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首页> 外文期刊>Journal of pipeline engineering >Assessment of residual stress, hardness, and defect tolerance in a tee joint, as-welded and after post-weld heat treatment
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Assessment of residual stress, hardness, and defect tolerance in a tee joint, as-welded and after post-weld heat treatment

机译：评估三通接头，焊接后和焊接后热处理后的残余应力，硬度和缺陷耐受性

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摘要

THE RISK OF HYDROGEN-ASSISTED cold cracking (HACC) is often conflated with the risk of brittle fracture. However, if delayed non-destructive testing (NDT) shows there are no defects, or defects below the critical crack size, then brittle fracture is not possible. Post-weld heat treatment (PWHT) is known to reduce the risk of HACC but is not always possible to perform.To assess the effects of PWHT, the residual stresses and hardness values were measured before and after PWHT to assess the effects of PWHT on HACC susceptibility and on the critical defect sizes.The residual stresses were lower than code-based estimates. PWHT reduced the residual stress and hardness, and increased the critical crack size.
机译：氢辅助冷裂（HACC）的风险通常与脆性断裂的风险混为一谈。但是，如果延迟无损检测（NDT）显示没有缺陷，或者缺陷低于临界裂纹尺寸，则不可能发生脆性断裂。焊后热处理（PWHT）可以降低HACC的风险，但并不总是可行的。为了评估PWHT的影响，在PWHT之前和之后测量残余应力和硬度值以评估PWHT对焊后热处理的影响。 HACC敏感性和关键缺陷尺寸。残余应力低于基于代码的估计。 PWHT降低了残余应力和硬度，并增加了临界裂纹尺寸。

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  • 来源
    《Journal of pipeline engineering》 |2017年第1期|27-27|共1页
  • 作者

    Michael Law; Ann Paradowska; Nicholas Hoye; Paul Grace;

  • 作者单位

    Australian Nuclear Science and Technology Organization (ANSTO), Menai, NSW,Australia;

    Australian Nuclear Science and Technology Organization (ANSTO), Menai, NSW,Australia;

    University ofWollongong,Wollongong, NSW, Australia, and ANSTO;

    Jemena, Melbourne,Victoria, Australia;

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