Title: Low Cycle Fatigue and Fatigue Crack Growth Behaviors of Alloy IN718
Abstract: The low cycle fatigue (LCF) behavior and fatigue crack growth rates (da/dN) of alloy IN718 were studied in detail at 360,550 and 650 "C, including the cycle stress-strain behavior, Massing effect, the LCF lives expressed by plastic strain energy and fatigue crack growth rates.In addition, the effect of hold time on da/dN was also discussed.The experimental results show that the da/dN is increased with the temperature increased.The effect of hold time on da/dN is very significant at 650°C, while it is a little below 550%.