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首页> 外文期刊>Materials Science and Engineering >Microstructure evolution dependence of work-hardening characteristic in cold deformation of a difficult-to-deform nickel-based superalloy
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Microstructure evolution dependence of work-hardening characteristic in cold deformation of a difficult-to-deform nickel-based superalloy

机译：在难以变形镍高超合金中冷变化工作 - 硬化特性的微观结构演化依赖性

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摘要

The work-hardening characteristic of nickel-based GH4141 superalloy was investigated using uniaxial compression tests with different cold deformations. Prior to compression, the solution treatment was optimized using the dissolving temperature of precipitations, the mean size of grains, and the microhardness of the samples. The typical true strain-stress curve included elastic deformation (ε ≤ 0.03), elastoplastic transition (0.03 ≤ ε ≤ 0.05), and plastic deformation (ε ≥ 0.05) stages. The true strain-stress relationship was formulated on the basis of Tian-Zhang model. During the plastic deformation stage, the true stress gradually increased due to the increase in dislocation slip resistance caused by the formation of dislocation tangles and different boundaries. The hardening rate gradually decreased because of the tardy dynamic recovery, and the decreasing dislocation density increment caused by the formation of grain boundaries.
机译：使用具有不同冷变形的单轴压缩试验研究了基于镍的GH4141高温合金的工作硬化特性。在压制之前，使用沉淀温度，晶粒的平均尺寸和样品的微硬度进行优化溶液处理。典型的真实应变曲线包括弹性变形（ε≤0.03），弹塑性转变（0.03≤ε≤0.05），塑性变形（ε≥0.05）阶段。在天张模型的基础上配制了真正的应变关系。在塑性变形阶段，由于脱位缠结和不同边界的形成引起的位错滑移阻力增加，真正的应力逐渐增加。由于迟钝的动态恢复，固化速率逐渐减小，并且由晶界形成引起的脱位密度增量降低。

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  • 来源
    《Materials Science and Engineering》 |2021年第7期|140280.1-140280.12|共12页
  • 作者

    Hongliang Liu; Maicang Zhang; Min Xu; Ye Meng; Guohua Xu; Na Ta; Lei Zheng;

  • 作者单位

    School of Materials Science and Engineering University of Science and Technology Beijing 100083 Beijing China;

    School of Materials Science and Engineering University of Science and Technology Beijing 100083 Beijing China;

    School of Materials Science and Engineering University of Science and Technology Beijing 100083 Beijing China;

    School of Materials Science and Engineering University of Science and Technology Beijing 100083 Beijing China;

    Superalloy Department Central Iron and Steel Research Institute 100081 Beijing China;

    School of Materials Science and Engineering University of Science and Technology Beijing 100083 Beijing China;

    School of Materials Science and Engineering University of Science and Technology Beijing 100083 Beijing China;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    Ni alloys; Work-hardening; Strain-stress curve; Uniaxial compression test;

    机译：Ni合金;工作硬化;应变应力曲线;单轴压缩测试;

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