About this Abstract |
Meeting |
MS&T22: Materials Science & Technology
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Symposium
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Additive Manufacturing of Metals: Microstructure, Properties and Alloy Development
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Presentation Title |
Crystallographic Relationships between the Prior-beta Structure and Precipitate Phases in Additively Manufactured Nickel Aluminum Bronze |
Author(s) |
Dillon Watring, Colin Stewart, Richard W. Fonda, David J. Rowenhorst |
On-Site Speaker (Planned) |
Dillon Watring |
Abstract Scope |
Metal additive manufacturing (AM) has become a vital tool in numerous industries. Recently, wire arc additive manufacturing (WAAM) has become popular for applications of large components due to the high deposition rate and low equipment costs compared to other metal AM techniques. One specific alloy, nickel aluminum bronze (NAB), has been valued for its high strength, corrosion resistance, and cavitation resistance. Although WAAM techniques have shown advantages over traditionally cast components, there is a large amount of uncertainty surrounding the processing-structure-property relationships in WAAM metals. Specifically, when rapidly cooled, NAB produces a fine, face centered cubic (fcc) alpha phase from a coarse high-temperature body centered cubic (bcc) beta phase, along with various kappa precipitates. This work investigates the reconstructed prior beta grains in WAAM NAB while retaining the microscopy resolution necessary to resolve the fine alpha phases and precipitates and the influence of WAAM processing parameters on the microstructural features. |