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Meeting 2026 TMS Annual Meeting & Exhibition
Symposium Additive Manufacturing of Metals: Multiscale and Non-Equilibrium Solidification Fundamentals
Presentation Title Enhancing the microstructure of DED-produced beta Ti-Nb-Fe alloy.
Author(s) Khathutshelo Nemavhola, Wallace Matizamhuka, Nana Arthur, Ronald Machaka
On-Site Speaker (Planned) Khathutshelo Nemavhola
Abstract Scope The development of new beta titanium alloys typically relies on conventional manufacturing methods such as casting, metal forming, and machining. However, the high cost associated with these alloys stems from the complexity of traditional processing steps. Powder metallurgy offers a cost-effective alternative for producing high-quality titanium alloy components with intricate geometries. This study evaluates the optimal Direct Energy Deposition (DED) processing method and parameters for Ti-Nb-Fe alloy, comparing in-situ alloying with powder premixing. The results indicate that premixed powders yield a more uniform distribution of Nb and Fe, with fewer unmelted Nb particles compared to in-situ alloyed samples.
Proceedings Inclusion? Planned:
Keywords Additive Manufacturing, Biomaterials, Phase Transformations

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An Overview of Current Efforts in Developing a Digital Twin Framework for Laser-based Additive Manufacturing Processes of Metallic Systems
CALPHAD-based modelling of solidification and precipitation in LPBF 17-4PH stainless steel
CALPHAD-coupled models of solidification phenomena during metal additive manufacturing
CALPHAD-guided in situ dilution for additive manufacturing of a non-printable Ni-based superalloy
Composition-sensitive modeling of alpha-morphologies during solidification and heat treatment in PBF-LB Ti-6Al-4V
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Coupled Modeling Tools for Large-Scale AM Simulations
Desktop Metal 3d Printing using (WAAM) Wire Arc Additive Manufacturing and its capabilities and testing.
Development of a Framework for Understanding and Optimization of Wire Arc Directed Energy Deposition Parameters towards Enhancement of Material Properties
Development of an Additively-Manufacturable Inconel 939-Type Nickel-Based Superalloy with Minimized Crack Susceptibility
Enhancing AA6061 Alloy Printability during the LPBF Process through Zr and TiB₂ Additions and Process Parameter Optimization
Enhancing the microstructure of DED-produced beta Ti-Nb-Fe alloy.
Evolution of Microstructure and Mechanical Properties in Laser Powder Bed Fusion Fabricated β-Ti alloy: Integrated Experimental and Computational Approach
Exploring Omega Phase Formation During DED and Its Role in Phase Evolution and Deformation Mechanism of Ti-Cr Alloys
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Mechanism of epitaxy loss and its correlation with solidification microstructure in Laser Powder Bed Fusion
Microstructure and Mechanical Properties of WAAM-Processed Aluminum Alloys with Inoculants and α-Al(Fe,Mn)Si Precipitates
Microstructure and Strengthening Mechanisms in Cu-10Sn Alloys Manufactured by Laser Beam Powder Bed Fusion
Microstructure and Thermal Behavior of Inconel–GRCop42 Dissimilar Joints Fabricated via Powder-Based Laser Directed Energy Deposition
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Modification of casting Aluminum alloys using grain refinement strategies for LPBF applications
Multilayer CFD Simulation and Crack Susceptibility Analysis in Graded Inconel 718–SS 316 DED Builds
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Pathways to experimental analysis of microstructure evolution in additive manufacturing
Prediction of composition-dependent grain structures in LPBF austenitic stainless steel using a two-phase cellular automata model
Process–Microstructure–Property Correlations in Cu–Ni 70/30 Additively Manufactured at Varying Energy Densities Using Laser Wire Directed Energy Deposition
Real Time Observation of Sintering Kinetics and Alloying Behaviors Using In-situ TEM Laser Heating
Revisiting the Al-Si phase diagram upon a broad range of cooling rates
Solidification Behavior and Weldability of Cu-based Feedstock Processed with Directed Energy Deposition
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