| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing: Processing Effects on Microstructure and Material Performance
|
| Presentation Title |
A-105: Evolution of Dislocation Cell Substructure and its Effect on Precipitation Behavior in AM-IN718 |
| Author(s) |
Thomas G. Gallmeyer, Jack E. Dale, Behnam Aminahmadi, Aaron P. Stebner |
| On-Site Speaker (Planned) |
Thomas G. Gallmeyer |
| Abstract Scope |
Laser powder-bed fusion (L-PBF) processes induce rapid solidification and thermal cycling that give rise to hierarchical microstructures and anisotropic mechanical properties across an array of materials, IN718 included. One interesting aspect of the as-printed AM microstructures is the formation of a dislocation cell substructure that has been shown in influence strength and ductility in mechanical responses. As a precipitation strengthened alloy, determination of the effects of the dislocation cell substructure found in additively manufactured IN718 on microstructural evolution is crucial for understanding post-processing conditions for additively manufactured IN718. We present an investigation characterizing the nature of these dislocation cell substructures, their evolution as the result of heat treatment, and their influence on the subsequent nanoprecipitation using advanced TEM techniques. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |