|About this Abstract
||Materials Science & Technology 2020
||Powder Metallurgy of Light, Reactive and Other Non-ferrous Metals
||The Role of Processing and Texture on the Dynamic Mechanical Behavior of Powder Metallurgy Processed Ti-6Al-4V
||James D. Paramore, Brady G. Butler, Matthew K. Dunstan, Hongjoo Rhee, Haitham El Kadiri , Wilburn Ray Whittington, Shiraz Mujahid
|On-Site Speaker (Planned)
||James D. Paramore
Hydrogen sintering and phase transformation (HSPT), a powder metallurgy process, has been previously shown to produce desirable microstructures in Ti-6Al-4V components with corresponding excellent static and fatigue tensile properties. In the current study, three microstructures produced by HSPT and one produced by traditional wrought processing were tested under compression at strain rates of 0.001, 0.1, and >1000 s<sup>-1</sup>. The wrought condition exhibited the best toughness at 0.001 s<sup>-1</sup>, but had the worst performance at both 0.1 and >1000 s<sup>-1</sup> strain rates. From microstructural analyses, it is shown that the wrought condition had strong crystallographic texture consistent with hot rolling above the β-transus temperature. It is proposed that this texture made the wrought material susceptible to relatively early-onset shear banding at all but the lowest strain rate. This texture does not form in the HSPT microstructures.