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首页> 外文期刊>Materials Science and Engineering >Temperature and grain size dependent plastic instability and strain rate sensitivity of ultrafine grained austenitic Fe-14Cr-16Ni alloy
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Temperature and grain size dependent plastic instability and strain rate sensitivity of ultrafine grained austenitic Fe-14Cr-16Ni alloy

机译：温度和晶粒尺寸依赖性的超细晶粒奥氏体Fe-14Cr-16Ni合金的塑性不稳定性和应变率敏感性

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摘要

In this study temperature and grain size dependent plastic instability and strain rate sensitivity (SRS) were investigated for coarse grained (CG) and ultrafine grained (UFG) austenitic Fe-14Cr-16Ni alloys. As tensile testing temperature increased from 20 to 200 ℃, UFG alloys exhibited much more prominent decrease of uniform strain compared with CG counterparts. Transmission electron microscopy (TEM) analysis of deformed UFG alloys revealed temperature dependent evolution of microstructures. Through grain refinement, the SRS of Fe-14Cr-16Ni alloy increased and activation volume decreased, which may be related to the interactions of dislocations with grain boundaries. The SRS of UFG alloys exhibited greater temperature dependence than CG alloys.
机译：在这项研究中，对奥氏体Fe-14Cr-16Ni粗晶粒（CG）和超细晶粒（UFG）的温度和晶粒尺寸依赖性塑性不稳定性和应变率敏感性（SRS）进行了研究。随着拉伸试验温度从20℃升高到200℃，UFG合金的均匀应变下降比CG合金明显得多。变形UFG合金的透射电子显微镜（TEM）分析揭示了温度随组织的演变。通过晶粒细化，Fe-14Cr-16Ni合金的SRS增加，活化体积减小，这可能与位错与晶界的相互作用有关。 UFG合金的SRS显示出比CG合金更大的温度依赖性。

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  • 来源
    《Materials Science and Engineering》 |2014年第12期|415-421|共7页
  • 作者

    C. Sun; J. Ma; Y. Yang; K.T. Hartwig; S.A. Maloy; H. Wang; X. Zhang;

  • 作者单位

    Department of Materials Science and Engineering, Texas A&M University, College Station, TX 77843, USA,Materials Science and Technology Division, Los Alamos National Laboratory, Los Alamos, NM 87545, USA;

    Department of Materials Science and Engineering, Texas A&M University, College Station, TX 77843, USA;

    Materials Science and Technology Division, Los Alamos National Laboratory, Los Alamos, NM 87545, USA;

    Department of Materials Science and Engineering, Texas A&M University, College Station, TX 77843, USA,Department of Mechanical Engineering, Texas A&M University. College Station, TX 77843, USA;

    Materials Science and Technology Division, Los Alamos National Laboratory, Los Alamos, NM 87545, USA;

    Department of Materials Science and Engineering, Texas A&M University, College Station, TX 77843, USA,Department of Electrical and Computer Engineering, Texas A&M University, College Station, TX 77843, USA;

    Department of Materials Science and Engineering, Texas A&M University, College Station, TX 77843, USA,Department of Mechanical Engineering, Texas A&M University. College Station, TX 77843, USA;

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  • 正文语种 eng
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  • 关键词

    Austenitic Fe-Cr-Ni alloy; Ultrafine grain; Temperature; Plastic instability; Strain rate sensitivity;

    机译：奥氏体Fe-Cr-Ni合金;超细晶粒;温度;塑性不稳定性;应变率敏感性;

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