|About this Abstract
||Materials Science & Technology 2019
||Ultra High Performance Metallic Systems for Aerospace, Defense, and Automotive Applications
||In-situ Studies of Strain Rate Effects on Phase Transformations and Microstructural Evolution in β-Titanium
||Benjamin Ellyson, Amy Clarke, Jonah Klemm-Toole, Yaofeng Guo, Jinling Gao, Wayne Chen, Niranjan Parab, Kamel Fezzaa, Tao Sun
|On-Site Speaker (Planned)
Titanium (Ti) alloys are heavily used in the aerospace and bio-medical industries, due to their exceptional specific strength and corrosion resistance. However, limited uniform elongation and low work-hardening restrict allowable deformation and absorbed energy of parts in service. Transformation-induced and twinning-induced plasticity (TRIP and TWIP, respectively) have been heavily utilized in steels to increase crash-resistance in service, circumventing the traditional strength/ductility trade-off. Recent studies have shown that metastable β-Ti alloys exhibit TRIP and TWIP during deformation, and have been reported to produce exceptionally high uniform elongation and flow stresses . This project aims to fundamentally understand microstructural evolution across multiple length scales in metastable β-Ti alloys after testing in compression and tension at different strain-rates. Preliminary studies on commercially available Ti-10V-2Fe-3Al and Ti-15Mo (wt.%) have demonstrated the feasibility of tuning deformation mechanisms and microstructural stability to obtain tailored mechanical properties by TRIP/TWIP in Ti-1023 and Ti-15M alloys.
||Definite: At-meeting proceedings