| About this Abstract |
| Meeting |
MS&T22: Materials Science & Technology
|
| Symposium
|
Additive Manufacturing of Titanium-based Materials: Processing, Microstructure and Material Properties
|
| Presentation Title |
Spatially Resolving Structure-Behavior Relations in 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 reversible solid state crystallographic and microstructural phase change with the application of stress or temperature. Conventional fabrication generates a uniform alloy structure to customize SMA response. 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 allows customizing extrinsic geometrical shapes and dimensional scales and intrinsic composition and structure. We employ the Laser Directed Energy Deposition (LDED) AM technique using pre-blended elemental powder feedstock for depositing NiTi SMAs with Titanium-rich composition. As a result 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. |