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<p>This paper investigates the variation in microstructure and friction-wear properties of AlSi10Mg produced by selective laser melting under different shot peening strengths. Initially, selective laser melting was applied to the experimental material, AlSi10Mg. Subsequently, the produced AlSi10Mg samples were subjected to shot peening at strength of 0.2, 0.3, and 0.4&#xa0;MPa, respectively. Finally, the experimental materials after shot peening were subjected to microstructural observation and mechanical property testing to investigate the evolution of the microstructure and the variation in mechanical properties under different shot peening strengths. After shot peening, a plastic deformation layer was observed on the surface of the experimental material, and its thickness increased with the intensity of shot peening, measuring 25, 42, and 63&#xa0;μm, respectively. After shot peening, the surface roughness of the experimental material increased, with the surface height difference rising from 18.95 to 133.2&#xa0;μm. The grains in the microstructure were refined, and dislocations increased. The average wear depth decreased from 88.99 to 58.14 μm, and the average wear width reduced from 1007 to 453&#xa0;μm. The average friction coefficients were 0.29, 0.26, and 0.19, respectively. The wear rate also decreased from 8.33 to 2.57 µm<sup>3</sup>/N. Among the three shot peening strengths applied to the selectively laser-melted AlSi10Mg, the friction and wear properties were optimal under the 0.4&#xa0;MPa treatment.</p>

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Effect of Shot Peening Strength on Surface Microstructural Characteristics and Wear Properties of Selective Laser Melting AlSi10Mg Alloy

  • 期刊论文

  • 发表日期：

    2025年6月27日

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  • Zi Li,
  • Haijun Pan,
  • Wenyu Tao,
  • Lin Liu,
  • Zhiqiang Wu,
  • Zhihui Cai

摘要

This paper investigates the variation in microstructure and friction-wear properties of AlSi10Mg produced by selective laser melting under different shot peening strengths. Initially, selective laser melting was applied to the experimental material, AlSi10Mg. Subsequently, the produced AlSi10Mg samples were subjected to shot peening at strength of 0.2, 0.3, and 0.4 MPa, respectively. Finally, the experimental materials after shot peening were subjected to microstructural observation and mechanical property testing to investigate the evolution of the microstructure and the variation in mechanical properties under different shot peening strengths. After shot peening, a plastic deformation layer was observed on the surface of the experimental material, and its thickness increased with the intensity of shot peening, measuring 25, 42, and 63 μm, respectively. After shot peening, the surface roughness of the experimental material increased, with the surface height difference rising from 18.95 to 133.2 μm. The grains in the microstructure were refined, and dislocations increased. The average wear depth decreased from 88.99 to 58.14 μm, and the average wear width reduced from 1007 to 453 μm. The average friction coefficients were 0.29, 0.26, and 0.19, respectively. The wear rate also decreased from 8.33 to 2.57 µm3/N. Among the three shot peening strengths applied to the selectively laser-melted AlSi10Mg, the friction and wear properties were optimal under the 0.4 MPa treatment.