Recrystallization of the hot isostatic pressed nickel-base superalloy FGH4096. II: Characterization and application

Yongquan Ning, Mingwang Fu, Wei Yao

Research output: Journal article publicationJournal articleAcademic researchpeer-review

25 Citations (Scopus)

Abstract

Recrystallization of the hot isostatic pressed nickel-base superalloy FGH4096 undergoes three characteristic periods, viz., incubation, nucleation and growth. Working temperature has a great effect on its boundary migration and nucleation. In recrystallization process, the nucleation rate is obviously accelerated with the increasing working temperature. To obtain fine grains, hot working should be carried out at the temperature of 1050-1080. °C. After two passes multiple forging, the grain size is significantly refined from 30.0 to 2.2. μm, and the refinement mechanism is found to be the repeated dynamic recrystallization (DRX) in the multiple forging process. Equiaxed-flatted gradient microstructure is obtained via the gradient temperature heat treatment (GTHT).
Original languageEnglish
Pages (from-to)101-106
Number of pages6
JournalMaterials Science and Engineering A
Volume539
DOIs
Publication statusPublished - 30 Mar 2012

Keywords

  • Gradient temperature heat treatment
  • Microstructure characterization
  • Nickel-base superalloy
  • Recrystallization

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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