About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Powder-Based Manufacturing and Repair of Large Structural Components for Critical Applications
|
| Presentation Title |
4140 Steel Cold Spray Depositions via Heat Treatment of Feedstock Powder and In-Situ Self Peening |
| Author(s) |
Nathan O. Staley, Grant Crawford, Michael Carter |
| On-Site Speaker (Planned) |
Nathan O. Staley |
| Abstract Scope |
As high costs and manufacturing time overruns become increasingly common, efficient repair of steel components using cold spray deposition technology is gaining importance. However, producing high-strength cold-sprayed materials suitable for structural steel repairs remains challenging due to intrinsic material system limitations and the cost for helium carrier gas for cold spray processing. This work aims to produce and characterize stable 4140 steel cold spray coatings for structural repair applications using nitrogen carrier gas. 4140 steel powders were heat treated under vacuum at various temperatures to evaluate how processing parameters influence mechanical properties and, consequently, cold spray-ability. To improve deposition characteristics, heat-treated powders were blended with in-situ 4140 steel peening agents. Mechanical performance was assessed using tensile strength testing, three-lug shear strength testing, microhardness testing, and nanoindentation. Powder and deposition microstructures were characterized through optical microscopy, scanning electron microscopy (SEM), electron backscatter diffraction (EBSD), and transmission electron microscopy (TEM). |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Iron and Steel, Powder Materials |