|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Powder Metallurgy of Light, Reactive and Other Non-ferrous Metals
||Selective Laser Melting Based Additive Manufacturing (SLM-AM) of Commercially Pure Titanium (CP-Ti): Development of Cost-affordable Ti Powder for AM , and High-strength As-printed CP-Ti
||Ming Yan, Yuhang Hou, Dawei Wang
|On-Site Speaker (Planned)
We report two recent developments in SLM of CP-Ti:
(1)Low-cost, printable CP-Ti powder: Cost is often regarded as the bottleneck for scaling up AM-fabricated Ti products because the price of gas-atomized CP-Ti powder can be up to US$600/kg. Herein we demonstrate that ball milling can be used to modify irregularly shaped hydride-dehydride Ti powder (about US$30/kg) so that its flowability meets the requirements for laser-based AM while the impurity is under control.
(2)High-strength, as-printed CP-Ti: Although widely regarded as a detrimental impurity, nitrogen can be used as an effective alloying element for CP-Ti. Herein we used a mixture of Ar + N2 as a reactive atmosphere to enable the reaction between Ti and N2. We found that the tensile strength of the as-printed CP-Ti is up to 850 MPa, close to that of mill-annealed Ti-6Al-4V. Solution strengthening by N and precipitation of TixNy are the two major contributing factors.
||Planned: Supplemental Proceedings volume