Scholarlink

<p>This study investigates and compares the effects of mechanical shot peening (MSP) and mechanical shot peening + laser shot peening (MSP + LSP) on residual stress, microstructure, fatigue behavior of 6061-T6 aluminum alloy. MSP were applied with 0.36 mmA and range of coverage 100%, LSP were applied with spot diameter 2&#xa0;mm, the laser pulse was 23&#xa0;ns, and the spot overlapping rate was 50%, and a wide range of the laser energy (1-7&#xa0;J). The surface roughness, hardness, and residual stress measurements, EBSD test, fatigue life test and fatigue section SEM test were performed. The results show that compared with single MSP, MSP + LSP significantly improves the surface hardness (maximum value: 131.25 HV), the grain refinement degree(minimum average grain size: 15.06&#xa0;μm), the value of residual compressive stress, the thickness of residual compressive stress layer(maximum value: 500&#xa0;μm), and the fatigue life of the samples. When the laser energy tends to 7&#xa0;J, the strengthening of the sample tends to saturation, and the fatigue life increases and tends to stabilize. Compared with the no-shot peening (NSP) sample, the fatigue cycle life of MSP sample increased by 106.63%, the fatigue cycle life of MSP + LSP(7&#xa0;J) sample increased by 62.66% than the MSP sample. MSP + LSP significantly strengthen the samples and improve the fatigue life of the samples, and efficiently prevent the fatigue failure of the samples.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Investigation of the Microscopic and Fatigue Behavior of Aluminum 6061-T6 Alloy by Mechanical Shot Peening + Laser Shot Peening

  • 期刊论文

  • 发表日期：

    2026年1月18日

查看全文
  • Long Li,
  • Luteng Liu,
  • Shihong Lu,
  • Kefei Wang,
  • Chaoyang Zhang,
  • Jianyong Gao

摘要

This study investigates and compares the effects of mechanical shot peening (MSP) and mechanical shot peening + laser shot peening (MSP + LSP) on residual stress, microstructure, fatigue behavior of 6061-T6 aluminum alloy. MSP were applied with 0.36 mmA and range of coverage 100%, LSP were applied with spot diameter 2 mm, the laser pulse was 23 ns, and the spot overlapping rate was 50%, and a wide range of the laser energy (1-7 J). The surface roughness, hardness, and residual stress measurements, EBSD test, fatigue life test and fatigue section SEM test were performed. The results show that compared with single MSP, MSP + LSP significantly improves the surface hardness (maximum value: 131.25 HV), the grain refinement degree(minimum average grain size: 15.06 μm), the value of residual compressive stress, the thickness of residual compressive stress layer(maximum value: 500 μm), and the fatigue life of the samples. When the laser energy tends to 7 J, the strengthening of the sample tends to saturation, and the fatigue life increases and tends to stabilize. Compared with the no-shot peening (NSP) sample, the fatigue cycle life of MSP sample increased by 106.63%, the fatigue cycle life of MSP + LSP(7 J) sample increased by 62.66% than the MSP sample. MSP + LSP significantly strengthen the samples and improve the fatigue life of the samples, and efficiently prevent the fatigue failure of the samples.