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Meeting 2023 TMS Annual Meeting & Exhibition
Symposium Additive Manufacturing and Innovative Powder/Wire Processing of Multifunctional Materials
Presentation Title Spatially Resolving Structure-Behavior Relations in Laser Directed Energy Deposition Based Additive Manufactured Adaptive Materials
Author(s) Arnab Chatterjee, Reginald Felix Hamilton
On-Site Speaker (Planned) Arnab Chatterjee
Abstract Scope Shape Memory Alloys (SMAs) are a class of adaptive materials that undergo solid state crystallographic phase change with the application of stress or temperature. The underlying MT is reversible and enables SMAs to recover exceptionally large bulk-scale shape change, compared to conventional elastic recovery. In this work, we fabricated Nickel-Titanium based SMAs using the now well-known advanced fabrication method, additive manufacturing (AM). The layer-by-layer manufacturing customizes extrinsic geometrical shapes, dimensional scales and intrinsic composition-structure. We employ the Laser Directed Energy Deposition (LDED) AM technique using pre-blended elemental powder feedstock for depositing Titanium-rich NiTi SMAs. Because of layer/pass wise buildup, the intrinsic structural scales will vary spatially. We spatially resolve structure-behavior relations using a combined study of X-Ray and electron diffraction, optical microscopy, and microhardness. Signatures of layer/pass wise build are revealed and we produce spatial maps for contrasting the degree heterogeneity of differential LDED AM build plans.
Proceedings Inclusion? Planned:
Keywords Additive Manufacturing, Titanium, Powder Materials


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Structural Magnetic Materials Build by Cold Spray Additive Manufacturing
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