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<p>This study investigates the influence mechanism of waterjet peening on the fatigue performance of aluminum-based high-entropy alloy composites. A finite element model of waterjet-peened aluminum-based high-entropy alloys was developed using ABAQUS 2022, and the effects on fatigue life were validated through Fe-safe simulations. The results demonstrated a positive correlation between jet velocity and both surface roughness and residual compressive stress. Specifically, single-sided peening at 130&#xa0;mm/s resulted in an average surface roughness of 1.95029&#xa0;μm, which increased to 4.21943&#xa0;μm at 160&#xa0;mm/s. In the depth direction, a jet velocity of 130&#xa0;mm/s with a 5° angle induced a maximum residual compressive stress of approximately 189&#xa0;MPa, which increased by 85 to 274&#xa0;MPa at 160&#xa0;mm/s. Waterjet peening significantly improved fatigue performance. The optimal jet velocities for single-sided peening, peening at a 5° angle, and double-sided peening were 160, 160, and 150&#xa0;mm/s, respectively. Under a loading condition of 217&#xa0;MPa, the fatigue life of the treated samples increased by factors of 7.02, 7.97, and 8.80, reaching 3,526,634, 4,004,827, and 4,422,634 cycles, respectively, compared to the untreated specimens.</p>

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The Influence Mechanism of Waterjet Peening on the Fatigue Performance of Aluminum-Based High-Entropy Alloy Composites

  • 期刊论文

  • 发表日期：

    2025年10月23日

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  • Ping Zhang,
  • Yeran Gao

摘要

This study investigates the influence mechanism of waterjet peening on the fatigue performance of aluminum-based high-entropy alloy composites. A finite element model of waterjet-peened aluminum-based high-entropy alloys was developed using ABAQUS 2022, and the effects on fatigue life were validated through Fe-safe simulations. The results demonstrated a positive correlation between jet velocity and both surface roughness and residual compressive stress. Specifically, single-sided peening at 130 mm/s resulted in an average surface roughness of 1.95029 μm, which increased to 4.21943 μm at 160 mm/s. In the depth direction, a jet velocity of 130 mm/s with a 5° angle induced a maximum residual compressive stress of approximately 189 MPa, which increased by 85 to 274 MPa at 160 mm/s. Waterjet peening significantly improved fatigue performance. The optimal jet velocities for single-sided peening, peening at a 5° angle, and double-sided peening were 160, 160, and 150 mm/s, respectively. Under a loading condition of 217 MPa, the fatigue life of the treated samples increased by factors of 7.02, 7.97, and 8.80, reaching 3,526,634, 4,004,827, and 4,422,634 cycles, respectively, compared to the untreated specimens.