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      HT-80鋼 熔接材의 熔接後熱處理時 作用應力이 疲勞龜裂進展擧動에 미치는 影響 = Effects of Applied Stress during PWHT on Fatigue Crack Growth Behaviours for the Weldment of HT-80 Steel

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      https://www.riss.kr/link?id=A3011799

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      다국어 초록 (Multilingual Abstract)

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      This study was conducted to examine the effects of the applied stress during PWHT on fatigue crack growth behaviours for the weldment of HT -80 steel. Stress during PWHT was applied to the weld HAZ in order to simulate the residual stress at welds.
      Submerged arc welding was done. Fatigue test was done at the frequency of 30Hz. The obtained data were analyzed between stress intensity factor range and crack growth rate. The fractured surface was observed by SEM and optical microscope. Crack growth rate of as -weld was slower than that of parent because of the singularities at HAZ. Crack growth rate for the specimen subjected to stress of 98Mpa was the fastest among PWHT specimens due to the precipitation of carbides which was formed during PWHT.
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      This study was conducted to examine the effects of the applied stress during PWHT on fatigue crack growth behaviours for the weldment of HT -80 steel. Stress during PWHT was applied to the weld HAZ in order to simulate the residual stress at welds. S...

      This study was conducted to examine the effects of the applied stress during PWHT on fatigue crack growth behaviours for the weldment of HT -80 steel. Stress during PWHT was applied to the weld HAZ in order to simulate the residual stress at welds.
      Submerged arc welding was done. Fatigue test was done at the frequency of 30Hz. The obtained data were analyzed between stress intensity factor range and crack growth rate. The fractured surface was observed by SEM and optical microscope. Crack growth rate of as -weld was slower than that of parent because of the singularities at HAZ. Crack growth rate for the specimen subjected to stress of 98Mpa was the fastest among PWHT specimens due to the precipitation of carbides which was formed during PWHT.

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      목차 (Table of Contents)

      • 서론
      • 實驗方法
      • 1.使用材料
      • 2.용접 및 시험편 採取
      • 3.疲勞實驗
      • 서론
      • 實驗方法
      • 1.使用材料
      • 2.용접 및 시험편 採取
      • 3.疲勞實驗
      • 實驗結果 및 考察
      • 1.母材, 용접재 및 PWHT材의 疲勞龜裂進展擧動
      • 2.微視的 考察
      • 結論
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