Scholarlink

<p>Hot deformation tests were performed under various temperature and strain rate conditions to determine the optimal hot working conditions for the Co–Cr–Fe alloy, extensively used in the aerospace industry for its excellent hardness and high wear resistance. The mechanical properties and microstructure observations showed that the flow stress of the sample, composed of M<sub>7</sub>C<sub>3</sub>–M<sub>2</sub>C carbides and face-centered cubic matrix, increased with decreasing temperature and increasing strain rate. Furthermore, as the deformation temperature increased, the volume fraction of recrystallized grains increased at equivalent strain levels, and the dynamic recrystallization mechanism transitioned from continuous dynamic recrystallization to discontinuous dynamic recrystallization. Based on the activation energy (<i>Q</i><sub>c</sub> = 419.4&#xa0;kJ/mol) and power exponent (<i>n</i> = 5.2) achieved from the true strain–stress curves, it was concluded that dislocation climb creep was the dominant deformation mechanism during hot working of the Co–Cr–Fe alloy.</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

Mechanical properties and microstructural evolutions during hot deformation of Co–Cr–Fe alloy

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年3月3日

查看全文
  • Chan-Wool Ahn,
  • Nam-Seok Kim,
  • Jeong-Chan Lee,
  • Jun Won Yoon,
  • Min Ah Baek,
  • Seok Su Sohn,
  • Chang-Soo Park

摘要

Hot deformation tests were performed under various temperature and strain rate conditions to determine the optimal hot working conditions for the Co–Cr–Fe alloy, extensively used in the aerospace industry for its excellent hardness and high wear resistance. The mechanical properties and microstructure observations showed that the flow stress of the sample, composed of M7C3–M2C carbides and face-centered cubic matrix, increased with decreasing temperature and increasing strain rate. Furthermore, as the deformation temperature increased, the volume fraction of recrystallized grains increased at equivalent strain levels, and the dynamic recrystallization mechanism transitioned from continuous dynamic recrystallization to discontinuous dynamic recrystallization. Based on the activation energy (Qc = 419.4 kJ/mol) and power exponent (n = 5.2) achieved from the true strain–stress curves, it was concluded that dislocation climb creep was the dominant deformation mechanism during hot working of the Co–Cr–Fe alloy.