|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Advanced Characterization Techniques for Quantifying and Modeling Deformation
||Quantifying Microstructural Deformation in Cold Sprayed Aluminum-copper Alloy Coatings
||Tian Liu, Luke Brewer, Jeffrey Bunn, E. Andrew Payzant, Lindsay Kolbus
|On-Site Speaker (Planned)
A series of aluminum-copper alloy coatings, ranging from 2-5 weight percent copper, were produced using low-pressure cold spray deposition with helium as the carrier gas. The microstructural deformation is being characterized by EBSD, precession electron diffraction, x-ray line profile analysis, and neutron diffraction. The feedstock Al-Cu powders presented a cellular solidification structure, while the cold-sprayed coatings presented a highly deformed version of this starting microstructure. In the cold-sprayed material, the grains near the interfaces between prior particles experienced a larger deformation and were mostly recrystallized compared to the grains in the interior of the prior particles. Neutron diffraction peak breadth increased linearly with copper content, suggesting a higher degree of plastic deformation with increased alloy content. EBSD measurements showed weak fiber textures parallel to the deposition direction for this set of alloys. These microstructural changes correlate with the increased coating hardness measured for increasing copper content.
||Planned: Supplemental Proceedings volume