改良9Cr-1Mo鋼強化組織消失のメカニズムの検討

  • 篠崎 太一
    東北大学大学院工学研究科ファインメカニクス専攻
  • 鈴木 研
    東北大学大学院工学研究科附属先端材料強度科学研究センター
  • 三浦 英生
    東北大学大学院工学研究科附属先端材料強度科学研究センター

書誌事項

タイトル別名
  • Degradation Mechanism of the Strengthening Micro Texture of Modified 9Cr-1Mo steel

抄録

<p>In this study, in order to clarify the fracture mechanism of a modified 9Cr-1Mo steel under fatigue loading at elevated temperatures, the change in the lath martensitic strengthening micro texture of fractured specimens after rotary bending fatigue tests was investigated by using EBSD (Electron Back-Scatter Diffraction) analysis. Average KAM values obtained from the EBSD analysis clearly decreased with the increase of stress amplitude during the fatigue test at temperatures higher than 550oC. However, the KAM value did not decrease at 500oC. Therefore, there should be critical values for not only stress amplitude but also temperature which induce the change in the lath martensitic strengthening micro-texture.</p>

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