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<p>Taking the evolution of material behavior during the cutting process of the FeCoNiCrCu high-entropy alloy as the research object, this paper investigates the segregation behavior of principal elements during cutting, analyses the formation mechanism of principal elemental segregation from an energy perspective, and discusses the effects of this behavior on chip formation and machined surface generation, so as to provide a theoretical reference for the engineering application of high-entropy alloys. The results demonstrate that during the cutting of FeCoNiCrCu, the cutting temperature and cutting deformation induce the diffusion of vacancies associated with the principal elements, thereby resulting in principal elemental segregation; when the cutting speed exceeds 300&#xa0;m/min, Cu and Cr undergo significant diffusion, with Cu tending to form enrichment zones and exhibiting mutual exclusion with Cr. The segregation of principal elements promotes the formation of plastic slip bands in the chip, which elevates the material deformation degree, leading to the generation of serrated chips and an increase in serration frequency during cutting; meanwhile, the increased deformation degree refines the grains in the deformation zone and contributes to the formation of ultrafine grains.</p>

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Principal elemental segregation behavior during the machining of high-entropy alloy FeCoNiCrCu

  • 期刊论文

  • 发表日期：

    2026年5月4日

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  • Keguo Zhang,
  • Renjie Jiao,
  • Jialin Sun,
  • Kaikai Song,
  • Zhanqiang Liu

摘要

Taking the evolution of material behavior during the cutting process of the FeCoNiCrCu high-entropy alloy as the research object, this paper investigates the segregation behavior of principal elements during cutting, analyses the formation mechanism of principal elemental segregation from an energy perspective, and discusses the effects of this behavior on chip formation and machined surface generation, so as to provide a theoretical reference for the engineering application of high-entropy alloys. The results demonstrate that during the cutting of FeCoNiCrCu, the cutting temperature and cutting deformation induce the diffusion of vacancies associated with the principal elements, thereby resulting in principal elemental segregation; when the cutting speed exceeds 300 m/min, Cu and Cr undergo significant diffusion, with Cu tending to form enrichment zones and exhibiting mutual exclusion with Cr. The segregation of principal elements promotes the formation of plastic slip bands in the chip, which elevates the material deformation degree, leading to the generation of serrated chips and an increase in serration frequency during cutting; meanwhile, the increased deformation degree refines the grains in the deformation zone and contributes to the formation of ultrafine grains.