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Meeting MS&T21: Materials Science & Technology
Symposium Processing—Microstructure—Property Relationships of Titanium and Titanium Alloys
Presentation Title P1-29: Hierarchical Twinning Microstructure in the Metastable β Ti-24Nb-4Zr-8Sn Alloy
Author(s) Wenrui Zhao, Dian Li, Yufeng Zheng
On-Site Speaker (Planned) Wenrui Zhao
Abstract Scope Ti-24Nb-4Zr-8Sn (wt.%, Ti2448) is a novel metastable β titanium alloy which has attracted significant attentions in recent years as a promising bio-medical used vanadium free titanium alloy, due to its combination of excellent properties, such as ultra-low modulus, great ductility, and excellent biocompatibility. Both twinning induced plasticity (TWIP) and transformation induced plasticity (TRIP) have been found in Ti2448, which plays important role in improving the ductility of Ti2448. In this work, the microstructure of solution-treated and cold-rolled Ti2448 alloy has been systematically investigated using scanning electron microscopy (SEM) and transmission electron microscopy (TEM). A large number of hierarchical deformation twins were observed in Ti2448 after the cold rolling process, including primary {332}<113> deformation twin and secondary {112}<111> deformation twin. Interestingly, some unusual twinning substructures were characterized in Ti2448 via TEM, which will be introduced in detail in this presentation.

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

A Data-driven Analysis for Selection and Use of Conventional Ti Alloys for Aeroengine Applications and Future Directions
Computational Polarized-Light Microscopy for Microtextured Regions Characterization in Titanium Alloys
Computational Polarized Light Microscopy for Orientation-based Quality Control
Deformation Behavior of Ti-Ni-Fe Based Ternary B2 Pseudo Binary Intermetallic
Exploiting Structural and Compositional Instabilities in Titanium Alloys to Optimize Microstructure/Property Interrelationships in Samples Fabricated by Additive Manufacuring
Influence of Athermal vs. Isothermal Omega Precipitation and Alpha Precipitation on TRIP/TWIP Deformation Mechanisms in Metastable Beta Ti alloys (invited)
Nano-scale O” Phase and Fine-scale Alpha Precipitation in a Metastable Beta Ti-5Al-5Mo-5V-3Cr Alloy
Now On-Demand Only: Strain Energy Density Fatigue Assessment of Ti-6Al-4V for Plain and Notched Geometries
Obtaining High Strength-ductility Combination inTIitanium by Microstructure and Texture Engineering through Multiaxial Plane-strain Forging
P1-29: Hierarchical Twinning Microstructure in the Metastable β Ti-24Nb-4Zr-8Sn Alloy
P1-30: Analysis of Temperature Factor Influence on the Nature of the Titanium Alloy Deformation during Extrusion
Regulating Elastic and Plastic Deformation by Heterogeneous Microstructure Design in Ti-alloys
Role of Novel Highly-indexed Twinning in Hierarchical α Microstructure in Metastable β Ti-5Al-5Mo-5V-3Cr Alloy
The BMG to Ti Weld, a Pool for Microstructure: Property Characterization
The Composition-processing-microstructure-property Relationships of Fe and Al Modified Ti-Cr Alloys

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