Effects of the γ″-Ni3Nb Phase on Fatigue Behavior of Nickel-Based 718 Superalloys with Different Heat Treatments

The effects of the γ″-Ni3Nb phase on fatigue behavior of nickel-based 718 superalloys with standard heat treatment, hot isostatic pressing + solution treatment + aging, and hot isostatic pressing + direct aging were investigated by scanning electron microscope, transmission electron microscopy, and...

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Veröffentlicht in:	Materials 2019-11, Vol.12 (23), p.3979
Hauptverfasser:	Ling, Li-Shi-Bao, Yin, Zheng, Hu, Zhi, Wang, Jun, Sun, Bao-De
Format:	Artikel
Sprache:	eng
Schlagworte:	Aging Axes (reference lines) Crack initiation Crack propagation Experiments Fatigue cracks Fatigue life Gamma-double prime phase (crystals) Gas turbine engines Grain boundaries Heat treating High cycle fatigue High temperature Hot isostatic pressing Inclusions Laves phase Mechanical properties Microstructure Morphology Nickel Nickel base alloys Solution heat treatment Stress concentration Superalloys
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