| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing: Processing Effects on Microstructure and Material Performance
|
| Presentation Title |
Microstructure Distribution, Phase Identification, and Texture of Selective Laser Melted GRCop-84 in As-built and HIPed Conditions |
| Author(s) |
Robert Minneci, Claudia Rawn, Sudarsanam S. Babu, Michael Haines, Jeffrey R. Bunn |
| On-Site Speaker (Planned) |
Robert Minneci |
| Abstract Scope |
GRCop-84 or Cu-8 Cr-4 Nb At% is an alloy with exceptional high temperature properties developed by NASA. GRCop-84 can be formed into hardware by powder processing techniques that preserve small Cr2Nb C15 Laves phase precipitates and a relatively pure Cu matrix which yields improved thermal conductivity and mechanical strengthening. Additive manufacturing (AM) techniques like selective laser melting (SLM) has produced GRCop-84 components with properties equal to or better than traditionally wrought. EBSD, SEM, high temperature and ambient XRD have been performed on SLM samples made by NASA MSFC in as-built and HIPed conditions to investigate the microstructure. EBSD and SEM have shown complex grain structures, texture, and particle distribution caused by unique interactions of AM and the Cr2Nb particles. X-ray diffraction results have shown 0.1 At% Cr2Nb in the as-built condition that returns to 12 At% after high temperature exposures. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |