Scholarlink

<p>The reduced-activation ferritic/martensitic (RAFM) steel CLF-1 has been designed as a candidate structural material for nuclear fusion energy reactors. For engineering mechanical design, the effects of temperature on the strain distribution of CLF-1 steel during uniaxial tensile tests were explored within the temperature range from room temperature to 650 °C using uniaxial tensile tests combined with in situ digital image correlation analysis. Strain-concentrated regions alternately distributed ± 45° along the tensile direction could be attributed to the shear stress having the maximum value at ± 45° along the tensile direction and the coordinated deformation of the microstructure. The total strain distribution changed from a normal distribution to a lognormal distribution with increasing deformation owing to the competition between the elastic and plastic strains at all test temperatures. Strain localization has a strong relationship with temperature at the same engineering strain because of the temperature effects on dynamic strain aging (DSA). The stronger the DSA effect, the stronger the strain localization. With increasing temperature, the stronger the strain localization at the same strain, the weaker the plasticity, that is, DSA-induced embrittlement, and the slower the strength decline, that is, DSA-induced hardening.</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

Temperature effects on strain distribution of reduced-activation ferritic/martensitic steel during tensile tests

  • 期刊论文

  • 发表日期：

    2025年4月19日

查看全文
  • Shang-Ming Chen,
  • Cheng-Jun Zhu,
  • Yi-Fan Shi,
  • Lei Peng,
  • Jing-Yi Shi,
  • Yong-Jie Sun,
  • Ye-Shang Hu,
  • Yi-Fei Liu,
  • Zhen-Yu Wei

摘要

The reduced-activation ferritic/martensitic (RAFM) steel CLF-1 has been designed as a candidate structural material for nuclear fusion energy reactors. For engineering mechanical design, the effects of temperature on the strain distribution of CLF-1 steel during uniaxial tensile tests were explored within the temperature range from room temperature to 650 °C using uniaxial tensile tests combined with in situ digital image correlation analysis. Strain-concentrated regions alternately distributed ± 45° along the tensile direction could be attributed to the shear stress having the maximum value at ± 45° along the tensile direction and the coordinated deformation of the microstructure. The total strain distribution changed from a normal distribution to a lognormal distribution with increasing deformation owing to the competition between the elastic and plastic strains at all test temperatures. Strain localization has a strong relationship with temperature at the same engineering strain because of the temperature effects on dynamic strain aging (DSA). The stronger the DSA effect, the stronger the strain localization. With increasing temperature, the stronger the strain localization at the same strain, the weaker the plasticity, that is, DSA-induced embrittlement, and the slower the strength decline, that is, DSA-induced hardening.