Creep and fatigue damages of Ni-base-superalloy caused by strain-induced anisotropic diffusion of component elements

Hideo Miura, Ken Suzuki, Hiroyuki Ito, Tatsuya Inoue

Research output: Contribution to journalArticle

Abstract

The mechanism of the directional coarsening of g' phases (rafting) of Ni-base superalloy under an uni-axial strain was analyzed by molecular dynamics (MD) analysis. The stress-induced anisotropic diffusion of Al atoms perpendicular to the interface was observed clearly in a Ni(001)/Ni3Al(001) interface structure, The reduction of the diffusion of Al atoms perpendicular to the interface is thus, effective for improving the creep and fatigue resistance of the alloy. It was also found that the dopant elements in the superalloy also affected the strain-induced diffusion of Al atoms. Pd was one of the most effective elements which restrain Al atoms from moving around the interface.

Original languageEnglish
Pages (from-to)261-264
Number of pages4
JournalKey Engineering Materials
Volume417-418
DOIs
Publication statusPublished - 2010

Keywords

  • Creep
  • Fatigue
  • Molecular dynamics
  • Ni-base Superalloy
  • Stress-induced diffusion

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

Fingerprint Dive into the research topics of 'Creep and fatigue damages of Ni-base-superalloy caused by strain-induced anisotropic diffusion of component elements'. Together they form a unique fingerprint.

Cite this