Influence of heat treatment on the microstructure evolution and elevated temperature mechanical properties of Hastelloy-X processed by laser directed energy deposition

•Laser Directed Energy Deposited Hastelloy-X in as-built and heat-treated conditions.•Fine dendrites with segregations and carbide precipitation in as-built condition.•Recrystallized equiaxed grains in heat-treated condition.•Strength and ABI hardness decreased with an increase in test temperature.•Yield strength of heat-treated samples are close to conventional samples.