About this Abstract |
| Meeting |
MS&T25: Materials Science & Technology
|
| Symposium
|
Advances in Ferrous Process Metallurgy
|
| Presentation Title |
Microstructure and mechanical properties of high nitrogen austenitic stainless steels manufactured by PM-HIP Process and the effects of Nb addition |
| Author(s) |
Byeongchan Lee, Joonoh Moon, Hyun-Uk Hong, Dongsoo Kim, Sehwan An |
| On-Site Speaker (Planned) |
Byeongchan Lee |
| Abstract Scope |
Recently, small modular reactors (SMRs) have received much attention as a new class of decarbonized nuclear reactor, which can replace conventional fossil power plants and large-scale nuclear reactors. The structural materials for SMR key component require excellent mechanical properties due to exposure to extremely severe environment. In this respect, high nitrogen austenitic stainless steels (HNSSs) have been studied a lot as candidate materials for SMR key component owing to their excellent properties. In this study, we investigated the effects of Nb addition on the microstructure and mechanical properties of HNSSs. For this purpose, HNSS samples with different Nb content were prepared by powder metallurgy and hot isostatic pressing (PM-HIP) process and subsequently heat-treated at high temperature above 1050℃ up to 1hr. The microstructures of all samples were characterized, and the mechanical properties were evaluated. Finally, the relationship between microstructure and mechanical properties was discussed. |