Wire arc additive manufacture (WAAM) technology was employed to repair Ti–5Al–2Sn–2Zr–4Mo–4Cr (TC17) titanium alloy, which is widely used as compressor blades and blisk. The microstructure evolution and mechanical properties of the repaired specimen were investigated. The results show that the repaired specimen has a good verticality, and it forms good metallurgical bonding with the base metal. The ultimate strength of the interface specimen can reach 88.2% of the base metal. The elongation is slightly lower than the base metal due to the fact that half of the tensile interface specimens with little deformation are base material. Therefore, WAAM technology might be a potential and economical method to repair damaged blade by optimising the WAAM process.

中文翻译：

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电弧增材修复Ti-6.5Al-2Sn-2Zr-4Mo-4Cr钛合金的组织和力学性能

采用电弧增材制造 (WAAM) 技术修复 Ti–5Al–2Sn–2Zr–4Mo–4Cr (TC17) 钛合金，该合金广泛用作压缩机叶片和叶盘。研究了修复后试样的显微组织演变和力学性能。结果表明，修复后的试件具有良好的垂直度，与母材形成良好的冶金结合。界面试件的极限强度可达母材的88.2%。由于几乎没有变形的拉伸界面试样的一半是母材，因此伸长率略低于母材。因此，WAAM技术可能是一种通过优化WAAM工艺修复受损叶片的潜在且经济的方法。