| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing: Marine Materials and Structures
|
| Presentation Title |
Understanding the Influence of Precipitation on Fatigue Crack Growth and Cyclic Stress Strain Behavior in an Additively Manufactured Cu-based Alloy |
| Author(s) |
Nathan Heniken, Jiashi Miao, Veronika Mazanova, Aeriel Murphy-Leonard |
| On-Site Speaker (Planned) |
Nathan Heniken |
| Abstract Scope |
The current investigation explores the role of microstructure and precipitation on the evolution of deformation and damage in a wire-arc additively manufactured (WAAM), nickel-aluminum-bronze (NAB) alloy. NAB is a microstructurally and compositionally complex alloy with the ability to precipitate several different second phase particles known as the κ-phases during processing and/or subsequent heat treatments. Flat, rectangular, dog bone and compact-tension specimens were extracted from the WAAM bars and subjected to load controlled, tension-compression, and tension-tension, cyclic loading conditions. Samples were also loaded under monotonic, tension conditions. A unique methodology combining electron microscopy (scanning, transmission), electron channeling contrast imaging (ECCI), and electron back scatter diffraction (EBSD) with in-SEM and ex-situ loading was employed to understand dislocation interactions during fatigue. Under both loading conditions, planar dislocation slip was prevalent throughout grains leading to the formation of persistent slip bands. However, under cyclic conditions, cross-slip was observed in some grains. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Characterization, Mechanical Properties |