Microstructural stability of a multiphase Ni-25Al-15Cr(at. pct) intermetallic alloy

摘要

The microstructure of multiphase Ni-25Al-15Cr(at. pct)intermetallic alloy consists of dendritic arms(β-NiAl phase)and interdendritic regions(γ/γ'two phases)under homogenization followed by air cooling condition. Furnace cooling following homogenization does not significantly influ- ence its microstructure. However, the effects of aging treatment on the microstructure strongly depend on cooling rates following homogenization.