| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing: Microstructural and Mechanical Long-term Stability of AM Materials
|
| Presentation Title |
Microstructural and mechanical analysis of high strength steel thin walls produced by wire arc additive manufacturing |
| Author(s) |
Ebrahim Harati |
| On-Site Speaker (Planned) |
Ebrahim Harati |
| Abstract Scope |
Wire arc additive manufacturing (WAAM) has attracted significant interest due to its fast deposition rates and economical material usage. This study employed Gas Metal Arc Welding (GMAW) in Cold Metal Transfer (CMT) mode to build thin walls using high-strength steel wires with argon-8% CO2 or argon-18% CO2 shielding gases. Optical and scanning electron microscopy revealed microstructures characterized by grain boundary ferrite, acicular ferrite, martensite, and bainite, influenced more by cooling rates than by the type of shielding gas. Tensile and impact Charpy tests were performed in both horizontal and vertical orientations. While the shielding gas type had minimal impact on yield and tensile strengths, it significantly affected elongation and impact toughness, with 8% CO2 yielding higher values compared to 18% CO2. Vertical samples displayed superior impact toughness over horizontal samples, otherwise demonstrating isotropic properties. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Iron and Steel, Mechanical Properties |