|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Powder Metallurgy of Light Metals
||Microstructural Evolution and Mechanical Responses of Solid Solution Strengthened Titanium Materials with Ubiquitous Light Elements
||Takanori Mimoto, Junko Umeda, Katsuyoshi Kondoh
|On-Site Speaker (Planned)
Ubiquitous light elements (ULEs) like oxygen (O) and nitrogen (N) are the promising additive elements to achieve the high specific strength and cost-effectiveness of powder metallurgy (PM) titanium (Ti) materials. The ULEs are employed as useful reinforcements instead of the conventional alloying elements of expensive rare earth metals like vanadium (V). In the present study, nitrogen atoms were directly induced into titanium powders via gas-solid reaction process. The treated powders were consolidated by spark plasma sintering (SPS), heat-treated under vacuum atmosphere and then hot-extruded. The heat treatment (HT) dramatically improved the homogeneity of nitrogen distribution in SPSed materials. After HT and hot extrusion, the additive nitrogen atoms were uniformly dissolved into Ti matrix as solid solution reinforcement, which enhanced the mechanical responses of extruded Ti-N materials at ambient temperature. For example, extruded Ti-0.69mass%N material exhibited 1004 MPa YS, 1174 MPa UTS and 18.3% elongation in tension.
||Planned: EPD Congress Volume