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Effect of nickel on hydrogen embrittlement behavior of medium-carbon high strength steels

机译：镍对中碳高强度钢氢脆行为的影响

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摘要

The present study was attempted to explore the influence of Ni up to 1% on hydrogen embrittlement (HE) behavior of medium-carbon high strength steel by using both constant load test (CLT) and slow strain rate test (SSRT). The results show that HE index (HEI) decreases notably with the addition of 0.55% Ni, and this decreasing tendency tends to slow down with the addition of 1.02% Ni. HEI of SSRT is comparatively higher than that of CLT. The faction of brittle crack initiation area decreases with increasing Ni content. There is a decreasing tendency of both absorbed hydrogen content in Walpole solution and pre-charged hydrogen content with the addition of Ni. Both corrosion rate and pit depth of specimens after immersed in Walpole solution tend to decrease with increasing Ni content. Further electrochemical polarization test reveals that adding Ni could enhance pitting corrosion resistance. It is concluded that the addition of Ni could further lower the HE susceptibility of the tested steels mainly owing to enhanced corrosion resistance and decreased hydrogen absorption.
机译：本研究试图通过恒负荷试验（CLT）和慢应变速率试验（SSRT）来探讨高达1％的镍对中碳高强度钢的氢脆（HE）行为的影响。结果表明，当添加0.55％Ni时，HE指数（HEI）显着下降，而当添加1.02％Ni时，这种下降趋势趋于减缓。 SSRT的HEI相对高于CLT。随Ni含量的增加，脆性裂纹萌生区逐渐减少。 Wal溶液中吸收的氢含量和添加Ni的预充电氢含量都有下降的趋势。样品浸入Walpole溶液后，腐蚀速率和凹坑深度都随着Ni含量的增加而降低。进一步的电化学极化试验表明，添加Ni可以增强抗点蚀性能。结论是，添加Ni可以进一步降低被测钢的HE敏感性，这主要是由于增强的耐腐蚀性和降低的氢吸收。

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  • 来源
    《Materials Science and Engineering》 |2016年第30期|615-625|共11页
  • 作者

    Weijun Hui; Haixu Zhang; Yongjian Zhang; Xiaoli Zhao; Chengwei Shao;

  • 作者单位

    School of Mechanical, Electronic and Control Engineering, Beijing Jiaotong University, Beijing 100044, PR China;

    School of Mechanical, Electronic and Control Engineering, Beijing Jiaotong University, Beijing 100044, PR China;

    School of Mechanical, Electronic and Control Engineering, Beijing Jiaotong University, Beijing 100044, PR China;

    School of Mechanical, Electronic and Control Engineering, Beijing Jiaotong University, Beijing 100044, PR China;

    School of Mechanical, Electronic and Control Engineering, Beijing Jiaotong University, Beijing 100044, PR China;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    Nickel; Hydrogen embrittlement; Delayed fracture; High strength steel; Corrosion;

    机译：镍;氢脆延迟骨折;高强度钢;腐蚀;

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