中国有色金属学会会刊(英文版)
中國有色金屬學會會刊(英文版)
중국유색금속학회회간(영문판)
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
2003年
6期
1338-1341
,共4页
蔡大勇%张伟红%聂璞林%刘文昌%姚枚
蔡大勇%張偉紅%聶璞林%劉文昌%姚枚
채대용%장위홍%섭박림%류문창%요매
Inconel 718%δphase%dissolution kinetics%diffusion
Dissolution kinetics of δ phase in Inconel 718 at 980,1000 and 1020℃ respectively was established using the quantitative X-ray diffraction(XRD)method.Microstructure evolution during dissolution process was analyzed with scanning electron microscopy(SEM).Dissolution rate of δ phase during high temperature heating keeps at a high level at the beginning stage,and then decreases gradually with the increase of heating time.A dynamic equilibrium state approaches after being heated at 980℃ for more than 30 min and at 1000℃ for more than 2 h,and the equilibrium mass fraction are 3% and 0.6% respectively.δ phase fully dissolves into the austenitic matrix after being heated at 1020℃ for more than 2 h.The dissolution and fracture effects cause the morphology evolution of δphase from long needle shape to short bars or particles at high temperature.
