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首页> 外文期刊>Materials Science and Engineering >In situ investigation of the deformation behaviors of Fe_(20)Co_(30)Cr_(25)Ni_(25) and Fe_(20)Co_(30)Cr_(30)Ni_(20) high entropy alloys by high-energy X-ray diffraction
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In situ investigation of the deformation behaviors of Fe_(20)Co_(30)Cr_(25)Ni_(25) and Fe_(20)Co_(30)Cr_(30)Ni_(20) high entropy alloys by high-energy X-ray diffraction

机译：原位研究Fe_（20）CO_（30）CR_（25）NI_（25）和FE_（20）CO_（30）CR_（30）NI_（30）NI_（20）高能量X的变形行为射线衍射

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摘要

In situ synchrotron-based high-energy X-ray diffraction (HE-XRD) technique was employed to investigate the mechanical behaviors and microstructural evolution of face-centered cubic (FCC) Fe_(20)Co_(30)Cr_(25)Ni_(25) and Fe_(20)Co_(30)Cr_(20)Ni_(20) high entropy alloys (HEAs) during tensile deformation. Fe_(20)Co_(30)Cr_(30)Ni_(20) HEA has a good combination of strength (ultimate tensile strength of 864 ± 35 MPa) and ductility (elongation of 0.627 ± 0.021). The HE-XRD investigation reveals that Fe_(20)Co_(30)Cr_(30)Ni_(20) HEA has the transformation-induced plasticity (TRIP) effect, which starts at a critical stress of ～555 MPa. Transmission electron microscopy confirmed this deformation-induced new phase is hexagonal-close-packed structured ε-martensite, which follows an orientation relationship of {111}γ//(0001)γ, and <110>γ//[1120]ε. with the FCC γ matrix. The observation of deformation twins in the deformed samples of the two studied HEAs proves that twinning-induced plasticity (TWIP) effect occurs in both HEAs. The combination of TRIP and TWIP effects lead to the high strength, large ductility and improved strain hardening behavior of Fe_(20)Co_(30)Cr_(30)Ni_(20) HEA.
机译：原位同步加速X射线衍射（HE-XRD）技术用于研究以居高级（FCC）FE_（20）CO_（30）CR_（25）NI_（ 25）和Fe_（20）CO_（30）CR_（20）CR_（20）Ni_（20）在拉伸变形期间高熵合金（HEAS）。 Fe_（20）CO_（30）CR_（30）Ni_（20）HEA具有良好的强度组合（极限拉伸强度为864±35MPa）和延展性（伸长率为0.627±0.021）。 HE-XRD调查显示FE_（20）CO_（30）CR_（30）NI_（30）HEA具有转换诱导的可塑性（跳闸）效应，其效应于〜555MPa的临界应力。透射电子显微镜证实了这种变形诱导的新阶段是六边形 - 紧密填充的结构ε-马氏体，其遵循{111}γ//（0001）γ的取向关系，以及<110>γ// [1120]ε。用FCCγ矩阵。在研究的两种研究中的变形样品中的变形双胞胎的观察证明，在塞满中发生孪晶诱导的可塑性（TWIP）效应。跳闸和Twip效应的组合导致Fe_（20）CO_（30）CR_（30）HEA的高强度，大延展性和改善的应变硬化行为。

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  • 来源
    《Materials Science and Engineering》 |2020年第23期|139936.1-139936.9|共9页
  • 作者

    Ning Xu; Shilei Li; Runguang Li; Minghe Zhang; Zhiran Yan; Yuxian Cao; Zhihua Nie; Yang Ren; Yan-Dong Wang;

  • 作者单位

    Beijing Advanced Innovation Center for Materials Genome Engineering State Key Laboratory for Advanced Metals and Materials University of Science and Technology Beijing Beijing 100083 China;

    Beijing Advanced Innovation Center for Materials Genome Engineering State Key Laboratory for Advanced Metals and Materials University of Science and Technology Beijing Beijing 100083 China;

    Beijing Advanced Innovation Center for Materials Genome Engineering State Key Laboratory for Advanced Metals and Materials University of Science and Technology Beijing Beijing 100083 China;

    Beijing Advanced Innovation Center for Materials Genome Engineering State Key Laboratory for Advanced Metals and Materials University of Science and Technology Beijing Beijing 100083 China;

    Beijing Advanced Innovation Center for Materials Genome Engineering State Key Laboratory for Advanced Metals and Materials University of Science and Technology Beijing Beijing 100083 China;

    Beijing Advanced Innovation Center for Materials Genome Engineering State Key Laboratory for Advanced Metals and Materials University of Science and Technology Beijing Beijing 100083 China;

    School of Materials Science and Engineering Beijing Institute of Technology Beijing 100081 China;

    X-ray Science Division Advanced Photon Source Argonne National Laboratory Argonne IL 60439 USA;

    Beijing Advanced Innovation Center for Materials Genome Engineering State Key Laboratory for Advanced Metals and Materials University of Science and Technology Beijing Beijing 100083 China;

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  • 正文语种 eng
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  • 关键词

    High entropy alloys; Transformation-induced plasticity; High-energy X-ray diffraction; Twinning-induced plasticity;

    机译：高熵合金;转化诱导的可塑性;高能X射线衍射;孪生诱导的可塑性;

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