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<p>CoCrFeNiMn high-entropy alloy (HEA), as a difficult-to-cut material, produces a large amount of heat of plastic deformation in the cutting area during cutting, and this local overheating phenomenon will lead to thermal damage to the surface of the workpiece, forming burn defects. This study proposes the application of an icing clamp in the milling process of CoCrFeNiMn to achieve low-temperature machining in order to address issues such as poor machined surface quality. Finite element simulations of low-temperature milling of HEA were carried out. Orthogonal and single-factor experiments for low-temperature milling of HEA were designed. The action mechanisms of milling process parameters (spindle speed, feed speed, and cutting depth) on the cutting force and cutting temperature were analyzed, and simulation results related to chip shape and workpiece surface topography were obtained. The range of process parameters for the low-temperature milling experiments of HEA were determined. Finally, based on the error analysis between experimental and simulation data of cutting force, the reliability of the finite element simulation model was verified. The influence mechanisms of process parameters on surface roughness, 3D surface topography, surface micro-topography, and surface microhardness were analyzed under low-temperature and room-temperature. The formation characteristics of the machined surface and the material removal behavior were revealed.</p>

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Experimental investigations into milling characteristics of CoCrFeNiMn high-entropy alloy assisted by low-temperature regulation

  • 期刊论文

  • 发表日期：

    2025年5月29日

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  • Yin Liu,
  • Zhenshan Luo,
  • Haosheng Dong,
  • Xingwei Sun,
  • Cuiping Li,
  • Heran Yang,
  • Shibo Mu,
  • Hongxun Zhao,
  • Zhixu Dong

摘要

CoCrFeNiMn high-entropy alloy (HEA), as a difficult-to-cut material, produces a large amount of heat of plastic deformation in the cutting area during cutting, and this local overheating phenomenon will lead to thermal damage to the surface of the workpiece, forming burn defects. This study proposes the application of an icing clamp in the milling process of CoCrFeNiMn to achieve low-temperature machining in order to address issues such as poor machined surface quality. Finite element simulations of low-temperature milling of HEA were carried out. Orthogonal and single-factor experiments for low-temperature milling of HEA were designed. The action mechanisms of milling process parameters (spindle speed, feed speed, and cutting depth) on the cutting force and cutting temperature were analyzed, and simulation results related to chip shape and workpiece surface topography were obtained. The range of process parameters for the low-temperature milling experiments of HEA were determined. Finally, based on the error analysis between experimental and simulation data of cutting force, the reliability of the finite element simulation model was verified. The influence mechanisms of process parameters on surface roughness, 3D surface topography, surface micro-topography, and surface microhardness were analyzed under low-temperature and room-temperature. The formation characteristics of the machined surface and the material removal behavior were revealed.