|About this Abstract
|2022 TMS Annual Meeting & Exhibition
|Late News Poster Session
|A-27: Self-healing Behavior of Fe-Ni Base Superalloy Based on Spontaneous Segregation of Boron
|Chamil Kim, WooChul Kim, YongJoo Kim, WonTae Kim, Do Hyang Kim
|On-Site Speaker (Planned)
The superalloy is a material having creep resistance at high temperature, which is an important property. Recently, many studies have been conducted on self-healing as a solution to the high temperature creep resistance. Therefore, this study was conducted to improve the high temperature creep properties of Fe-Ni based superalloy from its self-healing effect of spontaneous boron segregation. δ-Ni3Nb was precipitated in grain boundary under pre-formed crack tip through annealing and it induced the segregation of boron. Boron was confirmed quantitatively through ATP. Due to this self-healing effect and dislocation recovery, a pre-strained and annealed specimen exhibited the longer total elongation, compared to the specimen without an additional element. Finally, creep test can be expected to show that the creep property of specimen with boron is higher than specimen without boron due to self-healing effect and segregation of boron which improves strength of grain boundary.
|High-Temperature Materials, Iron and Steel, Mechanical Properties