About this Abstract |
| Meeting |
MS&T26: Materials Science & Technology
|
| Symposium
|
2026 Graduate Student Poster Contest
|
| Presentation Title |
SPG-1: A Novel Approach to Develop Hybrid Duplex Stainless Steel Parts via Converging Laser Directed Energy Deposition and Wire Arc Additive Manufacturing |
| Author(s) |
Prayag Burad, Dongyun Lee, Peter Collins, Sougata Roy |
| On-Site Speaker (Planned) |
Prayag Burad |
| Abstract Scope |
This study explores the capabilities of hybrid wire arc (WA) and laser powder (LP) direct energy deposition (DED) for fabricating duplex stainless steel (DSS) components for demanding applications. Three LP strategies were deposited over WAAM processed DSS: (i)as-deposited (ii) equiphasic deposition achieved through in situ alloying to match WAAM austenite-ferrite fraction, and (iii)compositionally graded deposition designed to tailor phase fractions along the build height. Samples extracted according to deposition configuration were evaluated for mechanical behavior and microstructural evolution. Mosaic imaging confirmed a defect free metallurgical interface. Microstructural assessments revealed spatial variations driven by distinct thermal histories across the hybrid DED regions. Microhardness measurements showed consistently higher values in LP regions, including equiphasic and Ni enriched conditions where nickel acted as a strong austenite stabilizer. Tensile testing with digital image correlation indicated dominant strain localization in the WA region, while notched specimens enabled targeted evaluation of interfacial strengthening. |