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Meeting 2022 TMS Annual Meeting & Exhibition
Symposium Advances in Titanium Technology
Presentation Title Transformations in TRIP/TWIP Ti alloys studied via in-situ methods
Author(s) Fan Sun, Bingnan Qian, Lola Lilensten, Philippe Vermaut, Frédéric Prima
On-Site Speaker (Planned) Fan Sun
Abstract Scope The presentation focuses on the in-situ studies of transformations in TRIP/TWIP Ti alloys including thermally induced omega precipitations. The deformation-induced transformations lead to complex microstructure due to simultaneous activation of various types of twinning and stress-induced martensite. Such active microstructural responses to strain/stress result in important improvements of strain-hardenability and ductility of the alloy. For a better understanding of the mechanisms, the deformation-induced twinning/martensite have to be studied via in-situ EBSD/TEM under mechanical loading because some transformations are reversible. Moreover, the strengthening of TRIP/TWIP Ti alloy via isothermal omega precipitation can be achieved by increasing the CRSSs of the deformation-induced twinning/martensite without suppressing them. Remarkable improvement on tensile strength (470 -> ~900MPa) is obtained without ductility (40%) trade-off on a simple Ti-12Mo. The omega precipitation is investigated by in-situ resistivity measurements and in-situ TEM under heating.
Proceedings Inclusion? Planned:
Keywords Phase Transformations, Mechanical Properties, Titanium

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

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Anomalous c+a Dislocation Activity in TIMETAL-407
Assessing The Variability In Mechanical Properties Of Biocompatible Ti-13Nb-13Zr Titanium Alloy With Respect To Thermomechanical Treatments And Associated Microstructures.
Beta Ti alloys with increased oxygen content and TRIP/TWIP effect
Characterization and slip of <a> screw dislocation in pure hcp α titanium from atomistic simulations
Characterization of Nanoscale Metastable Phases in a TRIP Titanium Alloy
Critical comparison of estimation of critical resolved shear stress from slip line trace analysis and spherical indentation protocols and Bayesian learning techniques for Ti 6Al-2Sn-4Zr-2Mo and Ti 6Al-2Sn-4Zr-6Mo alloys
Cu solubility extension in TiNiCu shape memory alloy for low-fatigue elastocaloric material
Defect Engineering for Heterogeneous and Adaptive Microstructures
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Developing new metastable beta-titanium alloys and optimizing their properties through heat-treatments
Development of a Phenomenological Equation to Predict Yield Strength in Additively Manufactured Ti-5Al-5V-5Mo-3Cr
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Effect of aging treatment on microstructure and superelastic properties of a high Zr-containing Ti–Zr–Nb–Sn shape memory alloy
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Fatigue Behavior of Additively Processed, PVD Coated Ti-6Al-7Nb Alloy for Biomedical Applications
Formation of {11-22} contraction twins in titanium through reversible martensitic phase transformation
Grain boundary segregation and its implications regarding the formation of the grain boundary α phase in the metastable β-Titanium Ti–5Al–5Mo–5V–3Cr alloy
Heterogeneous and cooperative deformation in two-phase titanium alloys: slip initiation, transfer, and their effects on strain localization
Hierarchical α Microstructure in a Metastable β Ti-5Al-5Mo-5V-3Cr Alloy
High-temperature oxidation behavior of dilute Ti-Si alloys at 800 °C
In-Situ Synchrotron X-Ray Diffraction of High Strain Rate Deformation of TRIP/TWIP Ti-Mo Alloys
Local Distortion Effects on the Dynamic Lattice Stability in the BCC Phase of Titanium and its Alloys: An Ab-initio Study
Mechanical behavior of Ti-Ni-Fe based B2 Pseudo Binary intermetallic at different length scales
Mechanical behavior of Ti alloys in relation to the microstructure across lengthscales
Micromechanical fracture behavior of distinct interfaces in an intermetallic TiAl alloy
Microstructural and Mechanical Properties Structural Repairs of near α and near ß Titanium Alloys by Additive Friction Stir Deposition
Microstructural evolution and mechanical properties of additively manufactured commercially-pure Grade 2 Titanium after post-process heat treatment
Microstructural Scale Evolution of Titanium Alloys during Additive Manufacturing
Microstructure Evolution in Additively Manufactured Ti-5Al-5Mo-5V-3Cr Alloy
Microstructure Formation in Titanium Alloys
Microstructure in the Extrusion-Based 3D Printed Biomedical Used Ti-6Al-4V
Microstructure in the Selective Laser Melted Ti-48Al-2Cr-2Nb Alloy
Microstructure, transformation behavior and superlasticity of an aged Ti-40Ni-12Cu (at. %) shape memory alloy
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Monte Carlo Simulations for Texture-Controlled Grain Growth During Beta-Annealing of Ti-6Al-4V
Multiscale Modeling of Metal-Hydrogen Interactions: A Case Study of Hydride Formation in Titanium
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Origin of enhanced ductility in TiAl alloys caused by reducing activation difference of deformation mechanism of γ-phase
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Preparation of TiAl alloy by magnesium aluminum synergistic reduction of TiO2 in molten salt medium
Role of Defects in Alpha Precipitation in Metastable Beta Ti-5Al-5Mo-5V-3Cr Alloy
Strengthening of Ti-6Al-4V/TiC Composites
Surface Analysis, Microstructure Characterization, and ISV modeling of Electron Beam Melted (EBM) Ti-6Al-4V
The Effect of Sample Size and Plastic Behavior on the Validity of Sub-scale Mechanical Testing of Titanium Alloys
The formation of titanium ultrafine laminar microstructures via additive manufacturing
The influence of Fe and Al on the microstructure and mechanical performance of Ti-Cr alloys
The Intermediate Temperature Mechanical Behaviour of a near-α Titanium Alloy: Experiments and Modeling
Thermohydrogen Refinement of Microstructure of AM Titanium Components
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Titanium metal matrix composites via selective laser melting
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Transformations in TRIP/TWIP Ti alloys studied via in-situ methods
TRIGGERING NEW DEFORMATION MECHANISMS IN Ti ALLOYS BY HEAT TREATMENTS: a step forward into the improvement of the ductility and work-hardening of 3D printed parts
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