Crack Initiation Mechanisms in Dwell‐Fatigue of Forged Alloy 718 Ni‐Based Superalloy
The dwell‐fatigue behavior of forged Alloy 718 Ni‐based superalloy was investigated at 610 °C, with tests performed in stress‐controlled mode at for different hold times ranging from 1 to 90 s. The cyclic life decreases with the addition of a hold time compared to pure fatigue conditions. The plastic strain rate increa...