|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Powder Metallurgy of Light, Reactive and Other Non-ferrous Metals
||Hot Deformation Behaviors of Powder Metallurgy Ti-6Al-4V Alloy with Different Microstructures
||Pei Sun, Omar Kergaye, Z. Zak Fang, Ali Yousefiani, Austin Mann
|On-Site Speaker (Planned)
Sintering of titanium powder is typically conducted in high vacuum in conventional powder metallurgy (PM) approaches, which usually yields coarse lamellar microstructure. The hydrogen sintering and phase transformation (HSPT) process is a novel powder metallurgy method for producing Ti alloys, particularly the Ti-6Al-4V alloy, with ultra-fine microstructure in the as-sintered state. The ultra-fine microstructure can also be modified to wrought-like bimodal or globularized microstructure via simple heat treatments (without hot working). In this study, the hot deformation behaviors of PM Ti-6A-4V with coarse lamellar (vacuum-sintered), fine lamellar (HSPT) and bimodal (HSPT and heat-treated) microstructures are investigated by Gleeble tests. The microstructure, strain rate, temperature effects and possible deformation mechanisms are discussed.
||Planned: Supplemental Proceedings volume