| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing: Processing Effects on Microstructure and Material Performance
|
| Presentation Title |
A-119: Localized Plastic Deformation in Thin-walled Selective Laser Melted IN718 Specimens |
| Author(s) |
Sara Messina, Chris Torbet, Chase Joslin, Michael Kirka, Matthew Begley, Tresa Pollock |
| On-Site Speaker (Planned) |
Sara Messina |
| Abstract Scope |
Additive manufacturing of structural alloys affords the opportunity to design components with complex geometries. To date, studies demonstrate the ability to additively manufacture and heat treat large components, from which test specimens can be cut and shown to possess nominal or near-nominal material properties. Because scan patterns are geometrically-dependent, solidification is less controllable for small parts where the critical dimension approaches the layer thickness. For gamma"-strengthened IN718, solidification critically affects the microstructure, which governs the mechanical properties. This study examines thin-walled selective laser melted IN718 specimens to determine the influence of microstructural and skin effects, build plate position, and build orientation on the mechanical performance of components on the order of 1 mm. It employs tensile testing with digital image correlation to reveal localized deformation, EBSD for texture information, and resonant ultrasound spectroscopy to quantify residual stress not dissipated in post-build HIP and STA treatments. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |