Self-healing behavior of Inconel 617B superalloy

Title
Self-healing behavior of Inconel 617B superalloy
Authors
서진유김한진강석현이석진이영국
Issue Date
2019-10
Publisher
Journal of alloys and compounds
Citation
VOL 805-1223
Abstract
In the present study, the self-healing behavior of Inconel 617B superalloy (617B), used as a high-temperature material, was investigated through both preliminary test consisting of room-temperature tension and annealing and creep rupture test. Micro-cracks in the solution-treated specimen, which had been fractured at room temperature, were filled in by the precipitation of M23C6 and the segregation of B, C, and S after annealing at 800  °C for 16  h. Due to this healing effect and dislocation recovery, a 33% pre-strained and annealed specimen exhibited the longer total elongation, compared to the specimen strained until fracture without annealing after 33% pre-strain. Finally, creep rupture tests revealed that the creep strength of 617B is higher than Inconel 617 superalloy (617) due to the self-healing effect by the high-temperature precipitation of M23C6 and the segregation of B, C, and S as well as grain boundary strengthening of B and C.
URI
http://pubs.kist.re.kr/handle/201004/69702
ISSN
0925-8388
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KIST Publication > Article
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