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Effect of hydrogen-induced plasticity on the stress corrosion cracking of X70 pipeline steel in simulated soil environments

机译:氢诱导塑性对X70管线钢在模拟土壤环境中应力腐蚀开裂的影响

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摘要

The susceptibility to stress corrosion cracking (SCC) of X70 pipeline steel under cathodic protection in near-neutral pH and acidic solutions was investigated by slow-strain-rate tensile test, circumferential-notch tensile (CNT) test, and three-point-bending (TPB) test Results confirmed the existence of a hydrogen-induced plasticity (HIP) effect within a particular range of cathodic potentials. HIP effect lowered the SCC risk of X70 steel by releasing stress concentration at crack-initiation spots and then decreasing the stress intensity. Crack-growth behavior examined by CNT and TPB tests proved the existence of an HIP effect.
机译:通过慢应变速率拉伸试验,周向缺口拉伸试验(CNT)和三点弯曲试验,研究了X70管线钢在近中性pH和酸性溶液中阴极保护下的应力腐蚀开裂(SCC)敏感性。 (TPB)测试结果证实在特定的阴极电位范围内存在氢诱导的可塑性(HIP)效应。 HIP效应通过释放裂纹起始点处的应力集中,然后降低应力强度来降低X70钢的SCC风险。通过CNT和TPB测试检查的裂纹扩展行为证明了HIP效应的存在。

著录项

  • 来源
    《Materials Science and Engineering》 |2016年第21期|348-354|共7页
  • 作者单位

    Corrosion and Protection Center, University of Science and Technology Beijing, Beijing 100083, China,Key Laboratory of Corrosion and Protection of Ministry of Education, Beijing 100083, China;

    Corrosion and Protection Center, University of Science and Technology Beijing, Beijing 100083, China;

    Corrosion and Protection Center, University of Science and Technology Beijing, Beijing 100083, China,Key Laboratory of Corrosion and Protection of Ministry of Education, Beijing 100083, China;

    Corrosion and Protection Center, University of Science and Technology Beijing, Beijing 100083, China,Key Laboratory of Corrosion and Protection of Ministry of Education, Beijing 100083, China;

    Corrosion and Protection Center, University of Science and Technology Beijing, Beijing 100083, China,Key Laboratory of Corrosion and Protection of Ministry of Education, Beijing 100083, China,Ningbo Institute of Material Technology & Engineering, Chinese Academy of Sciences, Ningbo 315201, Zhejiang, China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Pipeline steel; Hydrogen induced plasticity; Stress corrosion cracking; Soil environments;

    机译:管线钢;氢致可塑性;应力腐蚀开裂;土壤环境;

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