Characterization of Mn micro alloyed TiAl fabricated using Laser Engineered Net Shaping (LENS)

Microstructural, microhardness and electrochemical properties of heat-treated LENS in-situ synthesized Ti–Al-x(Mo, Si) alloys

“…This is because TiAl alloys made with standard procedures have low room temperature (RT) ductility, like cast products which has coarse microstructure and unpredictable defects, thereby having heterogenous mechanical properties [ 17 ]. The poor RT ductility is ascribed to the crystal orientation [ 18 ].…”

“…Liu et al [ 26 ], reported that adding Ta results in α 2 /γ lamellar colonies size reduction with an increase in tensile strength. Motha, Maledi and Tlotleng [ 18 ], reported that Mn addition reduces the dislocations density and inter-planar spacing leading to decrease post processing thermal cracking. However, not all the alloying elements results in the balancing of mechanical properties and oxidation resistance.…”

“…By using laser in-situ alloying to create TiAl-based alloy samples, Kanyane et al [ 48 ] investigated the influence of annealing heat treatment on mechanical characteristics and microstructural evolution. Motha, Maledi, and Tlotleng [ 18 ] investigated the impact of micro-alloying Mn into TiAl alloys that were manufactured via LENS. Along with the impact of applying post-processing step heat treatment, the impacts of varying the feed rates of Al as well as the LENS machine laser power were investigated.…”