Non-destructive evaluation of creep damage of Ni-based superalloy using a scanning blue laser microscope

Kuniaki Akahoshi, Kazuhiro Ogawa, Hideo Miura

Research output: Contribution to journalConference articlepeer-review

1 Citation (Scopus)

Abstract

In order to assure the reliability of advanced gas turbine systems, it is very important to evaluate the damage of high temperature materials such as Ni-based superalloys under creep and fatigue conditions quantitatively. The refractive index of the gamma-prime phase is found to be smaller than that of the gamma phase in the Ni-based superalloy, when the wavelength of an irradiated laser beam is shorter than 500 nm. Therefore, it is possible to evaluate the creep damage of this material quantitatively and non-destructively by observing the change of the micro texture in a grain (rafting) using a scanning laser microscope.

Original languageEnglish
Pages (from-to)2391-2394
Number of pages4
JournalKey Engineering Materials
Volume353-358
Issue numberPART 4
DOIs
Publication statusPublished - 2007 Jan 1
EventAsian Pacific Conference for Fracture and Strength (APCFS'06) - Sanya, Hainan Island, China
Duration: 2006 Nov 222006 Nov 25

Keywords

  • Creep damage
  • Ni-based superalloy
  • Non-destructive evaluation
  • Scanning laser microscope

ASJC Scopus subject areas

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

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