Correlation between microstructure evolution and creep of alloy 263

Hee Jeong Chung, Joo Youl Huh, Woo Sang Jung

Research output: Contribution to journalArticle

Abstract

This study discusses the temperature dependence of deformation mechanisms and microstructure evolution during creep. Alloy 263 was investigated for creep under various conditions of applied stress and temperature until fracture. The crept microstructure was analyzed using electron microscopy. The analysis shows the phase reaction of MC + γ → M23C6 + (γ′, η) in creep condition takes place. Moreover, the precipitation of η, which has slower precipitation kinetics than γ′, was promoted by creep. Additionally, the interaction between γ′ and dislocations changed from shearing to by-passing with the increase of temperature because critical shear stress of each deformation mechanisms is dependent on temperature.

Original languageEnglish
Article number109847
JournalMaterials Characterization
Volume156
DOIs
Publication statusPublished - 2019 Oct 1

Keywords

  • Alloy 263
  • Creep
  • Eta
  • Gamma prime

ASJC Scopus subject areas

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

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