Evolution of internal stress field in Ni-base superalloy through creep deformation

K. Tanaka, T. Kajikawa, T. Ichitsubo, M. Osawa, T. Yokokawa, H. Harada

Research output: Contribution to journalConference articlepeer-review

12 Citations (Scopus)

Abstract

Internal elastic strain, and its change accompanied with the raft formation during creep deformation in the Ni-based single crystal superalloy (TMS-26) have been investigated by X-ray diffractometry. The elastic strain caused by the lattice misfit between γ and γ' phases has markedly been changed by creep deformation especially in the directions perpendicular to the [001] tensile axis. The change in the elastic strain can be explained by the effect of creep dislocations stacked at γ/γ' interfaces. The evolution of the elastic stress field estimated from the elastic strain has explained well the transition from primary creep stage to the second one.

Original languageEnglish
Pages (from-to)619-622
Number of pages4
JournalMaterials Science Forum
Volume475-479
Issue numberI
DOIs
Publication statusPublished - 2005 Jan 1
EventPRICM 5: The Fifth Pacific Rim International Conference on Advanced Materials and Processing - Beijing, China
Duration: 2004 Nov 22004 Nov 5

Keywords

  • Creep
  • Interfacial dislocations
  • Lattice misfit
  • Raft structure

ASJC Scopus subject areas

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

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