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Meeting 2022 TMS Annual Meeting & Exhibition
Symposium Additive Manufacturing of Large-scale Metallic Components
Presentation Title Formation of Multiple Necks in Wire-based Electron Beam Additively Manufactured Ti-6Al-4V Pulled in Uniaxial Tension
Author(s) Daniel O. Lewis, Michael Hurst, James Paramore, Brady Butler
On-Site Speaker (Planned) Daniel O. Lewis
Abstract Scope Developed for utilization in space, Wire-based Electron Beam Additive Manufacturing (Wire EBAM) offers a novel method of producing large components or in-situ repairs under vacuum. Due to the large cooling rates associated with melt-based additive manufacturing processes, a martensitic microstructure is expected to form. To address undesirable microstructural features, Thermo Hydrogen Refinement of Microstructure (THRM) was implemented to achieve a microstructure comparable to that of wrought titanium. However, as THRM produces a hierarchical microstructure, the large, columnar beta grains initially created maintain their form as large prior-beta grains. Mechanical testing along an axis transverse to the build direction resulted in the formation of multiple necks. Although similar phenomena have been reported for Ti-6Al-4V, they are at either high strain rates or elevated temperatures. This study aims to deduce the mechanisms responsible for forming multiple necks in standard inch tensile specimens at a strain rate of 1e-5 at room temperature.
Proceedings Inclusion? Planned:
Keywords Additive Manufacturing, Characterization, Titanium

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

A Comparative Study between the Laser Metal Deposition and Selective Laser Melting of AlxCoCrFeNi MPEA
A High Fidelity Melt Pool Dynamics Model with Experimental Validation Results under Various Laser Power Densities and Scanning Speeds
An Investigation on the Capabilities of Laser Directed Energy Deposition Additive Manufacturing Process in Building Challenging Materials and Geometries
Assessment of Hybrid Additive Manufacturing Concept for Production of Parts for Space Applications
Characterization of a Large-scale 316L Body Produced with High Deposition Rate Wire Arc Directed Energy Deposition
Constitutive Modeling of Additively Manufactured Multi-phase Steel Alloys by the Crystal Plasticity Finite Element Method
Correlating Microstructure with Thermal Models in Wire-arc Additive Manufacturing of Mild Steel
Design for Metal Large-scale Additive Manufacturing: Mitigation of Bending Deformation on Curved Sheet
Experimental and Numerical Assessment of H13 Tool Steel Produced by Directed Energy Deposition
Formation of Multiple Necks in Wire-based Electron Beam Additively Manufactured Ti-6Al-4V Pulled in Uniaxial Tension
Heat Treatment Effects on Mechanical Properties of Wire Arc Additive Manufactured and Electron Beam Additive Manufactured Ti-6Al-4V
J-20: Modelling and Analysis of Single-pass Laser Cladded High Speed Steel Considering Phase Transformation Effects
J-21: Numerical Modeling of Non-equilibrium Partitioning in Copper-iron Binary Systems Manufactured by Direct Metal Deposition (DMD)
J-22: Repair of High Hard Steel Using Similar Filler Material by a Solid-state Additive Manufacturing Approach
Large Metal Structures with Wire Arc Additive Manufacturing- Case Studies with Invar Tooling and AM718 Structural Parts
Mechanical Response of Wire-arc Additively Manufactured LA100TM with and without Post-print Heat-treatments
Microstructure Control in Wire-arc Additively Manufactured Maraging Steels
Modified Inherent Strain Method for Wire Arc Additive Manufacturing
NOW ON-DEMAND ONLY - A Comparative Study of Deformation Mechanisms in 316L Stainless Steel Fabricated by Additive and Additive + Subtractive (Hybrid) Manufacturing
NOW ON-DEMAND ONLY - Process Optimization in Metal Additive Manufacturing Using Image Processing and Statistical Analysis
NOW ON-DEMAND ONLY - The Effect of Preheating Substrate on the Microstructure and Mechanical Properties in Laser Deposited Martensitic Steel
Prediction of Large Domain Thermal History and Molten Pool Shape Using the Surrogate Modeling and Machine Learning
Prior-β Grain Structure Control of Ti-6Al-4V WAAM in the As-deposited Condition
Process-structure-property Study on CP-Ti (Grade 2) Produced via High Deposition AM Laser-hot Wire
Rapid Low-temperature Bend-forming of Hierarchical Reticulated Structures
Residual Stress, Microstructure and Characterization of Self-mated Repair of Inconel 718 Using Cold Spray Process
Reverse Engineering of Aerospace Components Utilizing Additive Manufacturing Technology
The Effects of CoAl2O4 on the Microstructural Evolution of Inconel 718 Processed by Direct Energy Deposition
Wire Arc Additive Manufacturing of Nano-treated High Strength Aluminum Alloys
Wire Arc Additive Manufacturing of Stainless Steels: Kinetics Modeling of Phase Transformations Using Differential Scanning Calorimetry
Wire Arc Processing of Stainless Steels; Microstructure and Properties

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