About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
|
Symposium
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Additive Manufacturing: Length-Scale Phenomena in Mechanical Response
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Presentation Title |
Microstructures and Mechanical Behavior of Laser Additively Manufactured Multiphase Fe-based Alloys |
Author(s) |
Amit Misra |
On-Site Speaker (Planned) |
Amit Misra |
Abstract Scope |
Multiphase microstructure control in laser additive manufacturing of metallic alloys is shown to produce unusual microstructures with phase dimensions in the micro to nanometer range. In this presentation, examples from binary Fe-Cu and ternary Fe-Ni-Cr alloys processed by laser beam directed energy deposition and powder bed fusion respectively will be highlighted. In Fe-Cu, the deposited microstructures contain both equilibrium, FCC Cu and BCC Fe, as well as metastable FCC Fe and BCC Cu nano-precipitates. In Fe-Ni-Cr, depending on the chemical composition and homogeneous or heterogeneous alloy powder mixture, the microstructure may involve FCC and BCC phases of different size ranges. The unusual mechanical behavior, particularly, high strength and high strain hardening rate as elucidated by small scale mechanical tests will be presented. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, Mechanical Properties, Characterization |