TC11 titanium alloy is widely used in the manufacture of key components such as blades of gas turbine and aero engine because of its high specific strength and good processing performance. In the case of gas turbine or aero engine, the fatigue performance of TC11 will directly determine the life of the turbine or engine, and the surface residual stress generated on the alloy during manufacturing often affects the fatigue life of the material. In this study, a new method of coupled electromagnetic treatment (CEMT) was applied to regulate the surface residual stress of the alloy after manufacturing, so as to improve the fatigue life of the TC11. The results show that after the CEMT, the residual compressive stress in the length direction and width direction increased by 63.7% and 56.0% respectively, the fatigue life of the TC11 is increased by 39.9%. The microstructure analysis shows that after CEMT, the width of fatigue striations is significantly reduced. This paper proposes that CEMT can be used as an effective method to adjust the residual stress of materials and improve the fatigue life of titanium alloys. The research is also relevant for improvement of the fatigue life of other alloy materials.

中文翻译：

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通过耦合电磁处理提高钛合金的疲劳寿命


TC11钛合金因其比强度高、加工性能好，被广泛应用于燃气轮机和航空发动机叶片等关键部件的制造。对于燃气轮机或航空发动机，TC11 的疲劳性能将直接决定涡轮或发动机的寿命，而合金在制造过程中产生的表面残余应力往往会影响材料的疲劳寿命。本研究采用耦合电磁处理 （CEMT） 的新方法来调节合金制造后的表面残余应力，从而提高 TC11 的疲劳寿命。结果表明：CEMT后，TC11在长度方向和宽度方向的残余压应力分别增加了63.7%和56.0%，疲劳寿命提高了39.9%。微观组织分析表明，CEMT 后，疲劳条纹的宽度明显减小。本文提出 CEMT 可以作为调整材料残余应力和提高钛合金疲劳寿命的有效方法。该研究还与提高其他合金材料的疲劳寿命有关。