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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.

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
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
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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