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Meeting 2023 TMS Annual Meeting & Exhibition
Symposium Advances in Titanium Technology
Presentation Title Suppression of ω-phase Formation in Prototypical Metastable β-Ti Alloys
Author(s) Martin Luckabauer, Florian Brumbauer, Wolfgang Sprengel, Norihiko L Okamoto, Tetsu Ichitsubo
On-Site Speaker (Planned) Martin Luckabauer
Abstract Scope A critical characteristic of metastable β-Ti alloys is the inevitable formation of ω precipitates during certain heat treatments which leads to embrittlement, or even to a complete loss of ductility. In this work Sn an element known to influence the ω-phase formation was introduced into a β-Ti-Cr alloy to study its influence on the ω-phase formation kinetics in-situ by means of a unique high-precision laser dilatometer. Two Ti-Cr alloys, with and without the addition of Sn which were subjected to similar heat treatments consisting of solution annealing, quenching and subsequent isothermal ageing at various temperatures were studied. For the Ti-Cr alloy, the expected extensive formation of isothermal ω-phase at 250C was observed. In contrast the addition of 3at% Sn to the alloy decreased the formation rate by more than three orders of magnitude, allowing for a time-temperature processing envelope compatible with all established additive manufacturing techniques.
Proceedings Inclusion? Planned:
Keywords Phase Transformations, Characterization,

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

A Holistic Approach to Low-cost Ti
A Microstructure-informed Crystal Plasticity Based Constitutive Model for DED Ti6Al4V Alloy
Additive Manufacturing of Ti-Nb-Ta-Zr Beta Ti-Alloys
Additive Manufacturing of Titanium – Boron Carbide In situ Composites
Adiabatic Heating and Phase Transformation in Serrated Chips of Ti-6Al-4V during Turning
Atomistic Molecular Dynamics Simulations of Crack Tip Behavior in alpha-Ti
Caracterisation of the Microstructure and the Plastic Deformation in Ti-6al-4v Produced via Directed Energy Deposition
Combined Modeling-Experimental Approach for Investigating Hydrogenation of Titanium
Computational Studies of Deformation Twinning in Metastable Titanium Alloys
Cottrell Atmospheres around Screw Dislocations in alpha-Ti Alloys
Deformation Micromechanisms Observed in Binary Beta Ti Alloys Using TEM In Situ Tensile Tests
Design of Compositionally Modulated Ti-Alloys for Novel Microstructures and Exceptional Properties
Development of a Digital Twin for Characterisation of Titanium Alloy Microstructural Features Employing In-Process Machining Data
Effect of Loading Rate and Applied Potential on the Environment-assisted Cracking Behavior of ST/A Beta-C Titanium Exposed to Marine Environments
Effect of Macrozone Placement on Cracking in Bimodal Ti-6Al-4V
Effect of the Vibratory Peening Parameters on Surface Properties of Ti-6Al-4V
Effect of Volumetric Defects on the Fatigue Behavior of Laser Powder Bed Fused Ti-6Al-4V
Effects of Short-time Solution Treatment and Subsequent Short-time Annealing on the Microstructure and Deformation Behavior of Ti-6Al-4V Sheet Metal
Exploration of Young’s Modulus and Acoustic Velocity Variation in Ti-5Al-5V-5Mo-3Cr Metastable Phase Transitions
Exploring the Potential of Ti-Fe-X Systems for Design of Novel Titanium-based Superalloys
Grand Canonical Optimization of Grain Boundary Structure in Hexagonal Close-packed Titanium
High Strain Rate Deformation in Metastable β-Titanium Alloys: A Case Study of Ti-1023
Improvement of Mechanical Properties of Pure Ti by Combined Process of Multi-directional Forging and Conventional Thermo-mechanical Processing
In-situ Observation of Twinning Pathways in TRIP/TWIP Ti-12Mo Alloy
Interface and Colony Boundary Sliding as a Deformation Mechanism in Titanium Alloys
Investigation of Fine-scaled Alpha Microstructure in Metastable Beta Titanium Alloys
Investigation of Grain Boundary Precipitation in Titanium Alloys using 3D Computational Simulation and Experimental Characterization
Investigation to Density and Metallurgical Characteristics of Selective Laser Melted Ti-5Al-5V-5Mo-3Cr Vs. Ti-6Al-4V
Kinetically Induced Fine Secondary α-Ti phase Formation in a Novel As-cast Titanium Alloy
M-1: Development of a TWIP/TRIP Titanium Alloy
M-27: Investigation of Complex Microstructure in Selective Laser Melted Near Alpha Titanium Alloy Using Scanning Electron Microscopy
M-2: Effect of Micro-texture Regions on the Creep Behavior of Rolled Ti-64 with Small-scale Cantilever Bending
M-3: Numerical Analysis of Oxide Growth and Oxygen Dissolution during High-temperature Oxidation of Ti–Al Alloys
Mechanical, Thermal Conductive and Anti-wear Properties Improvement in Titanium Matrix Composites Reinforced with Graphene Nanosheets
Mechanisms of Grain Boundary α Precipitation in the Metastable β-Titanium Ti-5Al-5Mo-5V-3Cr
Nanoindentation Properties Evolution of Titanium with Different Oxygen Contents
New Insights into Oxygen-rich Alpha Titanium Alloys for Structural Applications
On the Heterogeneous and Cooperative Deformation in High-strength (α+β) Titanium Alloys
On the Relationships between Twinning and Stress-induced Martensite in Superelastic Beta Titanium Alloys
Pathways to Engineer High Strength Coupled with High Strain Hardenability and Ductility in Metastable β-Titanium Alloys
Phase Transformation Behavior during Ultrasonic Welding of Pure Ti Sheets with Fe Interlayer
Reorientation Induced Plasticity (RIP) in High-strength Titanium Alloys: An Insight into Underlying Mechanisms and Resulting Mechanical Properties
Stress Induced Martensitic Transformation and Twinning in Beta Titanium Alloys with Increased Oxygen Content
Suppression of ω-phase Formation in Prototypical Metastable β-Ti Alloys
Systematic Review of the Synthesis of Titanium Oxide Nanoparticles via Plant Mediated Green Approach
The Effect of Dilute Si/Nb Alloying on High-temperature Oxidation of Titanium
The Effects of Fe and Al Additions on the Microstructure and Mechanical Property Evolution of Ti-11at.%Cr Alloys
Ti Alloy Wire Fabrication from Waste and Out-of-Specification Particulates
Titanium Metal Matrix Composite Formation in Ternary and Quaternary Compositions and Amenability to Laser Powder Bed Fusion Techniques
Towards a Single Crack Nucleation Mechanism Involving Basal Twist Grain Boundaries in Ti Alloys
Transformation-mediated Twin Nucleation and the Temperature Dependence in Hexagonal Close-packed Metals
Tuning the Reversibility of Stress-induced Martensitic Transformation in β-metastable Titanium Alloys by Low Temperature Heat Treatment
Twin Interface Structures and Fault-energetics in HCP Materials
Understanding the Effect of Process Variables on Melt Pool Dynamics and Solidification Kinetics during Laser Spot Melting of Ti-6Al-4V Alloy Using In-situ Dynamic Synchrotron X-ray Radiography
Understanding the Role of Dual-phase Interface on the Alpha Precipitation in Metastable Beta Titanium Alloy

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