Comparative assessment of Ti-6Al-4 V titanium alloy fatigue life improvement by vibratory peening, shot peening, and vibratory finishing

IF 3.1 2区材料科学 Q2 ENGINEERING, MECHANICAL Fatigue & Fracture of Engineering Materials & Structures Pub Date : 2024-09-25 DOI:10.1111/ffe.14447

Maxime Paques, Apratim Chakraborty, Benoit Changeux, Hong Yan Miao, Waqas Muhammad, Sylvain Turenne, Kaan Inal, Etienne Martin

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Abstract

The effects of vibratory peening (VP), shot peening (SP), and SP followed by vibratory finishing (SPVF) on the surface and fatigue properties of Ti-6Al-4 V were compared to conventional low-stress grinding (LSG). VP processing produced seven times smoother surface finish than SP and 66% deeper compressive residual stresses (CRS) but with 12% lower magnitudes. SPVF produced optimal surface properties with a perfectly flat surface and CRS-like SP. All three mechanical surface treatments generated similar fatigue life improvements (108–122%) over LSG when the cyclic stress was below the yield stress. Above the yield stress, most of the CRS relaxed during the first cycle in VP specimens, resulting in up to 97% fatigue life improvement over LSG. The CRS relaxed more gradually in SP specimens leading to larger (up to 239%) fatigue life improvement. This shows the need to amplify CRS magnitudes produced in VP to maximize fatigue life improvement.

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通过振动强化、喷丸强化和振动光饰提高 Ti-6Al-4 V 钛合金疲劳寿命的比较评估

比较了振动强化（VP）、喷丸强化（SP）和先振动后喷丸（SPVF）与传统低应力磨削（LSG）对 Ti-6Al-4 V 表面和疲劳性能的影响。VP 加工产生的表面光滑度是 SP 的 7 倍，压缩残余应力 (CRS) 深化了 66%，但幅度降低了 12%。SPVF 产生了最佳的表面特性，具有完全平整的表面和类似 CRS 的 SP。当循环应力低于屈服应力时，与 LSG 相比，所有三种机械表面处理方法都产生了相似的疲劳寿命改善效果（108-122%）。在屈服应力以上，VP试样中的大部分CRS在第一个循环中松弛，与LSG相比，疲劳寿命提高了97%。在 SP 试样中，CRS 的松弛更为缓慢，因此疲劳寿命提高幅度更大（高达 239%）。这表明需要放大 VP 中产生的 CRS 幅值，以最大限度地提高疲劳寿命。

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来源期刊

Fatigue & Fracture of Engineering Materials & Structures 工程技术-材料科学：综合

CiteScore

6.30

自引率

18.90%

发文量

256

审稿时长

4 months

期刊介绍： Fatigue & Fracture of Engineering Materials & Structures (FFEMS) encompasses the broad topic of structural integrity which is founded on the mechanics of fatigue and fracture, and is concerned with the reliability and effectiveness of various materials and structural components of any scale or geometry. The editors publish original contributions that will stimulate the intellectual innovation that generates elegant, effective and economic engineering designs. The journal is interdisciplinary and includes papers from scientists and engineers in the fields of materials science, mechanics, physics, chemistry, etc.