About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
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Additive Manufacturing: Materials Design and Alloy Development V – Design Fundamentals
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Presentation Title |
Unique Microstructure and Phase Transformation Pathway in an Additively Manufactured 316L-ceramic Composite |
Author(s) |
Mo-Rigen He, Joesph Sopcisak, Christopher Marvel, Samuel Price, Ian McCue, Jason Trelewicz, Steven Storck, Kevin Hemker |
On-Site Speaker (Planned) |
Mo-Rigen He |
Abstract Scope |
Rational control of phase constituents and their distribution is essential for the creation of metal matrix composites with synergistic properties. To this end, additive manufacturing (AM) often results in far-from-equilibrium microstructures that provide additional avenues for material design. In this study, a novel composite produced with selective laser melting of 316L stainless steel and entrained ceramic particles is characterized with comprehensive electron microscopy techniques. The ceramic particles are fully decomposed and transformed into continuous nanolayers composed of carbides and intermetallics at the intragranular cell walls in the 316L matrix. Close inspection of the reaction zone indicates that accelerated solute diffusion along the cell walls leads to the formation of this new microstructure. The pivotal role of AM processing in the phase transformation pathway is further rationalized with thermodynamic calculations. This study demonstrates reactive additive manufacturing as a rich processing space to fabricate metal-ceramic composites with unique microstructures and superior properties. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, Characterization, Phase Transformations |