| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
2024 Technical Division Student Poster Contest
|
| Presentation Title |
SPG-67: High-temperature and High-pressure Water Chemical Wear Characteristics of Cobalt-free Reduced Activation Hard-facing Material for Light Water Reactor Valves |
| Author(s) |
Jongmin Han, JoongHoon Kim, Tai-Bong Son, Myung-Sub Roh, Jin Young Park, Daegeun Nam, Jong Bae Jeon, Byoungkoo Kim |
| On-Site Speaker (Planned) |
Jongmin Han |
| Abstract Scope |
Discs and seats of nuclear power plant (NPP) valves are used in wear environments where large contact forces are applied at high temperatures. Accordingly, high Cobalt (Co) Stellite6 hard-facing, a wear-resistant material, is being applied to improve component lifespan. However, Co is converted into gamma radiation-emitting nuclides, Co-60 and Co-58, when wear debris is subjected to neutron irradiation in a nuclear reactor core. In this study, Co-free materials Colmonoy4, Colmonoy5, Derolo50, and Derolo50-WC composite were selected, and TIG and laser hard-facing were performed on stainless steel 410. A pin-on disk wear test was performed on the hard facing material in room temperature (RT) air, RT water, RT / 150 atm water, and 343°C / 150 atm water. The wear weight loss, wear mark morphology, microstructure were compared with that of conventional Stellite6 hard-facing. Through this study, the wear mechanism of the materials was derived in a NPP simulation environment. |
| Proceedings Inclusion? |
Undecided |
| Keywords |
Nuclear Materials, Copper / Nickel / Cobalt, Surface Modification and Coatings |