| About this Abstract |
| Meeting |
Materials in Nuclear Energy Systems (MiNES) 2021
|
| Symposium
|
Materials in Nuclear Energy Systems (MiNES) 2021
|
| Presentation Title |
Atom Probe Tomography Study of Elemental Segregation and Precipitation in Ion-irradiated Advance Austenitic Alloy A709 |
| Author(s) |
Dominic Piedmont, Xiang Liu, Hyosim Kim, Frank Garner, Lin Shao, T.-L. Sham, James Stubbins |
| On-Site Speaker (Planned) |
Dominic Piedmont |
| Abstract Scope |
A709 is an advanced austenitic alloy for structural applications in advanced reactors because of its high-temperature strength, corrosion resistance, and creep properties. Previous studies investigated the microstructural evolution at relatively low doses and swelling behavior at high doses. This work quantifies the dose dependence of the elemental segregation and precipitation behavior at high doses so that it could be linked with other microstructural changes, such as void swelling and the formation of network dislocations. Atom Probe Tomography (APT) was used to investigate A709 after ion-irradiated by 3.5 MeV Fe2+ ions at an irradiation temperature of 575°C to peak dpa of 100, 200, and 400. Therefore, this work addresses the need to accurately measure the compositional difference of the matrix at different doses; critical to understanding the radiation-induced segregation and precipitation of A709. As well, the possible interconnection between elemental segregation and void swelling, an aspect not well studied, is investigated. |
| Proceedings Inclusion? |
Undecided |