G030133 Effect of Aging Condition on Fatigue Strength of Maraging Steel

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  • G030133 マルエージング鋼の疲労強度に及ぼす時効条件の影響([G03013]材料力学部門一般セッション(13):疲労とき裂)

Abstract

Effects of aging structure and humidity on fatigue properties of 350 grade 18% Ni maraging steel were investigated under rotating bending in relative humidity of 25% and 85%. Aging conditions tested were a conventional single aging and a double one which was aged at low temperature after the conventional aging. In each aging, the under and the peak aged steels were prepared. Both of tensile and fatigue strengths were increased and the decrease in the fatigue strength by high humidity was suppressed by the double aging. These improvements of tensile strength and fatigue properties by the double aging were discussed from a point of the precipitated particles.

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