| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Materials Deposition by Cold Spray and Related Technologies
|
| Presentation Title |
Microstructure and Multi-scale Mechanical Properties of As-deposited and Heat-treated Cold-Sprayed Scalmalloy-Al7075 Deposits |
| Author(s) |
Anil Lama, Denny John, Tanaji Paul, Arvind Agarwal |
| On-Site Speaker (Planned) |
Anil Lama |
| Abstract Scope |
Limited strength of cold-sprayed Aluminum alloys for load-bearing applications can be improved by tailoring feedstock composition. In this study, a 1:1 mixture of Scalmalloy-7075 powders was used to fabricate cold-sprayed deposits using helium (He-deposit) and nitrogen (N2-deposit) as carrier gases. Microstructural analysis revealed a bimodal distribution of grain size with enhanced splat flattening and lower porosity in the He-deposit, indicating severe plastic deformation. This increased deformation resulted in 20% higher nanohardness in the He-deposit compared to the N2-deposit. As the scale of measurement progressed to micro and bulk levels, larger microstructural features such as pores and inter-splat bonding became evident, with He-deposit demonstrating 12% higher microhardness, 28% higher yield stress, and 11% higher ultimate tensile strength than N2-deposit. Further improvements in hardness and strength were observed after post-heat treatment of the deposits, highlighting the potential of tailored compositions and heat treatment to achieve strengths surpassing those of state-of-the-art Al7075. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Aluminum, Mechanical Properties |