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<p>This study investigates the effects of different surface micro-textured tools on the high-speed machining mechanism of CoCrFeNiAl0.6 (referred to as Al0.6) high-entropy alloy. Four types of micro-textured tools were designed, and simulation methods were employed to explore the impact of different micro-texture parameters on cutting temperature, cutting force, chip morphology, residual stress, and surface roughness during the cutting process. The innovation of this study is that through the combination of simulation and experiment, the machining effect of micro-texture tool on high-entropy alloy under dry cutting conditions is discussed, and effective tool design ideas and machining optimization methods are provided, which has important scientific significance and engineering application value for the future machining research of high-entropy alloy. The results indicate that compared to untextured tools, longitudinal-groove tools can reduce cutting temperature by approximately 6%, with cutting forces and friction forces also reduced by 4% and 3%, respectively. As cutting speed increases, the reduction in cutting temperature for transverse-groove tools exceeds that of longitudinal-groove tools. Under the same cutting conditions, untextured tools produce the smoothest chip surfaces, while micro-textured tools result in uneven, torn, or notched chip surfaces. However, the integrity of chips from micro-textured tools significantly improves with increasing cutting depth. Conversely, the degree of chip fragmentation for micro-textured tools becomes more pronounced with increasing cutting speed. Longitudinal-groove tools consistently maintain the best chip integrity under various cutting parameters. Both untextured and micro-textured tools exhibit a pattern of residual tensile stress decreasing first and then increasing. Transverse-groove tools show the highest peak residual compressive stress, reaching approximately 502N, which is 2.2 times that of longitudinal-groove tools. Longitudinal-groove tools achieve the smallest surface roughness, with a maximum peak displacement of 1.8&#xa0;μm, representing an approximately 11% reduction compared to untextured tools.</p>

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Influence of surface micro-textured tools on high-speed machining mechanism of CoCrFeNiAl0.6 high-entropy alloy

  • 期刊论文

  • 发表日期：

    2025年6月11日

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  • Ping Zhang,
  • Shunxiang Wang,
  • Lan Changyin,
  • Jinlong Zhang,
  • Yajie Sun

摘要

This study investigates the effects of different surface micro-textured tools on the high-speed machining mechanism of CoCrFeNiAl0.6 (referred to as Al0.6) high-entropy alloy. Four types of micro-textured tools were designed, and simulation methods were employed to explore the impact of different micro-texture parameters on cutting temperature, cutting force, chip morphology, residual stress, and surface roughness during the cutting process. The innovation of this study is that through the combination of simulation and experiment, the machining effect of micro-texture tool on high-entropy alloy under dry cutting conditions is discussed, and effective tool design ideas and machining optimization methods are provided, which has important scientific significance and engineering application value for the future machining research of high-entropy alloy. The results indicate that compared to untextured tools, longitudinal-groove tools can reduce cutting temperature by approximately 6%, with cutting forces and friction forces also reduced by 4% and 3%, respectively. As cutting speed increases, the reduction in cutting temperature for transverse-groove tools exceeds that of longitudinal-groove tools. Under the same cutting conditions, untextured tools produce the smoothest chip surfaces, while micro-textured tools result in uneven, torn, or notched chip surfaces. However, the integrity of chips from micro-textured tools significantly improves with increasing cutting depth. Conversely, the degree of chip fragmentation for micro-textured tools becomes more pronounced with increasing cutting speed. Longitudinal-groove tools consistently maintain the best chip integrity under various cutting parameters. Both untextured and micro-textured tools exhibit a pattern of residual tensile stress decreasing first and then increasing. Transverse-groove tools show the highest peak residual compressive stress, reaching approximately 502N, which is 2.2 times that of longitudinal-groove tools. Longitudinal-groove tools achieve the smallest surface roughness, with a maximum peak displacement of 1.8 μm, representing an approximately 11% reduction compared to untextured tools.