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首页> 外文学位 >Crack growth behavior of pipeline steels in near neutral pH soil environment.
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Crack growth behavior of pipeline steels in near neutral pH soil environment.

机译：中性pH值土壤环境中管线钢的裂纹扩展行为。

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摘要

Stress corrosion cracking (SCC) from the external surface of a buried pipeline is a serious matter and can cause significant economic and environmental losses. Despite of many research works which have been done on the understanding of crack initiation and propagation mechanisms, these mechanisms are still being debated. This research studied the crack growth behaviour of different pipeline steels including two types of X65, one X52 and one X80 pipeline steels in near-neutral pH environments. Crack growth behaviour of all steels has been found to be consistent with that of true corrosion fatigue. Crack growth rates were correlated with (DeltaK)2Kmax /f0.1. It was revealed that cracking behaviour of pipeline steels in near neutral pH environments is material dependent. Highest crack growth rate was seen in the steel which highest amount of hydrogen atoms could be generated and stored in its microstructure to contribute in cracking procedure due to hydrogen embrittlement effect.
机译：来自地下管道的外表面的应力腐蚀开裂（SCC）是一个严重的问题，可能会造成重大的经济和环境损失。尽管在了解裂纹萌生和扩展机理方面已经进行了许多研究工作，但这些机理仍在争论中。这项研究研究了在近中性pH值环境下，包括两种X65，一种X52和一种X80管线钢在内的不同管线钢的裂纹扩展行为。已经发现所有钢的裂纹扩展行为与真实的腐蚀疲劳一致。裂纹扩展速率与（DeltaK）2Kmax /f0.1相关。结果表明，管线钢在接近中性pH的环境下的开裂行为与材料有关。在钢中观察到最高的裂纹扩展速率，由于氢脆效应，可以产生最高数量的氢原子并将其存储在其微观结构中，从而有助于开裂过程。

著录项

  • 作者

    Marvasti, Mohammad Hassan.;

  • 作者单位

    University of Alberta (Canada).;

  • 授予单位 University of Alberta (Canada).;
  • 学科 Engineering Civil.Engineering Materials Science.
  • 学位 M.Sc.
  • 年度 2010
  • 页码 135 p.
  • 总页数 135
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 老年病学;
  • 关键词

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