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Meeting 2025 TMS Annual Meeting & Exhibition
Symposium Spatially Tailored Materials: Processing-Structure-Properties
Presentation Title Oxygen-induced elemental segregation as a pathway for evolving new microstructures in IV-based BCC refractory alloys
Author(s) Ravit Silverstein, Florent Mignerot, Nicoló Maria della Ventura, Jeremiah Thomas, Julia Pürstl, Anton Van Der Ven, Carlos G Levi, Tresa M Pollock, Daniel S Gianola
On-Site Speaker (Planned) Ravit Silverstein
Abstract Scope Interstitial engineering is an emerging strategy for tailoring mechanical properties in metastable BCC refractory alloys, utilizing oxygen interstitials to induce phase transformations that enhance mechanical performance. Despite its potential, the full implications of competing phase transformations, microstructures, and their effects on dislocation interactions remain unclear. Notably, inconsistencies in reported phase instabilities and deformation mechanisms in BCC Ti alloys position the concentrated Ti-Nb alloy as an ideal system for investigating these phenomena in more complex alloys. In this study, we demonstrate that incorporating interstitials in dilute concentrations can effectively promote nanoscale architectures in Ti-Nb alloys, achieving elevated strength levels and mitigating the typical strength-toughness tradeoff. We employ phase evolution investigations, coupled with 4D-STEM and small-scale mechanical testing, to elucidate the underlying deformation mechanisms. Our findings highlight the competition between Burgers and de-Fontaine transformation pathways and propose strengthening models based on structural wavelength, providing insights into the design of high-performance refractory alloys.
Proceedings Inclusion? Planned:
Keywords Mechanical Properties, High-Temperature Materials, Phase Transformations

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

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Combinatorial High Throughput Methodology: A Twinning and Phase Formation Study in CuNiAl Alloys
Combinatorial high throughput study of the interplay between microstructure and mechanical properties in Ni-Al thin films
Composition Gradient DED Printed Materials in Complex Build Geometries
Diffusion gradients to rapidly explore composition space & precipitation behaviour of bcc-superalloys and refractory high entropy alloys.
Dissolution zone model of the oxide structure in additively manufactured dispersion-strengthened alloys
Dynamic Tensile Damage and Spall Behavior of Electroplated Nickel
Effect of Zr and Sc additions on coarsening- and creep resistance of laser-melted AlSi10Mg
Effects of stacking-fault energy and thermo-mechanical treatments on evolution of heterogeneous nanostructure and mechanical properties of SUS316LN stainless steels
Evaluation of bimetallic interfaces created by directed energy deposition metal additive manufacturing
Evaluation of the mechanical and thermal properties of directed energy deposited 316L stainless steel-copper composite with complex 3D structures
Evolution of metastable phase in the chromium cladding developed over stainless steel substrate using laser directed energy deposition
Fine-Tuning of Heat Treatment Parameters for Nano-Scale Cu-Precipitates
Fundamental investigation of the interface formation of multi-material additive manufactured 316L-CuSn10 structures
Gradient alloy design guidelines via high-throughput CALPHAD-based ICME simulations with machine learning
High strain rate properties and microstructure of Fe-Cu alloys made through laser powder bed fusion
High Throughput Design of Refractory High Entropy Alloys with Improved Oxidation Resistance
Impact of heat treatments on the microstructure and mechanical properties of γ/γ' Ni-based superalloys produced by DED processes
Improving Interfacial Performance through Directed Energy Deposition of Additively-Graded Combustion Chambers
Integrated Computational-Experimental Framework for Production of Additively Manufactured Functionally Graded Materials from Structural to Refractory Alloys
Measurement of the Temperature Dependence of Plastic Deformation Localization for Rapid Microstructure-Property Relationships Identification Across Temperatures
Mechanical and Material Characterization of BP-DED Ti-Nb-Cu Functionally Graded Materials
Mechanical characterisation of micro-architected AM lattices using X-ray computed tomography
Microstructure and mechanical properties of in-situ alloyed steels via wire arc directed energy deposition
Multi-material PBF-LB additive manufacturing of aluminum and copper combinations
Multiscale characterization of an additively manufactured property graded Ni-base alloy for molten-salts\supercritical-CO2 heat exchangers
Optimizing The Kinetic Properties of Materials Gradients
Oxygen-induced elemental segregation as a pathway for evolving new microstructures in IV-based BCC refractory alloys
Oxygen-Induced Hierarchical Heterogeneities and Enhanced Hardness in RMPEAs
Phase evolution and mechanical behavior of sputtered Cu-Fe alloys
Precipitation Behavior in a Soft Magnetic, Multi-Component Alloy using Single Laser Tracks
Production and validation of refractory functionally graded materials using CALPHAD-assisted path planning for property predictions
Research progress of continuous graded alloy fabrication by LPBF
Solute Redistribution in Functionally Graded Materials: An Operando Study of Cu-Al Alloys
The Role of Heterogeneous Microstructure on the Corrosion Resistance of Wire-arc Directed Energy Deposited Iron-based High Entropy Alloys
The topology of nano- and mesoporous metal networks and its impact on structural-mechanical behavior from in-situ xray nanotomography experiments
Thermal Stability and Microstructural Evolution in Compositionally Graded Refractory Alloys
Tools for tailoring properties in functionally graded materials
Updated High-Throughput Rapid Experimental Alloy Development

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