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<p>Vibratory peening is a promising vibro-strengthening process combining shot peening and vibratory polishing into a single-step mechanical surface treatment. Vibratory peening induces surface compressive stresses and strain hardening, which improves the surface finish and fatigue life of components in aerospace and energy applications. This study comprehensively investigates the effect of five vibratory peening parameters (specimen surface preparation, rotating shaft eccentricity, frequency, specimen immersion depth, and processing time) on the surface properties of Ti-6Al-4V alloy, combining an experimental-statistical approach to establish process–property correlations. The results show improved surface properties, with surface roughness limited between 0.13 and 0.19&#xa0;µm. Compressive residual stress distribution shows a maximum value of 812&#xa0;MPa at a depth of 71&#xa0;µm below the surface. The total depth of influence is found to be 230&#xa0;µm. The rotating shafts eccentricity, frequency, and specimen immersion depth must be increased simultaneously to minimize the roughness reduction time, maximize the magnitude and depths of compressive residual stresses, as well as the plastic strain depth.</p>

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Effect of Vibratory Peening Parameters on Surface Properties of Ti-6Al-4 V Titanium Alloy: Experimental and Statistical Approach

  • 期刊论文

  • 发表日期：

    2025年8月7日

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  • Maxime Paques,
  • Waris Nawaz Khan,
  • Apratim Chakraborty,
  • Benoit Changeux,
  • Sylvain Turenne,
  • Jean-Philippe Masse,
  • Gilles L’Espérance,
  • Etienne Martin

摘要

Vibratory peening is a promising vibro-strengthening process combining shot peening and vibratory polishing into a single-step mechanical surface treatment. Vibratory peening induces surface compressive stresses and strain hardening, which improves the surface finish and fatigue life of components in aerospace and energy applications. This study comprehensively investigates the effect of five vibratory peening parameters (specimen surface preparation, rotating shaft eccentricity, frequency, specimen immersion depth, and processing time) on the surface properties of Ti-6Al-4V alloy, combining an experimental-statistical approach to establish process–property correlations. The results show improved surface properties, with surface roughness limited between 0.13 and 0.19 µm. Compressive residual stress distribution shows a maximum value of 812 MPa at a depth of 71 µm below the surface. The total depth of influence is found to be 230 µm. The rotating shafts eccentricity, frequency, and specimen immersion depth must be increased simultaneously to minimize the roughness reduction time, maximize the magnitude and depths of compressive residual stresses, as well as the plastic strain depth.