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Ferrite phase transformation in dual-phase steel under shock loading

机译：双相钢下的铁氧体相变

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摘要

Microstructural changes and ferrite phase transformation under shock loading, between 8.5 GPa and 17.5 GPa, in a hot-rolled Lean Duplex Stainless Steel (commercially known as LDX 2101) were investigated in as-received and pre-deformed conditions. The latter condition was considered to distinguish classical deformation twins at high strain rates from those associated to the reversible ferrite phase transformation. Plate impact experiments were used to introduce compressive shock loading at peak stresses below and above the stress threshold of the ferrite phase transformation, 13 GPa. Effects of shock loading were also examined by compressing shocked samples quasi-statically and comparing their response with those tested in the as-received condition. The microstructural examinations revealed that the ferrite in LDX 2101 experienced a reversible phase transformation at a peak stress of ～17 Gpa. The fingerprints for this transformation were {112}<111> primary twins and {332}<113> primary and secondary twins. In addition, the yield stress of the sample pre-shocked at ～17 Gpa showed a considerable increase (～150 Mpa) compared to the flow stress in as-received conditions.
机译：在接收和预变形的条件下研究了在热轧贫双链不锈钢中，在热轧贫双链体不锈钢中进行了抗冲击率下的微观结构变化和铁氧体相变。后一种条件被认为以与可逆铁氧体相转化相关的那些以高应变率区分经典变形孪晶。板冲击实验用于在铁氧体相变的低于和高于铁氧体相变的峰值应力下引入压缩冲击载荷，13GPa。还通过压缩震动样品准确静态并比较其与在接受条件下测试的那些的反应来检查冲击载荷的影响。微观结构检查显示，LDX 2101中的铁氧体在〜17GPa的峰值应力下经历了可逆相变。该转化的指纹是{112} <111>初级双胞胎和{332} <113>初级和次级双胞胎。此外，与在接受条件下的流量应力相比，样品预震动的样品的屈服应力显示出相当大的增加（〜150MPa）。

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  • 来源
    《Materials Science and Engineering》 |2021年第20期|140690.1-140690.11|共11页
  • 作者

    Ali Ameri; Hongxu Wang; Zongjun Li; Zakaria Quadir; William D.A. Rickard; Manny Gonzalez; Paul J. Hazell; Juan P. Escobedo-Diaz;

  • 作者单位

    School of Engineering and Information Technology The University of New South Wales Canberra ACT 2600 Australia;

    School of Engineering and Information Technology The University of New South Wales Canberra ACT 2600 Australia;

    School of Engineering and Information Technology The University of New South Wales Canberra ACT 2600 Australia;

    Microscopy and Microanalysis Facility (MMF) John de Laeter Centre (JdLC) Curtin University Perth WA 6102 Australia;

    Microscopy and Microanalysis Facility (MMF) John de Laeter Centre (JdLC) Curtin University Perth WA 6102 Australia;

    Air Force Research Laboratory Wrighit-Patterson Air Force Base Dayton OH 45433 USA;

    School of Engineering and Information Technology The University of New South Wales Canberra ACT 2600 Australia;

    School of Engineering and Information Technology The University of New South Wales Canberra ACT 2600 Australia;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    Ferrite; Dual phase steel; Martensite; Phase transformation; Twinning;

    机译：铁氧体;双相钢;马氏体;相变;孪生;

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