| About this Abstract |
| Meeting |
2023 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2023)
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| Symposium
|
2023 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2023)
|
| Presentation Title |
In- and Ex-situ Neutron Characterization of Metal Additive Processes and Microstructures |
| Author(s) |
Halsey Ostergaard, Jitendra Mata, Elliot P Gilbert, Julie M. Cairney, Anna Paradowska |
| On-Site Speaker (Planned) |
Halsey Ostergaard |
| Abstract Scope |
Two novel neutron techniques in AM are demonstrated: ultra-small and small-angle neutron scattering (U/SANS) for micron and submicron precipitate analysis and in-situ diffraction during laser metal deposition (LMD). With extension into the USANS range, SANS is sensitive to precipitate structures below a few microns and provides volume-averaged data that complement other techniques. U/SANS, APT, and TEM were used to study LPBF Ni superalloy 718 and assess distribution, shape, and texture of both nano-scale intracellular strengthening precipitates as well as micron-scale intercellular delta phase precipitation. First results in 316L stainless from a new in-situ neutron system for LMD are summarized. Designed for use on multiple beamlines, the system is capable of in-situ sub-surface process monitoring in either diffraction or imaging modes. Diffraction results are correlated against ex-situ residual stress, microstructural, and hardness analyses. |
| Proceedings Inclusion? |
Definite: Post-meeting proceedings |