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为了实现钛合金(TA1)和铜合金(H62)及铝合金(Al5052)压印连接的可行性,对其压印接头进行拉伸—剪切试验。运用扫描电子显微镜对接头拉伸断口微观形貌进行了分析,基于有限元软件ANSYS/LS-DYNA软件建立了压印连接过程的二维轴对称模型。结果表明:压印连接技术可实现TA1-H62和Al5052-TA1钛合金异种板材的有效连接,压印连接试验和模拟结果具有良好的一致性;两接头的破坏模式均为颈部断裂。从微观分析可知,两种接头上板颈部断口不同受力点均出现剪切作用形成的韧窝特征,为典型的韧性断裂,且TA1-H62接头断口最后受力点具有准解理和韧窝等多种形貌特征。
In order to achieve the feasibility of the imprinting connection between titanium alloy (TA1) and copper alloy (H62) and aluminum alloy (Al5052), the stamped joint was subjected to tensile-shear test. The microstructure of the tensile fracture of the joint was analyzed by scanning electron microscope. The two-dimensional axisymmetric model of the imprinting process was established based on the finite element software ANSYS / LS-DYNA. The results show that: Imprint connection technology can achieve the effective connection of TA1-H62 and Al5052-TA1 titanium alloy dissimilar plates, and the embossed connection test has good consistency with the simulation results; the fracture modes of both joints are the fracture of the neck. From the microscopic analysis, it can be seen that the dimples formed by shearing at different stress points on the neck and neck fracture of the two joints are typical ductile fracture, and the final stress point of the TA1-H62 joint has quasi-cleavage and toughness Lots and many other morphological features.