| About this Abstract |
| Meeting |
MS&T22: Materials Science & Technology
|
| Symposium
|
Additive Manufacturing Modeling, Simulation, and Machine Learning: Microstructure, Mechanics, and Process
|
| Presentation Title |
Crystal Plasticity Modeling Effort to Capture Microstructural Variations in Cold Sprayed Materials |
| Author(s) |
Aulora Gail Rusk, Yubraj Paudel, Ryan Cochran, Shiraz Mujahid, Marc Pepi, Hongjoo Rhee, Peter Czech |
| On-Site Speaker (Planned) |
Aulora Gail Rusk |
| Abstract Scope |
Microstructures and mechanical properties of cold spray additively manufactured Aluminum 6061 showed non-uniformity with spatial variation in microstructure and mechanical properties affecting the overall response of the additively manufactured parts. The high-velocity impact of powder particles created intersplat boundaries with regions of high dislocation densities and sub-grain structures. Full-field crystal plasticity simulations showed that the distribution of smaller grains along the intersplat regions is responsible for localized stress spots and larger grains away from intersplat boundaries accommodate initial plasticity. In this work, we attempt to implement the effects of grain size and distribution of smaller grains along intersplat boundaries using the grain size and powder size distribution function to accurately predict the deformation response of cold sprayed material using a mean-field viscoplastic self-consistent model. Then, the model was calibrated, validated, and verified using uniaxial tension and compression data at various strain rates. |