.2022
• Subjects: Alloys; Aluminum; aluminum alloy; Aluminum alloys; Aluminum base alloys; Cold; Copper; Deformation; dissimilar joining; Edge joints; Efficiency; Friction stir welding; High speed; impact process; Joining; joint efficiency; Lasers; Mechanical properties; Metals; Plates; Shaving; Shear; Specialty metals industry; Tensile tests; Thickness; Titanium alloys; Welding
• ISSN: 2075-4701; 2075-4701
• DOI: 10.3390/met12101565

Joining of pure copper C1100 and aluminum alloy A6061-T6 plates of 5 mm thickness was investigated. The method was developed by one of the authors, in which the newly created surfaces of a pair of plates obtained by high-speed shear were immediately in contact with a sliding motion with a small overlap length. The total processing time was just about a few milliseconds. To create the new surface, high-speed shaving was also tested. The joining was not possible for the full thickness of the plates. A sharp notch was observed at the joint boundary due to a large shear droop in the copper. Shaving decreased the shear droop, and the joint length through the plate thickness became longer. The joining performance was evaluated by a uniaxial tensile test. The joint efficiency reached 100% using the specimen cut out from the really joined boundary. The affected zone of joining was confirmed by the hardness distribution near the boundary. It was about 30% of the thickness of the plate, which was much smaller than that in welding by heat, and no softened zone was found in both materials.