Ti–22Fe–23Mn(at.%) eutectic brazing alloy ribbon fabricated by vacuum arc remelting and rapid solidification as filler metal used to vacuum braze Ti–45Al–2Mn–2Nb–1B(at.%) alloy. The effects of brazing temperature and time on the interfacial microstructure and joining properties were investigated in detail. The microstructure of the Ti–20Fe–21Mn brazing alloy presented excellent diffusion ability, and the brazed joints mainly consisted of α₂/γ lamellar phase, single α₂ phase, B2 phase, and boride. The brazed joint's tensile strength first increased and then decreased with the brazing temperature in the range of 1170 °C–1250 °C, and the holding time varied from 5 min to 60 min. The highest tensile strength at room temperature was 540 MPa when the joint brazed at 1230 °C for 45 min. The high-temperature tensile strength first increased and then decreased with the testing temperature. The high-temperature tensile strength of Ti–22Fe–23Mn(at.%) alloy was superior to Ti–Zr–Cu–Ni (at.%) alloy. The high-temperature tensile strength was lower than 45XD alloy below 850 °C. However, the tensile strength was closer to 45XD alloy when the testing temperature varied from 900 °C to 1000 °C. All the cracks nucleated and propagated in the poor boride zone, and the fracture surfaces presented typical brittle cleavage fracture characteristics.

Ti-22Fe-23Mn(at.%) 共晶钎焊合金带通过真空电弧重熔和快速凝固作为填充金属用于真空钎焊 Ti-45Al-2Mn-2Nb-1B(at.%) 合金。详细研究了钎焊温度和时间对界面微观结构和连接性能的影响。Ti-20Fe-21Mn钎焊合金的显微组织表现出优异的扩散能力，钎焊接头主要由α ₂ /γ层状相、单α ₂相、B2 相和硼化物。钎焊接头的抗拉强度随着钎焊温度在 1170°C~1250°C 范围内先增大后减小，保温时间从 5 分钟到 60 分钟不等。当接头在 1230°C 下钎焊 45 分钟时，室温下的最高拉伸强度为 540 MPa。高温拉伸强度随试验温度的升高先增大后减小。Ti-22Fe-23Mn(at.%)合金的高温抗拉强度优于Ti-Zr-Cu-Ni(at.%)合金。850℃以下高温抗拉强度低于45XD合金。然而，当测试温度从 900 °C 变化到 1000 °C 时，拉伸强度更接近 45XD 合金。所有裂纹都在贫硼化物区形核和扩展，