About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
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Symposium
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Deformation-induced Microstructural Evolution during Solid Phase Processing: Experimental and Computational Studies
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Presentation Title |
Studies on Defect- and Chemical Diffusion Driven Rapid Consolidation of New Ni Alloys |
Author(s) |
Yannick Naunheim, Christopher A Schuh |
On-Site Speaker (Planned) |
Yannick Naunheim |
Abstract Scope |
Additive manufacturing is an emerging pathway to produce metallic materials, usually by processing a well-established, commercial alloy via a powder-based approach. In this talk, we aim to invert this classical design approach: we selectively tailor and adjust the chemical composition of the alloy powder to make it suitable for rapid low-temperature solid-state consolidation. Acceleration of the consolidation process is based on two mechanisms: Nanocrystallinity achieved by high energy ball-milling can accelerate diffusion at low temperatures, while in some cases phase evolution through diffusional demixing and remixing of a second solute-rich phase can encourage the formation and growth of interparticle necks upon heating. The effect of individual alloying elements on the process thermodynamics are predicted using computational thermodynamics, which in turn provides a basis for an alloy design process. Example results on sintered microstructures are presented and discussed for the case of nickel-rich alloys. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, Computational Materials Science & Engineering, Process Technology |