About this Abstract |
Meeting |
MS&T22: Materials Science & Technology
|
Symposium
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Additive Manufacturing of Metals: Microstructure, Properties and Alloy Development
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Presentation Title |
A Direct Laser Deposition Investigation of Microstructure-Processing-Property Relationships in NbVZr-based Alloys |
Author(s) |
Katharine Padilla, Mu Li, Zhaohan Zhang, Rohan Mishra, Katharine Flores |
On-Site Speaker (Planned) |
Katharine Padilla |
Abstract Scope |
Many studies of refractory complex concentrated alloys (RCCA) focus on identifying equiatomic, single-phase solid solution alloys with high ductility and other favorable mechanical properties. However, multiphase alloys offer an additional degree of design flexibility and the potential for superior performance. In this work, we apply direct laser deposition as a rapid method to investigate the microstructure-laser processing-mechanical property relationship in NbVZr-based alloys. In NbVZr microstructural libraries synthesized under a wide range of heating and cooling rates, we observe BCC dendrites separated by two Laves phases, cubic C15 and hexagonal C14, which grow finer with decreasing heat input. Dendrite size, spacing, and morphology are correlated with laser power and travel speed. Nanoindentation experiments are performed to investigate the relationship between microstructure and mechanical properties. The same technique will be used for NbVZrMx compositional libraries, where we explore the added effects of composition variations to structure-processing-property relationships. |