Creep life prediction of Ni-base superalloy used in advanced gas turbine blades by electrochemical method

Shin Ichi Komazaki, Tetsuo Shoji, Minoru Sato

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

In order to develop a methodology for creep life assessment of directionally solidified Ni-base superalloy CM247LC, commonly used in advanced gas turbine blades, changes in electrochemical property of the alloy caused by creep have been investigated. Experimental results on electrochemical polarization measurements revealed that the peak current densities `Ip' and `Ipr', which appeared at a specific potential during potentiodynamic polarization reactivation measurements in a dilute glyceregia solution, increased linearly with the life fraction at an early stage of creep life and were uniquely correlated with a newly proposed Arrhenius-type parameter `(t/tr)exp(-Qc/RT)'. The creep life fraction can be nondestructively evaluated by electrochemical polarization measurements and the above parameter.

Original languageEnglish
Pages (from-to)156-165
Number of pages10
JournalJSME International Journal, Series A: Solid Mechanics and Material Engineering
Volume43
Issue number2
DOIs
Publication statusPublished - 2000 Apr

Keywords

  • Creep
  • Electrochemical technique
  • Electrochemistry
  • Life prediction
  • Ni-base superalloy
  • Nondestructive inspection
  • γ/γ' interface

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanical Engineering

Fingerprint

Dive into the research topics of 'Creep life prediction of Ni-base superalloy used in advanced gas turbine blades by electrochemical method'. Together they form a unique fingerprint.

Cite this