Evaluation of SCC Crack Growth Behavior of Non-Sensitized Stainless Steels in High Temperature Water by SSRT

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  • ＳＳＲＴによる非鋭敏化ステンレス鋼の高温水中ＳＣＣき裂進展挙動の評価
  • SRTによる非鋭敏化ステンレス鋼の高温水中SCCき裂進展挙動の評価
  • SRT ニ ヨル ヒエイビンカ ステンレスコウ ノ コウオン スイチュウ SCC キレツ シンテン キョドウ ノ ヒョウカ

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Description

Slow strain rate test (SSRT) method was applied to evaluate the SCC behavior of non-sensitized stainless steels in high temperature water. Crack growth rate (CGR) was evaluated by investigating the time dependence of the maximum crack depth in SSRT. The effects of materials and test conditions on the CGRs were studied. As the result, the CGR of non-sensitized 18Cr-8Ni stainless steels (SUS316, SUS304, SUS347) was in the range of (3−6)×10−10 m/s. In 316NG (nuclear grade), the CGR showed the highest at 561 K, and increased with the concentration of dissolved oxygen and conductivity. The CGR in SSRT was higher by 10 times than that obtained in the crack extension test using CT specimens.

Journal

  • Corrosion Engineering

    Corrosion Engineering 56 (6), 259-264, 2007

    Japan Society of Corrosion Engineering

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