Microstructural and properties evolution of austenitic heat resistant steel after addition of aluminium
Effect of aluminium on microstructure and properties of austenitic heat resistant steel was investigated. The results showed that Al addition led to formation of spheroidal and dispersed Ni3Al. After solution treatment, Ni3Al particles experienced a significant refinement from 1.5 μm to nanoscale (∼80 nm). Matrix transformed from austenite to ferrite when addition of Al was >4.72%. Oxidation resis