Abstract The surface integrity and fatigue properties of TC17 alloy blades under integrated manufacturing processes are investigated. The Ra values of milling–polishing (MP)-processed and milling–polishing–shot peening–vibration polishing (MPSV)-processed blades are less than 0.4 µm. MPSV produces a strengthened layer about 100 µm and a gradient microstructure. The modal analysis results obtained from finite element calculation corresponds well with the values measured experimentally. The fatigue lives of the MPSV-processed blades are increased by approximately 119.5% compared with the MP-processed blades. The fatigue fracture morphology indicates that fatigue cracks are initiated on the leading edge surface regardless of the processes employed.

中文翻译：

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TC17 合金叶片铣削、抛光和喷丸处理后表面完整性和疲劳性能的演变

摘要 研究了集成制造工艺下TC17合金叶片的表面完整性和疲劳性能。铣削-抛光 (MP) 加工和铣削-抛光-喷丸强化-振动抛光 (MPSV) 加工的刀片的 Ra 值小于 0.4 µm。MPSV 产生约 100 µm 的强化层和梯度微结构。从有限元计算获得的模态分析结果与实验测量值非常吻合。与 MP 处理的叶片相比，MPSV 处理的叶片的疲劳寿命增加了约 119.5%。疲劳断裂形态表明，无论采用何种工艺，前缘表面都会产生疲劳裂纹。