Abstract
•Effect of material positioning during dissimialr modified friction stir clinching brazing (MFSCB) of Al to Cu was studied.•MFSCB process under condition #1, when Al was placed on the top of the Cu during the second stage of the process, absolutely filled the keyhole defect.•In comparison to condition #2, weld produced under condition #1 revealed higher (approximately 30%) fracture load after peel test.
The influence of material positioning during modified friction stir clinching brazing (MFSCB) of Cu/Al (condition #1) and Al/Cu (condition #2) with the use of Zn as interlayer on metallurgical and mechanical properties was assessed. It was found that properties of MFSCB joints are markedly affected by the positioning of the materials. Further, results demonstrated that in condition #1, when pure Cu was placed on top of the AA5083, a sound weld without any crack at the brazed zone was created and the fracture load of the joint during peel test appreciably improved (approximately 30%) in comparison with condition #2.