304ステンレス鋼における疲労き裂伝播速度およびストリエーション間隔の温度および応力拡大係数依存性
1975 年 39 巻 10 号 p. 1003-1010
詳細
1975 年 39 巻 10 号 p. 1003-1010
The influence of the temperature and the stress intensity factor upon the fatigue crack propagation rate dC⁄dN and the striation spacing in the same materials has experimentally been studied in order to get the similarity and dissimilarity between them. The material used is 304 stainless steel. Fractographic studies were also made.
Within the range of stress intensity factor used and the temperature range from 24 to 400°C, both dC⁄dN and the striation spacing are in good agreement with the Arrehenius type equation and the apparent activation energies are linear to the logarithm of stress intensity factor just similar to the case of aluminum alloy previously studied. From 500 to 700°C, dC⁄dN obeys another Arrehenius type equation.
