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Zn-induced liquid metal embrittlement of galvanized high-Mn steel: Strain-rate dependency

机译：锌诱导镀锌高Mn钢的液态金属脆化：应变率依赖性

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摘要

Zn-coated steel sheets suffer from Zn-induced liquid metal embrittlement (LME) during resistance spot welding and hot tensile deformation. By tensile testing at 700 and 800°C, it was found that LME of an electro-galvanized high-Mn steel sheet was suppressed at low strain rate. Such strain-rate dependency of LME has been observed in various embritdement metallic couples. Conventional ductile-to-brittle transition theory successfully explains the strain-rate reliance of LME in other embrittlement couples while it is invalid for Fe-Zn system. Owing to the high mutual solubility and several intermetallic compounds in Zn-rich regime of Fe-Zn system, the strain-rate dependency of Zn-induced LME was highly correlated with the existence of liquid Zn, which was verified by analyzing the cross section of the steel sheets.
机译：Zn涂层钢板在电阻点焊和热拉伸变形期间患有Zn诱导的液态金属脆化（LME）。通过在700和800℃下的拉伸测试，发现在低应变率下抑制了电镀锌高Mn钢板的LME。在各种壁状金属耦合中观察到LME的这种应变速率依赖性。常规的延性到脆性过渡理论成功解释了LME在其他脆化耦合中的应变率依赖，而FE-ZN系统无效。由于高溶解度和富含Fe-Zn系统的富含Zn的富含物质化合物，Zn诱导的LME的应变率依赖性与液体Zn的存在高度相关，这通过分析横截面来验证钢板。

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  • 来源
    《Materials Science and Engineering》 |2020年第19期|139996.1-139996.8|共8页
  • 作者

    Jee-Hyun Kang; Seok-Hyun Hong; Jungwoong Kim; Sung-Joon Kim;

  • 作者单位

    School of Materials Science and Engineering Institute of Materials Technology Yeungnam University Gyeongsan 38541 Republic of Korea;

    Graduate Institute of Ferrous Technology (GIFT) Pohang University of Science and Technology (POSTECH) Pohang 37673 Republic of Korea;

    School of Materials Science and Engineering Institute of Materials Technology Yeungnam University Gyeongsan 38541 Republic of Korea;

    Graduate Institute of Ferrous Technology (GIFT) Pohang University of Science and Technology (POSTECH) Pohang 37673 Republic of Korea;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    Iron alloys; Characterization; Embrittlement; Zn coating; Hot deformation;

    机译：铁合金;特征;脆化;Zn涂层;热变形;

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