Effect of Heat Treatment Process on Microstructures and Mechanical Properties of Laser Additive Manufactured Al-Li Alloys

A review of manufacturing processes, mechanical properties and precipitations for aluminum lithium alloys used in aeronautic applications

“…Jiao et al. investigated the heat treatment microstructures, T B phase and its influence on the micro-hardness of laser additive manufactured Al–Cu–Li alloys [ 101 ], they have confirmed results in the (Xin [ 100 ] ref, they observed Also that during aging at 400 °C; the micro-hardness decreases before it reaches the maximum vAlue [ 101 ].

Fig.

…”

“…Xin et al. studied the effect of heat treatment process on mechanical properties and microstructures of laser additive manufactured 5.02w%Cu-1.04%wLi aluminum Lithium alloys, they concluded that α(Al) matrix and T B (Al 7 Cu4Li) are the main phases on as deposited microstructure with small amount of copper rich phase in the grain boundary (Xin [ 100 ]. The T B phase and copper-rich disappear after anneAling, with Al–Cu–Fe impurity phase presented in the grain boundary.…”

“…The T B phase and copper-rich disappear after anneAling, with Al–Cu–Fe impurity phase presented in the grain boundary. The solid solution quenching and heat treatment enhance microhardness and tensile strength of Al–Li alloys compared to as-deposited alloys (Xin [ 100 ]. Jiao et al.…”