Real-time study of transients during hightemperature creep of an Ni-base superalloy by far-field high-energy synchrotron X-ray diffraction

Roxane Tréhorel, Gabor Ribarik, Thomas Schenk, Alain Jacques

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

The high-temperature mechanical behavior of single-crystal Ni-base superalloys has been formerly studied by in situ triple-crystal synchrotron X-ray diffractometry (TCD). However, the 1/300 s recording frequency does not allow real-time tests. It is shown here that real-time monitoring is possible with far-field diffractometry in transmission. The use of a far-field camera enables one to follow a diffraction spot with high angular precision and high recording speed. This technique allows measurement of the mechanical response of an AM1 Nibase single-crystal superalloy following steep load jumps and relaxations during high-temperature creep tests. Local crystal misorientation is revealed and rafting (oriented coalescence) is examined. This new technique is compared with TCD, in order to highlight its benefits and drawbacks.

Original languageEnglish
Pages (from-to)1274-1282
Number of pages9
JournalJournal of Applied Crystallography
Volume51
Issue number5
DOIs
Publication statusPublished - Oct 2018

Keywords

  • Far field
  • Misfit
  • Ni-base superalloys
  • Transmission geometry
  • X-ray diffraction

ASJC Scopus subject areas

  • Biochemistry, Genetics and Molecular Biology(all)

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