| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Metastable Phases and Phase Equilibria: Towards Designing the Next Generation of Alloys
|
| Presentation Title |
Tuning Strength in TRIP Titanium alloys |
| Author(s) |
Benjamin Ellyson, Amy Clarke, Jonah Klemm-Toole, Kester Clarke, Yoafeng Guo |
| On-Site Speaker (Planned) |
Benjamin Ellyson |
| Abstract Scope |
Titanium (Ti) alloys are heavily used in defense, aerospace and bio-medical sectors, 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 Plasticity (TRIP) has been heavily utilized in steels to increase crash-resistance in service, circumventing the traditional strength/ductility trade-off. Some metastable β-Ti alloys have been reported to exhibit TRIP, producing exceptionally high uniform elongation and work hardening rate (WHR). However, TRIP is fundamentally misunderstood in the Titanium system and these alloys have been plagued by uncommonly low yield stresses. Recent results have revealed that aging of athermal ω-phase precipitates permits highly reproducible tuning of the yield-stress of TRIP Titanium alloys. This aging behavior is shown to affect ω-phase morphology and volume fraction, which in turn strongly affects the transformation stress for martensite. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |