About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing of Metals: Multiscale and Non-Equilibrium Solidification Fundamentals
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| Presentation Title |
Microstructure and Mechanical Properties of WAAM-Processed Aluminum Alloys with Inoculants and α-Al(Fe,Mn)Si Precipitates |
| Author(s) |
Jacob Aljundi, Aditya Pulipaka, Mo-Rigen He, Paul Sanders, Kevin Hemker |
| On-Site Speaker (Planned) |
Jacob Aljundi |
| Abstract Scope |
This study explores the manufacturing benefits of wire arc-additive manufacturing (WAAM) to enhance the properties of traditionally difficult to manufacture aluminum alloys. The aim is to utilize WAAM to refine grain size, promote equiaxed microstructures, and maintain strength at elevated temperatures by inducing sub-micron primary α-Al(Fe,Mn)Si precipitation. Solidification behavior of the composition space was modeled with Thermo-Calc non-equilibrium modules to identify promising compositions. The research compares different additive manufacturing (AM) energy sources and interpass temperatures on alloy extrusions, analyzing their impact on solidification during autogenous welding. Bayesian optimization will be applied to initial experimental results to optimize alloy compositions to target a refined, equiaxed microstructure. Microstructural and mechanical characteristics of deposited material will be analyzed as functions of the volume fraction and morphology of α-precipitates. Precipitate effectiveness and stability will be determined through sub-scale tensile testing between 25-450°C, and the efficacy of various processing routes will be compared. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Aluminum, Characterization |