Influence of Local Heat Treatment on Failure Behavior of TA1 Titanium Alloy-SPCC Steel Clinched Joint

The connection part of TA1 titanium alloy-SPCC steel clinched joint was heated to 900 ℃ then water quenched on the self-designed experimental platform. The influences of the local heat treatment on the failure load and failure mode of the clinched joint were investigated. The results show that the failure load of the clinched joint after local heat treatment was 5 371.9 N, which was improved by 26.34% comparing to 4 252.4 N before local heat treatment. The failure mode of the clinched joint before local heat treatment was a pull-off failure between upper and lower plate and the fracture mode was ductile fracture. After local heat treatment, the failure mode of the clinched joint was a mixture failure of pull-off and neck breaking and the fracture mode was quasi-cleavage fracture.