Abstract：The microstructure and mechanical properties of GH4169 alloy are tested and analyzed following respective
aging treatments of GH907 and GH4169, to gain an insight into the effect of GH907 alloy aging treatment on GH4169
alloy. The results show that δ phases of GH4169 alloy during aging treatment at 775℃ increased in quantity, the γ' and γ''
phases grow slightly, but the crystal grain size do not change evidently as compared to those of GH4169 subjected to aging
treatment at 720℃ . The notched stress rupture life of the GH4169 alloy do not change significantly and is not notch sensitive
following aging treatment at 775℃ , however, the yield strength and ultimate strength at room-temperature and 650℃ ,
stress rupture life and hardness moderately diminished.
2016, 
