Abstract The excellent high temperature performance of gamma titanium aluminium (γ-TiAl) intermetallic not only makes itself a promising aero-engine material to replace Ni-based supperalloys but also poses machining challenges. A novel hybrid machining process namely blasting erosion arc grinding (BEAG) is proposed to process γ-TiAl. In this process, a creatively designed tool is implemented to perform high efficiency blasting erosion arc machining (BEAM) with an electrode and further polish the arc machined surface with the grinding part simultaneously. The experimental results illustrate that compared to BEAM and grinding, BEAG obtains a considerable material removal rate with a good surface quality.

中文翻译：

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γ-TiAl 的高性能混合加工与喷砂侵蚀弧加工和磨削

摘要 γ-钛铝（γ-TiAl）金属间化合物优异的高温性能不仅使其成为替代镍基高温合金的有前途的航空发动机材料，而且也带来了机械加工方面的挑战。提出了一种新的混合加工工艺，即爆破腐蚀电弧磨削 (BEAG) 来加工 γ-TiAl。在此过程中，采用创新设计的工具，使用电极进行高效的喷砂腐蚀电弧加工（BEAM），并同时使用磨削零件进一步抛光电弧加工表面。实验结果表明，与 BEAM 和研磨相比，BEAG 获得了可观的材料去除率和良好的表面质量。