|About this Abstract
||2021 TMS Annual Meeting & Exhibition
||Deformation Induced Microstructural Modification
||Nanotwinned Titanium with Ultimate Strength-Ductility Synergy
||Shiteng Zhao, Ruopeng Zhang, Qin Yu, Robert Ritchie, Andrew Minor
|On-Site Speaker (Planned)
The pursuit of both high strength and ductility in structural materials has taken many different approaches over the years, from microstructural control to complex alloying chemistry. It has been demonstrated that the strength and ductility of alloys can be simultaneously improved with a nanotwinned microstructure. Traditional method to achieve this goal is through electrodeposition, which is only applicable for certain materials and not easily scalable. Here we show a method that achieves ultra-high strength and ductility in pure Ti at both ambient temperature and 77 K, without the need for any additives and uses a process that is easily scalable to bulk production for parts and components. The nanotwin network can be engineered into coarse grained titanium by a carefully designed cryo-mechanical processes. Additionally, it is demonstrated that the nanotwin structure is thermally stable up to 873 K, which is beyond the temperature requirements for many extreme loading environments.