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Meeting 2022 TMS Annual Meeting & Exhibition
Symposium Additive Manufacturing Fatigue and Fracture: Developing Predictive Capabilities
Presentation Title Machining vs Heat Treatment in Additive Manufacturing of Ti6Al4V Alloy
Author(s) Alireza Dareh Baghi, Shahrooz Nafisi, Reza Hashemi, Heike Ebendorff-Heidepriem, Reza Ghomashchi
On-Site Speaker (Planned) Shahrooz Nafisi
Abstract Scope Anisotropy in the mechanical properties of Laser Powder Bed Fusion (L-PBF)-fabricated titanium parts which could be problematic in service, is dependent on the build directions, and may be mitigated by post fabrication treatments such as surface machining or heat treatment. However, investigation of the anisotropy in truly as-printed conditions, i.e., prior to any post process, is always a challenge as the horizontally built parts are noticeably distorted compared to vertically built ones. In this study, by deploying a novel design, straight horizontal samples in the as-printed condition were fabricated. This allowed a comparison to be made possible in the mechanical properties of two built orientations of vertical and horizontal in the as-printed condition. This paper discusses how the surface machining or post thermal treatment influences the anisotropy in the mechanical properties compared to as-printed conditions. It further highlights how annealing process at a temperature of 850C is more effective than stress relieving at a temperature of 670C to nearly diminish the anisotropy in mechanical properties even without any need for machining. Therefore, when machining becomes less feasible due to the geometrical complexity of L-PBF parts, a thermal treatment may be the solution for better service performance.
Proceedings Inclusion? Planned:
Keywords Additive Manufacturing, Titanium, Mechanical Properties

