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Meeting 2022 TMS Annual Meeting & Exhibition
Symposium Advances in Titanium Technology
Presentation Title Using Defects to Inform on Physical Phenomena in EBM Ti-6Al-4V across Scanning Strategies
Author(s) Katie O'Donnell, Maria Jose Quintana, Matthew J. Kenney, Peter C. Collins
On-Site Speaker (Planned) Katie O'Donnell
Abstract Scope The manufacture of structurally sound parts through additive manufacturing is usually achieved by reducing or avoiding defects during manufacture or post-processing heat treatments. However, defects can be used to study the physical mechanisms at play during additive manufacturing processes. Examining regions around defects in Ti-6Al-4V samples from across three different EBM scan strategies, using compositional, crystallographic, and microstructural characterization methods, have revealed information not only about defect formation mechanisms, but also residual stresses present in the build, fluid flow dynamics within melt pools before solidification, preferential vaporization of select elements, and grain growth. The free surfaces of both spherical pores and lack-of-fusion defects can also provide information on solid-state phase transitions and the timelines of defect formation. Spot-melting techniques specifically resulted in fewer overall spherical pores, as well as smaller spherical pores, leading toward techniques that might help mitigate the formation of these pores in future builds.
Proceedings Inclusion? Planned:
Keywords Titanium, Additive Manufacturing, Other

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

A Comparative Study on Mechanical Properties of Additively Manufactured Titanium Alloys
A Novel High-strength Beta Titanium Alloy Reinforced by Nanoscale Intermetallic Precipitates
A Review on Impact Resistance of Partially Filled 3D Printed Titanium Matrix Composite Designed Aircraft Turbine Engine Fan Blade
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
Defect Engineering for Heterogeneous and Adaptive Microstructures
Design and Characterization of New Metastable β Ti-Mo-Zr-Sn Alloys for Biomedical Applications
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
Effect of Aging Treatment on Microstructure and Superelastic Properties of a High Zr-containing Ti–Zr–Nb–Sn Shape Memory Alloy
Effect of Sn on Texture Characteristics and Superelastic Behavior of β-type Ti-30Zr-10Nb-xSn (x = 0, 2, 3, 4) Texture Alloy
Exploring Sub-stoichiometric Titanium Hydride Phase Space via Vacuum Hydrogen Annealing, X-ray Diffraction, and Combined Thermogravimetric Analysis/Mass Spectroscopy
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
M-1: About Dislocation Density Distribution in Titanium Alloys after Hot-deformation in the α + β Domain
M-2: Anisotropy in Tensile Properties of Ti-10V-2Fe-3Al Metastable β Alloy : An Effect of the β Structure
M-4: Microstructural Evolution and Mechanical Properties of Additively Manufactured Commercially-pure Grade 2 Titanium after Post-process Heat Treatment
M-5: Microstructure in the Selective Laser Melted Ti-48Al-2Cr-2Nb Alloy
M-7: Young Modulus and Micro-characterization of Ternary Titanium Alloys for Biomedical Applications
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 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, Transformation Behavior and Superlasticity of an Aged Ti-40Ni-12Cu (at. %) Shape Memory Alloy
Modeling Local Stress States Near Microtextured Regions in Ti64 and Implications on Dwell Fatigue Life
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
New Strain-transformable Titanium Alloys Displaying Combined TRIP and TWIP Effects: From Design Approaches to Deformation Mechanisms
NOW ON-DEMAND ONLY - Enlarging the Palette of Mechanical Properties of TI64 by a Quenching and Partitioning Approach
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
Thermohydrogen Refinement of Microstructure of AM Titanium Components
Thermohydrogen Refinement of Microstructure (THRM) to Improve the Performance of Material Extrusion Additively Manufactured Ti-6Al-4V
Titanium Metal Matrix Composites via Selective Laser Melting
Towards Sub-nanometer Scale Characterizing the ‘Real’ H in Titanium Alloy - Importance of Combined Cryogenic Focused Ion Beam & Atom Probe Tomography Technique
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
Tuning Elastic Properties of ω-phase to Engineer High Strength-ductility β-Titanium Alloys
Twins in Ti under Different Loading Conditions
Using Defects to Inform on Physical Phenomena in EBM Ti-6Al-4V across Scanning Strategies
β-titanium bcc-superalloys with Reinforcement by β' Ordered bcc TiFe Precipitates

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