About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
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Symposium
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Additive Manufacturing: Length-Scale Phenomena in Mechanical Response
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Presentation Title |
Mesostructure Engineering from Random Powder Mixtures in Laser Powder Bed Fusion (LPBF) |
Author(s) |
Christopher R. Hutchinson, Erin Brodie, Huikai Li |
On-Site Speaker (Planned) |
Christopher R. Hutchinson |
Abstract Scope |
Physical mixing of powders with different chemistries has been used in laser powder bed fusion (LPBF) as a cheap way to test the printability of new compositions. The goal is usually to produce a homogeneous alloy composition, and depending on the powders and printing parameters, ‘remelting’ may be required to homogenise the chemistry. Physically mixed powders can also used to deliberately exploit the chemical heterogeneity of the powder mixture to create multiphase meso-structures in the as-built state. In some cases, these mesostructures can also be spatially controlled.
This presentation demonstrates our efforts in 3D mesostructure phase control from LPBF of a physical mixture of Ni and high-Cr stainless steel powder. We present a physically-based model to predict the chemistry distribution as a function of scan strategy, and use this to design prints with different mesostructured phase patterns. The mechanical response of these architectured materials is discussed. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, Mechanical Properties, Phase Transformations |