| About this Abstract |
| Meeting |
Materials in Nuclear Energy Systems (MiNES) 2021
|
| Symposium
|
Materials in Nuclear Energy Systems (MiNES) 2021
|
| Presentation Title |
Influence of Different Heat Treatments and Ion Irradiation on the Microstructural Evolution and Microhardness of Inconel 625 Fabricated via Laser-powder Bed Fusion |
| Author(s) |
Valentina O'Donnell, Tahmina Keya, Mohanish Andurkar, Ashley Romans, Greyson Harvill, Bart Prorok, Scott M. Thompson, John Gahl |
| On-Site Speaker (Planned) |
John Gahl |
| Abstract Scope |
The microstructure and microhardness of Inconel 625 fabricated via Laser-Powder Bed Fusion (L-PBF) was investigated in as-printed and heat-treated conditions before and after ion irradiations. Direct proton irradiation in excess of 1014 protons/cm²/s was provided using the cyclotron facility at the University of Missouri Research Reactor Center (MURR). Heat treatment temperatures (between 700 and 1050 ºC) and dwell times (1, 5, and 10 hours) were varied. Results clearly demonstrate that the as-printed Inconel 625 microstructure enables the rapid formation of intermetallic and other precipitate phases well in advance of the established wrought time-temperature-transformation (TTT) diagram. Traditional wrought homogenization procedures are not optimal for L-PBF Inconel 625. Hence, a detailed characterization of grain and precipitate evolution with respect to heat treatment and ion irradiation is provided. Results provide insight into the most appropriate heat treatment for L-PBF Inconel 625 for radiation resistance and/or hardness. |
| Proceedings Inclusion? |
Undecided |