About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
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Symposium
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Fatigue in Materials: Fundamentals, Multiscale Characterizations and Computational Modeling
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Presentation Title |
Influence of Dislocation-precipitate Interactions on Fatigue Crack Initiation in Wire Arc Additive Manufactured Nickel-Aluminum-Bronze |
Author(s) |
Aeriel D. Murphy-Leonard, Veronika Mazanova |
On-Site Speaker (Planned) |
Aeriel D. Murphy-Leonard |
Abstract Scope |
Dislocation-precipitate interactions of a wire arc additive manufactured nickel-aluminum-bronze alloy subjected to uniaxial cyclic and monotonic loading were investigated in this study. A unique multi-scale methodology involving scanning transmission electron microscopy (S/TEM), electron back scatter diffraction (EBSD), and electron channeling contrast imaging (ECCI) was designed to uncover individual interactions with several κ-phase particles. A strong accumulation of dislocations along globular κII and lamellar κIII particles were observed during loading. Shearing of small, coherent κIV particles by dislocations was also observed within the matrix. These interactions provide insights into the processing parameters needed to enhance strength and the ductility of these complex microstructures. |
Proceedings Inclusion? |
Planned: |