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Meeting MS&T22: Materials Science & Technology
Symposium Processing-Microstructure-Property Relationships of Titanium and Titanium Alloys
Presentation Title Hierarchical Twinning Microstructure in the Metastable β Titanium Alloys
Author(s) Dian Li, Yufeng Zheng
On-Site Speaker (Planned) Dian Li
Abstract Scope Due to the combination of great properties such as high specific strength, excellent fracture toughness, and good corrosion resistance, metastable β titanium alloys have been increasingly used as structural materials in the aerospace and biomedical industries. The room-temperature ductility of the metastable β titanium alloys can be improved by promoting the twinning induced plasticity (TWIP) and transformation induced plasticity (TRIP) effects. In this work, the micro- and nano-scale substructure of the deformation induced twinning in the metastable β Ti-24Nb-4Zr-8Sn and Ti-5Al-5Mo-5V-3Cr alloys was studied using scanning electron microscopy, transmission electron microscopy and aberration-corrected scanning transmission electron microscopy. High-index primary twin has been characterized in both alloys, with the nano-scale secondary twin formed in the interior and the nano-scale metastable phase layer formed at the twin boundary. The characteristics of these high-index deformation twins with hierarchical substructures will be introduced. This work is supported by the National Science Foundation, grant CMMI-2122272.
Proceedings Inclusion? Undecided

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

Approaches to Improving Yield-strength without Compromising Strain-hardenability in β-Titanium Alloys
Conventional Ti Alloys for Aeroengines And Aircraft Landing Gear Beams—a Data-driven Analysis for Selection of Ti-based Alloys and Future Directions
Design of New Metastable Ti Alloys and Determinations of Their Deformation Mechanisms Active during Tensile Deformation
Development of High Mechanical Strength and Low Elastic Modulus Ti-Nb-Fe-Sn-Zr Alloy for Orthopedic Implants
Dilatometric Study of Phase Transformations in Ti-407
Enhancing Low-cycle Fatigue Life of Commercially-pure Ti By Deformation At Cryogenic Temperature
Hierarchical Twinning Microstructure in the Metastable β Titanium Alloys
Insights from Three-dimensional Characterization of Twins in Titanium
Microstructure-based Equivalent Initial Flaw Size (m-EIFS) Distributions for Airframe Structural Components
Microstructure Evolution and Mechanical Behaviour of Two Phase (α+β) Ti-6Al-4V Alloy : An Effect of Heat Treatment Temperature and Duration
Nanoindentation Studies and Bulk Mechanical Properties of Additively Manufactured Titanium Alloys
Role of Oxygen on Phase Stability, Precipitation, and Deformation in Beta Titanium Alloys
Slip-twinning Interdependency in High-strength Alpha-beta Titanium Alloys
Tailoring Martensitic Transformation in Metastable Beta-Ti Alloys
Titanium Alloy Microstructures Produced by Additive Manufacturing and Deformation
Using Synchrotron X-ray Characterization to Understand Slip Processes in Titanium Alloys

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