Self-healing behavior of Inconel 617B superalloy

Seok Hyeon Kang, Sukjin Lee, Jin Yoo Suh, Han Jin Kim, Young Kook Lee

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1 Citation (Scopus)

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.

Original languageEnglish
Pages (from-to)1217-1223
Number of pages7
JournalJournal of Alloys and Compounds
Volume805
DOIs
Publication statusPublished - 2019 Oct 15

Bibliographical note

Funding Information:
We are thankful to Dr. Chang-Seok Oh (Korea Institute of Materials Science, Changwon), Mr. Young-Kwang Kim, and Professor Byeong-Joo Lee (Pohang University of Science and Technology, Pohang) for their assistances with thermodynamic calculations using Thermo-Calc software (database TTNI6). This research did not receive any specific grant from funding agencies in the public, commercial, or not-for-profit sectors.

Publisher Copyright:
© 2019 Elsevier B.V.

All Science Journal Classification (ASJC) codes

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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