抄録
To develop a life prolongation technology, we investigated a restraint technology of fatigue crack growth (FCG). Though it was reported that paste including fine aluminum particles decelerates FCG via wedge effect, the production condition for making effective paste for the deceleration had been not clear. As the result of this study, it was appeared that the appropriate condition ranges of the paste viscosity and the aluminum diameter are 5〜50 Pa sec and 0.1〜10 μm, respectively. Also, the effect of FCG deceleration due to wedge effect was confirmed for high carbon steel, in high temperature and under random stress condition.
