| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Materials Deposition by Cold Spray and Related Technologies
|
| Presentation Title |
Understanding the Effect of Feedstock Microstructure on Mechanical Performance of AA7075 Cold Spray Material |
| Author(s) |
Christopher Jacob Williamson, Ning Zhu, Arthur Webb, Luke Brewer |
| On-Site Speaker (Planned) |
Christopher Jacob Williamson |
| Abstract Scope |
In this study, the effect of powder heat treatment on the mechanical performance of AA7075 materials manufactured by cold spray deposition was investigated. Mechanical testing under monotonic and cyclic loading of monolithic cold sprayed deposits revealed that both feedstock heat treatment routes tested resulted in increased ductility but at the cost of a lower ultimate strength. Solutionizing of the dendritic intermetallic structure was found to increase the fatigue life of the material well above the as-atomized and overaged samples. Fractography revealed that both the tensile and fatigue failure originated at the prior particle interfaces. TEM of the interface and prior particle interior for each condition provided key evidence for understanding both the increased ductility and fatigue life. The result of this study provides an increased understanding of the effect of initial microstructure of alloyed powder on the cold spray process in the repair of components to increase their lifetime. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Powder Materials, Aluminum |