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Immunity of Al_(0.25)CoCrFeNi high-entropy alloy to hydrogen embrittlement

机译：AL_（0.25）高熵合金的AL_（0.25）高熵合金

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摘要

The influence of hydrogen via electrochemical charging on the mechanical behavior of the cryo-rolled and annealed Al_(0.25)CoCrFeNi high entropy alloy (HEA) through tensile experiments was investigated. The results indicated that the Al_(0.25)CoCrFeNi alloy mainly composed of FCC phase has immunity to electrochemical hydrogen embrittlement. Analysis on the fracture surfaces revealed that hydrogen permeates into a shallow depth and transforms the deformation mechanism. The deformation twins and stress-induced phase transformation (FCC-to-HCP) are introduced in the surface near fracture of tensile sample when the Al_(0.25)CoCrFeNi alloy is not charged by hydrogen. After hydrogen charging, the dissolved hydrogen decreases the stacking fault energy and promotes the planar dislocation slip, resulting in the enhancement of strength and ductility in Al_(0.25)CoCrFeNi HEA.
机译：研究了氢通过电化学充电对通过拉伸实验的冷冻轧制和退火Al_（0.25）Cocrfeni高熵合金（Hea）的力学行为的影响。 结果表明，AL_（0.25）COCRFENI合金主要由FCC阶段组成，对电化学氢气脆化具有免疫力。 裂缝表面的分析显示，氢气渗透到浅层中并转化变形机制。 当Al_（0.25）Cocrfeni合金不通过氢气充电时，将变形双胞胎和应力诱导的相变（FCC-〜HCP）引入靠近拉伸样品的裂缝附近的表面。 在氢气充电后，溶解的氢气降低堆叠故障能量并促进平面位错滑，导致AL_（0.25）COCRFENI HEA中的强度和延展性的增强。

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  • 来源
    《Materials Science and Engineering》 |2021年第21期|141590.1-141590.7|共7页
  • 作者

    Shidong Zhang; Min Liu; Yun Luo; Lianbo Wang; Zemin Wang; Zhanyong Wang; Fangjie Li; Qin shen; Xiaowei Wang;

  • 作者单位

    School of Materials Science and Engineering Shanghai Institute of Technology 100 Haiquan Road Shanghai 201418 PR China;

    School of Materials Science and Engineering Shanghai Institute of Technology 100 Haiquan Road Shanghai 201418 PR China;

    School of Materials Science and Engineering Shanghai Institute of Technology 100 Haiquan Road Shanghai 201418 PR China;

    School of Materials Science and Engineering Shanghai Institute of Technology 100 Haiquan Road Shanghai 201418 PR China;

    School of Materials Science and Engineering Shanghai Institute of Technology 100 Haiquan Road Shanghai 201418 PR China;

    School of Materials Science and Engineering Shanghai Institute of Technology 100 Haiquan Road Shanghai 201418 PR China;

    School of Materials Engineering Shanghai University of Engineering Science 333 Longteng Road Shanghai 201602 PR China;

    School of Mechanical and Automotive Engineering Shanghai University of Engineering Science 333 Longteng Road Shanghai 201602 PR China;

    School of Mechanical and Automotive Engineering Shanghai University of Engineering Science 333 Longteng Road Shanghai 201602 PR China;

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  • 正文语种 eng
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  • 关键词

    High-entropy alloy; Hydrogen embrittlement; Tensile test; Slip; Twinning;

    机译：高熵合金;氢脆;拉伸试验;滑;孪生;

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