About this Abstract |
| Meeting |
11th Conference on Trends in Welding Research + Additive Manufacturing (TWR+AM)
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| Symposium
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11th Conference on Trends in Welding Research + Additive Manufacturing (TWR+AM)
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| Presentation Title |
Investigating the Large Scale Wire Arc Additive Manufacturability of Super Duplex Stainless Steel: Microstructure and Mechanical Behavior Perspectives |
| Author(s) |
Prayag Burad, KR Ramkumar, Vishal Mahey, Yamamoto Yukinori, Andres Marquez Rossy, Riley Wallace, Andrzej Nyczc, Amlan Kar, Grant Crawford, Sougata Roy |
| On-Site Speaker (Planned) |
Prayag Burad |
| Abstract Scope |
In this effort, we deposited the tallest wall of super duplex stainless steel (SDSS) leveraging Wire Arc Additive Manufacturing (WAAM) technique to demonstrate its potential on large-scale SDSS part development with a high degree of uniformity in materials states. The microstructure and phase distribution shows dominance of austenitic morphologies and formation of secondary austenite (γ2) throughout the wall due to the relatively slow cooling rate in WAAM process. Consistent microhardness was observed along the build/scan directions. Tensile testing indicated higher strength in horizontal compared to vertically oriented samples, invariant across the build wall. Ductile-to-brittle transition behavior was captured on fabricated samples between 150°C to -120°C. Fracture surfaces showed temperature-dependent features as low-temperature showed faceted regions, indicating brittle behavior, while room- and high-temperature exhibited well-defined dimples, with ductile failure. This uniformity in structure-properties highlights the reliability of the large-scale WAAMed SDSS for critical applications ranging from marine to energy sectors. |
| Proceedings Inclusion? |
Undecided |