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Meeting MS&T21: Materials Science & Technology
Symposium Processing—Microstructure—Property Relationships of Titanium and Titanium Alloys
Presentation Title The Composition-processing-microstructure-property Relationships of Fe and Al Modified Ti-Cr Alloys
Author(s) Joann Ballor, Jonathan Poplawsky, Elizabeth Kautz, Bharat Gwalani, Arun Devaraj, Masahiko Ikeda, Carl J Boehlert
On-Site Speaker (Planned) Joann Ballor
Abstract Scope Low-cost beta-Ti alloys are potential replacements for heavier alloys currently used in high-strength applications. The low-cost beta-titanium alloys Ti-11Cr-xFe-xAl(at%), (0≤x≤5.3) were subjected to a 400C aging treatment under vacuum for varying times up to 12 hours to induce the beta-to-omega and/or the omega-to-alpha phase transformations. A multi-modal approach was used to obtain a comprehensive understanding of the composition-processing-microstructure-property relationships. Microstructure changes with respect to Fe and Al contents and aging times were investigated using scanning electron microscopy and transmission electron microscopy, and the omega and alpha phases were identified. Atom probe tomography reveals diffusion during the phase transformations. The alloy’s mechanical properties were investigated using tensile and hardness testing. The Ti-11Cr alloy exhibited a large increase in hardness after 0.75 hours of aging. All alloys exhibited maximum hardness after 12 hours of aging. APT was conducted at ORNL's CNMS, which is a U.S. DOE Office of Science User Facility.

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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