Abstract
This paper deals with the join-ability of extensible die mechanical clinching in titanium and aluminium-lithium sheet materials. Latest developments in extensible die mechanical clinching processes for sheet materials are reviewed. Clinching process tests were carried out for the dissimilar alloy sheets combinations. To increase the join-ability, TA1 sheets were heated to 700 °C by an oxyacetylene flame gun. The temperature was controlled by an infrared thermometer. Tensile-shear tests were carried out to characterize the mechanical properties of the clinched joints. The quality assessment and failure mode of clinched joints were studied. Results showed that clinched joints of titanium and aluminium-lithium have very good join-ability and load-bearing capacity. It can be inferred from the energy absorption analyse results that the clinch joints failed with neck fracture mode can absorb more energy than that of the clinch joints failed with button separation mode.
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