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Material Sciences 2025
Cu-22TiH2连接Mo与Ti6Al4V接头的微观及力学性能
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Abstract:
采用Cu-22TiH2焊料在930℃时钎焊了Mo与Ti6Al4V合金，连接区域由焊料层和靠近Ti6Al4V合金侧的扩散层组成。其中，焊料层主要含有TiCu、Ti2Cu、Ti(ss) (固溶体)及Mo等相，而扩散层主要由Ti(ss)和Ti2Cu相组成。接头的剪切强度为56.2 ± 9.4 MPa，接头断裂发生在Mo母材上，这主要是由于接头残余热应力主要集中在热膨胀系数相对小的母材侧。
Mo and Ti6Al4V alloys were brazed using Cu-22TiH2 filler at 930？C. The joint area consists of a filler area and a diffusion area near the Ti6Al4V alloy substrate side. The filler area mainly contains TiCu, Ti2Cu, Ti(ss) (solid solution) and Mo phases, while the diffusion area mainly consists of Ti(ss) and Ti2Cu phases. The shear strength of the joint is 56.2 ± 9.4 MPa, and the joint fracture occurs on the Mo substrate, which is mainly due to the fact that the residual thermal stresses in the joint were mainly concentrated on the base material side, which has a relatively small coefficient of thermal expansion.
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