About this Abstract |
| Meeting |
MS&T25: Materials Science & Technology
|
| Symposium
|
Additive Manufacturing, Directed Energy Deposition of Metals: Processing – Microstructure – Mechanical Property Relationships
|
| Presentation Title |
Enhanced Grain Refinement and Mechanical Properties in WAAM 316L by Integrated Hot Forging |
| Author(s) |
Henry Leon-Henao, Kaue C. Riffel, Antonio J. Ramirez |
| On-Site Speaker (Planned) |
Henry Leon-Henao |
| Abstract Scope |
Wire Arc Additive Manufacturing (WAAM) efficiently fabricates large-scale components with high deposition rates and cost-effective equipment, but its wider adoption is limited by anisotropic mechanical properties. This study integrates WAAM with an in situ hot forging (HF) process to refine grain structure and enhance mechanical performance in 316L stainless steel. Layers were deposited robotically using Gas Metal Arc Welding (GMAW) with 316L filler wire under an argon-CO₂ shielding gas. High-speed imaging, electrical monitoring, and thermal analyses established optimal forging temperatures (950–1150°C). Finite Element Method simulations optimized the hammering positions, improving deposition stability and bead geometry. Metallography and EBSD analyses confirmed significant grain refinement and increased equiaxed zones compared to conventional WAAM. Microhardness tests showed dynamic recrystallization significantly reduced grain size, increasing hardness. Integrating hot forging with WAAM effectively improves microstructural properties and deposition quality, expanding potential industrial applications. |