Mechanical performance and failure modes of self-piercing riveted joints between AA6061 and solution-treated TC4 alloy

Abstract TC4 titanium alloy and AA6061 aluminum are widely used in the transportation industry because of their excellent mechanical properties lightweight. In this work, was solution heat treated between 800 °C 990 for 1 h, water cooled to room temperature. The riveting tensile tests at temperature were conducted evaluate joint performance. strength failure morphology discuss performance joints. Solution treatment significantly improves elongation, performance, hardness alloy. Compared with as-received material, elongation is increased by 13% 900 °C, added 175 MPa 930 increased. optimal can be obtained °C. highest all When 850 rivets pulled from AA6061. While sheet broken rivet. At 960 near crack size gradually decreases rivet outward, spreads around Severe friction found, which causes peeling lower plate breaks alloys plastic broken. different under temperatures.