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首页> 外文期刊>High temperature materials and processes >Effect of Deformation Temperatures on High Temperature Tensile Instability of Austenitic Stainless Steel
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Effect of Deformation Temperatures on High Temperature Tensile Instability of Austenitic Stainless Steel

机译：变形温度对奥氏体不锈钢高温拉伸不稳定性的影响

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摘要

The characteristics of instability have been investigated on two low nickel austenite stainless steel at the temperatures of 950-1200 ℃ through the uniaxial tensile test and tensile unload test. The results show geometrical instability is not concurrent with load instability in high temperature tensile. The deformation of specimens are uniform before the load instability, then appear non-uniform in some local area of specimen but they do not directly lead to the geometric instability. With the increase of deformation temperature, load instability strain and strain hardening exponent n are both no obvious variation, and load instability true strain is close to n and depends on n. The geometric instability strain and strain rate sensitivity coefficient m both increase with the increase of temperature, and the strain between load instability and geometric instability depends on m and is the main part of the geometric instability strain.
机译：通过单轴拉伸试验和拉伸卸载试验研究了两种低镍奥氏体不锈钢在950-1200℃温度下的不稳定性。结果表明，在高温拉伸下，几何形状的不稳定性与载荷的不稳定性并不同时发生。载荷不稳定之前，试样的变形是均匀的，然后在试样的某些局部区域出现不均匀的变形，但它们并没有直接导致几何上的不稳定性。随着变形温度的升高，载荷不稳定性应变和应变硬化指数n均无明显变化，载荷不稳定性真实应变接近n并取决于n。几何不稳定性应变和应变率灵敏度系数m均随温度的升高而增加，载荷不稳定性和几何不稳定性之间的应变取决于m，是几何不稳定性应变的主要部分。

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  • 来源
    《High temperature materials and processes》 |2014年第5期|463-468|共6页
  • 作者

    Hongxia Bian; Liang Zhu; Hui Zhou; Peng Tu;

  • 作者单位

    State Key Laboratory of Gansu Advanced Non-ferrous Metal Materials, Lanzhou University of Technology, Lanzhou 730050, China;

    State Key Laboratory of Gansu Advanced Non-ferrous Metal Materials, Lanzhou University of Technology, Lanzhou 730050, China;

    State Key Laboratory of Gansu Advanced Non-ferrous Metal Materials, Lanzhou University of Technology, Lanzhou 730050, China;

    College of Science, Gansu Agricultural University, Lanzhou 730070, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    load instability; geometrical instability; work hardening exponent; strain rate sensitivity coefficient;

    机译：负载不稳定;几何不稳定性工作硬化指数;应变率灵敏度系数;

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