|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Powder Metallurgy of Light Metals
||Dehydrogenation Kinetics of Hydrogen Sintered Titanium
||Matt Dunstan, James Paramore, Z. Zak Fang, Mark Koopman, Pei Sun
|On-Site Speaker (Planned)
Hydrogen Sintering Phase Transformation (HSPT) is a novel powder metallurgy method for producing low-cost, ultra-fine grain titanium alloys by sintering compacts of TiH2 powder in a hydrogen atmosphere. HSPT takes advantage of phase transformations that are facilitated by the presence of dissolved hydrogen to produce unique microstructures during sintering. Therefore, HSPT is capable of producing titanium alloys with mechanical properties that compete with wrought alloys in the as-sintered state and have the capability for additional heat treatments without the need for thermomechanical processes. The final step in the HSPT process is dehydrogenation in which the residual hydrogen from sintering is removed. By annealing under vacuum or inert gas hydrogen levels below 20 ppm, well below the 150 ppm ASTM standard, are easily obtained. The kinetics of this dehydrogenation step are governed by a variety of factors, which will be discussed, including: annealing atmosphere, phase transformations, diffusion mechanisms, time, and temperature.
||Planned: EPD Congress Volume