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Metastable Phases and Phase Equilibria: Towards Designing the Next Generation of Alloys: Poster Session
Sponsored by: TMS Materials Processing and Manufacturing Division, TMS: Phase Transformations Committee
Program Organizers: Bij-Na Kim; Rajarshi Banerjee, University of North Texas; Gregory Thompson, University of Alabama; Eric Lass, University of Tennessee-Knoxville; Mohsen Asle Zaeem, Colorado School of Mines; Mark Aindow, University of Connecticut; Peeyush Nandwana, Oak Ridge National Laboratory; Dinc Erdeniz, University of Cincinnati; Andrew Bobel, General Motors Corporation

Tuesday 5:30 PM
February 25, 2020
Room: Sails Pavilion
Location: San Diego Convention Ctr

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Cancelled
L-29: A New Metastable Ti Alloys with High Elastic Admissible Strain and Enhanced Ductility for Orthopaedic Application: Yidong Xu¹; Junheng Gao¹; Yuhe Huang¹; Mark Rainforth¹; ¹University of Sheffield
    In this work, a new high-performance biomedical titanium alloy Ti-5Mo-Fe-3Sn (at%) was successfully developed. Compared to beta Ti and commercial Ti-6Al-4V ELI, the formation of athermal omega phase was suppressed, resulting in extremely low elastic modulus (52GPa). Meanwhile, an excellent combination of yield strength (740MPa) and plasticity (uniform elongation ~15%) was acquired, leading to a high elastic admissible strain (1.42%), which could be regarded as the one of the best combination of mechanical parameters suitable for orthopaedic application in comparison with recent developed biomedical Ti alloys. TEM results reveal a new twin-twin mediated structure that two various {332}<113> variants and ternary {112}<111> twin are activated in primary {332}<113> twin with an increase of strain, which maintains the strain hardening rate and are responsible for the enhanced plasticity.

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