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

A Method to Predict Critical Pore/Defect Size in Laser Powder Bed Fusion Additively Manufactured Ti-6Al-4V Parts
Accelerated Corrosion Behavior of Cold Spray Deposited AA2024 and AA7075 and Implications for Mechanical Performance
Additive Manufacturing Surface Roughness Formation, Characterization, and Influence on Fatigue Performance
Candidate Methods to Assess Structural Integrity of Higher-criticality AM Components
Characterization of Additively Manufactured 17-4 PH Steel Structure with Ultrasonic Technique
Cold Spray for Aircraft Structural Repair
Comparison of Statistical Predictors of Additive Manufacturing Process-induced Defects Using Fractography and Metallography
Compression Testing and Characterization of L-PBF Ti-5Al-5V-5Mo-3C and E-PBF Ti-6Al-4V
Designing Printable Alloys for Fatigue Strength
Effect of Post Heat Treatment on Fatigue Strength of AlSi10Mg Produced by Laser Powder Bed Fusion Process
Effect of Stress State and Pores on Multiaxial Fracture of Low- and High-ductility Additively Manufactured Metals
Effect of Surface Roughness on Fatigue Behavior of 316L Stainless Steel Produced by Binder Jetting Process
Effects of Process Parameters on Fatigue Behavior and Defect Characteristics in LPBF Ti-6Al-4V
Effects of Process Parameters, Defects, and HIP Processing on S-N Fatigue of LPBF AlSi10Mg
Effects of Process Parameters, Post-processing, and Defects on Tension and Fatigue Properties of LPBF AlSi10Mg
Effects of Processing Parameters and Heat Treatments on the Mechanical Properties of SS316L Parts Repaired by Laser Metal Deposition
Environmental Cracking Behavior of Additively Manufactured 17-4PH Stainless Steel
Experiments to Enable Expert-informed Machine Learning of Fatigue Performance of DMLM Ti-6Al-4V
Fatigue Crack Initiation Behavior of Laser Beam Powder Bed Fused IN718
Fatigue Modeling Approaches for Additively Manufactured Ti-6Al-4V
Fatigue Resistance Improvement of Laser Powder Bed Fusion AlSi10Mg by Post-processing
Flaw Type Dependent Tensile Properties of 316L Stainless Steel Manufactured by Laser Powder Bed Fusion
Fracture Behavior of Laser Powder Bed Fusion Fabricated Ti41Nb via In-situ Alloying
High-strain Rate / Shock-loading Response of AM-processed Materials
High-throughput Characterization of the Fatigue Behavior of Additively Manufactured Metals toward Rapid Qualification
High Cycle Fatigue Behavior of Additively Manufactured Thin Wall Inconel 718 (Dependence on Thickness and HIP)
High Cycle Fatigue Behaviour of Additively Manufactured 316L Austenitic Stainless Steel
High Strain Rate Deformation of EBM-Ti-6Al-4V: Microstructure, Texture, Mechanical Properties, Fracture Surface, Deformation Mechanism, and Constitute Modeling
Information-rich Fatigue Fracture Surface to Evaluate Additive Manufacturing Parameters
J-5: Evaluation of Heat-treated Microstructure and Mechanical Properties of Al-Zn-Mg-Cu Plates Repaired via Additive Friction Stir-deposition
J-7: Monitoring Additive Manufacturing Process Stability with Bayesian Changepoint Detection on High-Throughput Tensile Test Data
Load-dependent Degenerating Structures in Additively Manufactured Implants
Machining vs Heat Treatment in Additive Manufacturing of Ti6Al4V Alloy
Mechanical Behaviour of Additively Manufactured Al-Alloys: Impact of Post-processing
Mechanical Properties of AM Deposited Metallic Components
Mechanism-based Characterization of the Mechanical Behavior of PBF-EB Manufactured IN718 Lattice Structures
Mesoscale Modeling of the Additively Manufactured 316L: Effects of Microstructure and Microscale Residual Stresses
Methodology of Low Cycle Fatigue Testing on Thin-walled Stainless Steel 316L Manufactured by Laser Powder Bed Fusion
Micromechanical Modeling of Porosity Defects in Additively Manufactured Alloys
Microstructure-based Fatigue Studies on Additive-manufactured Materials
Non-destructive Determination of Single Crystal Elastic Constants in Additively Manufactured Alloys by Bayesian Inference and Resonant Ultrasound Spectroscopy
On Fatigue Performance of Al-Cu-Mg-Ag-Ti-B Alloy: Additive Manufactured Versus Cast
On the Fatigue Properties of Additively Manufactured Materials Processed at Non-optimal Conditions
Powder Oxygen Heterogeneities and Significant Intra-build Tensile Strength Variation from Common EB-PBF Ti-6Al-4V Powder Reuse Methods
Predicting Structural Integrity of Additively Manufactured Parts Using Probabilistic Damage Tolerance
Prediction of Fatigue Life Based on the Microstructure and Porosity Distribution Using the Novel Computationally Efficient Multiscale Modeling
Predictive Modeling of Fracture in Anisotropic and Porous Materials
Probabilistic Methods for Additive Manufacturing – How to Understand and Manage the Uncertainty
Quantifying the Influence of Scan Strategy on the Microstructure and Fatigue Properties of SLM Inconel 718 Thin Walls
Rapid Characterization and Comparison of the Cyclic Response of Laser Powder Bed Fusion Additive Manufactured Inconel 718 Samples Using Spherical Microindentation
Rotating Bending Fatigue Behavior of EB-PBF Ti-6Al-4V with Globular Alpha Surface Layer
Short-crack Growth Behavior in Additively Manufactured AlSi10Mg
Size Effect on the Ultrasonic Fatigue Behavior of Laser-powder Bed Fusion 316L
Tailoring Hot Isostatic Pressing Treatments to Homogenize Process-dependent Microstructures and Mechanical Properties of Electron Beam Melted Ti-6Al-4V Parts
The Elevated Temperature Creep, Fatigue and Fracture Behavior of Additively Manufactured Inconel 718
The Influence of Orientation and Processing Method on Fatigue Crack Growth Behavior of AM Stainless Steel
The Role of As-built Surface Morphology in High Cycle Fatigue Failure of IN718
The Study on Microstructural Evolution during Post-processing of Additively Manufactured Ti64
The Tensile Behavior of Additively Manufactured 17-4 PH Stainless Steel with Different Heat Treatments

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