薄板試験片を用いたサンプリングクリープ試験による改良9Cr-1Mo鋼のクリープ損傷評価法の検討

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タイトル別名
  • Study on Creep Damage Assessment Method for Mod. 9Cr-1Mo Steel by Sampling Creep Testing with Thin Plate Specimen
  • ウスイタ シケンヘン オ モチイタ サンプリングクリープ シケン ニ ヨル カイリョウ 9Cr-1Moコウ ノ クリープ ソンショウ ヒョウカホウ ノ ケントウ

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<p>This study presents creep damage assessment method for Mod. 9Cr-1Mo steel by sampling creep testing with thin plate specimen. Tensile creep rupture tests were performed using three different sizes of specimen under two different test environments to verify the creep testing with the thin plate specimen. Time to rupture of Mod. 9Cr-1Mo steel using three different sizes were almost same. In addition, there was no effect of environment on time to rupture. Pre-damaged thin plate specimens were machined from a bulk specimen’s gage section that pre-damage test was performed with. Pre-damage based on life fraction rule were 8%, 16% and 25%. No effect of the process of machining pre-damaged specimen on time to rupture was confirmed by verification tests in same test condition as pre-damage test. Stress acceleration creep rupture tests were performed to estimate creep damage assessment. Creep damage assessment by stress acceleration creep rupture tests was sufficiently accurate estimate. Creep damage assessments by Vickers hardness and lath width were compared with the assessment by stress acceleration creep rupture tests to study applicability of these methods.</p>

収録刊行物

  • 材料

    材料 68 (5), 421-428, 2019-05-15

    公益社団法人 日本材料学会

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