This work presents the microstructural investigation of an in situ synthesized TiB/Ti6Al4V-ELI composite that was manufactured with additive manufacturing (AM) technique known as laser metal deposition (LMD). A single-track sample was manufactured by adding TiB2 to Ti6Al4V-ELI at mass deposition volume of 5% and characterized for microstructure and hardness. It was found that in situ reaction promoted the formation of quasi-continuous network microstructure of TiB whiskers with a needle-like morphology, in a martensitic a' matrix. Furthermore, the manufactured TiB/Ti6Al4V-ELI presented two different grain growth morphologies, with smaller and large TiB network grains observed at the top and bottom of the sample, respectively, due to heat travelling direction. A high hardness of 513 HV was observed at the top of the sample, which was reduced to 483 HV at the bottom, promoted by grain growth.
Reference:
Lekoadi, P.M., Tlotleng, M., Siyasiya, C. & Masina, B.N. 2023. Investigation of network microstructure of TiB/Ti6Al4V-ELI composite manufactured with laser metal deposition. MRS Advances, 8. http://hdl.handle.net/10204/13567
Lekoadi, P. M., Tlotleng, M., Siyasiya, C., & Masina, B. N. (2023). Investigation of network microstructure of TiB/Ti6Al4V-ELI composite manufactured with laser metal deposition. MRS Advances, 8, http://hdl.handle.net/10204/13567
Lekoadi, Paul M, Monnamme Tlotleng, CW Siyasiya, and Bathusile N Masina "Investigation of network microstructure of TiB/Ti6Al4V-ELI composite manufactured with laser metal deposition." MRS Advances, 8 (2023) http://hdl.handle.net/10204/13567
Lekoadi PM, Tlotleng M, Siyasiya C, Masina BN. Investigation of network microstructure of TiB/Ti6Al4V-ELI composite manufactured with laser metal deposition. MRS Advances, 8. 2023; http://hdl.handle.net/10204/13567.