|About this Abstract
||2023 TMS Annual Meeting & Exhibition
||Advances in Titanium Technology
||Pathways to Engineer High Strength Coupled with High Strain Hardenability and Ductility in Metastable β-Titanium Alloys
||Abhishek Sharma, Srinivas Aditya Mantri, Nartu Mohan Sai Kiran, Sriswaroop Dasari, Ravisankar Haridas, Riyadh Salloom, Fan Sun, Frederic Prima, Hamish Fraser, Srinivasan Srivilliputhur, Rajarshi Banerjee
|On-Site Speaker (Planned)
Traditionally, increase in the tensile yield strength of Ti alloys is accompanied by substantial reductions in strain-hardenability and ductility. Metastable β-Titanium alloys often exhibit high strain hardenability and ductility due to TRIP/TWIP effects but offer relatively low yield strengths. However, these alloys offer a wide processing window resulting in distinctly differing microstructural templates. While these microstructural templates comprise of various stable and metastable phases (α, αʹ, αʹʹ, ω-phase, etc.) it is their size scale, morphology, and microscopic dispersion in the β matrix that determine the macroscopic mechanical properties. Such microstructures principally involve a β-solutionized microstructure aged below/above the ω solvus temperatures for a short-term/long-term heat-treatment and/or combined with prior/post plastic deformation (cold-rolling). This presentation discusses possible microstructural design pathways towards engineering high yield strength in such systems, while maintaining TRIP/TWIP effects, resulting in a better balance of strength-strain hardenability-ductility.
||Titanium, Phase Transformations, Mechanical Properties