CAJ | 학술논문

通过对不同温度下6151-T6合金的研究，获得了一种基于可靠性理论的裂纹扩展速率表达式，为预测6151-T6铝合金构件的安全寿命提供依据。该表达式表明，在高温条件下，6151-T6铝合金疲劳裂纹扩展存在门槛值，而且该门槛值会随着环境温度的升高而降低。
통과대불동온도하6151-T6합금적연구，획득료일충기우가고성이론적렬문확전속솔표체식，위예측6151-T6려합금구건적안전수명제공의거。해표체식표명，재고온조건하，6151-T6려합금피로렬문확전존재문함치，이차해문함치회수착배경온도적승고이강저。
Fatigue crack growth rate of AA 6151-T6 in high temperature was tested. The fatigue crack growth rate formula was obtained based on reliability theory. The result showed that fatigue crack growth of AA 6151-T6 exists threshold value in high temperature, which decreases with temperature increasing. The purpose was to provide reference for safe life prediction of AA 6151-T6 component.The present thesis made a research on the fatigue crack growth rate of AA 6151-T6 subjected to various elevated, and proposed a reliability based formula to evaluate FCG, which provided the basis of 6151-T6 aluminum alloy component safe life prediction. The method demonstrates the existence of fatigue crack growth threshold value of 6151-T6 aluminum alloy subjected to elevated temperature, which decreases with temperature increasing.