About this Abstract |
| Meeting |
MS&T25: Materials Science & Technology
|
| Symposium
|
High-Entropy Materials: Solid Solutions, Intermetallics, Ceramics, Functional Materials and Beyond VI
|
| Presentation Title |
Cryogenic deformation behavior of the L12-precipitation strengthened FeNiCrCu-based ferrous alloy |
| Author(s) |
Jin-Seob Kim, Jin-Kyung Kim |
| On-Site Speaker (Planned) |
Jin-Seob Kim |
| Abstract Scope |
Hydrogen energy systems require the development of alloys with superior cryogenic strength and toughness. Austenitic stainless steels are promising cryogenic materials due to their excellent cryogenic toughness; however, their low yield strength is a limitation. This study investigated the L12-precipitation strengthened FeNiCr-based alloy system, which shows excellent cryogenic mechanical properties. The reduced FCC stability from decreased Ni was compensated by adding Cu. Recrystallization annealing and prolonged aging of the cold-rolled material led to intragranular L12 nano-precipitates and discontinuous precipitates at grain boundaries. STEM-EDS analysis revealed that the L12 precipitates are enriched in Ni, Al, Ti, and Cu. The material demonstrated a superior balance of cryogenic strength and ductility, and we discuss its cryogenic deformation mechanisms. |