Evaluation of creep damage of Ni-base superalloy by analyzing crystal orientation using EBSP method

R. Takaku, D. Saito, Y. Yoshioka

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

In this study, EBSP (electron backscatter diffraction pattern) method was applied to evaluate changes in crystal orientation during creep deformation. The tested material was Ni-base superalloy, Hastelloy X, and creep tests were conducted at 1123K under the stress of 49MPa. Two different phenomena, which were the change of misorientation in each grain and the change of grain orientation distribution, were observed. Degree of the misorientation increased with creep damage and especially showed a good correlation with creep strain larger than about 5%. The change of the grain orientation distribution showed that grains having the crystal orientation of <101> toward the stress axis decreased with creep damage, while <001> or <111> increased. These two different phenomena were quantitatively correlated with creep damage by several parameters and these parameters were thought to be effective for the evaluation of local damages of heat resisting metals.

Original languageEnglish
Title of host publicationMaterials Science and Technology Conference and Exhibition 2009, MS and T'09
Pages760-770
Number of pages11
Publication statusPublished - 2009 Dec 1
Externally publishedYes
EventMaterials Science and Technology Conference and Exhibition 2009, MS and T'09 - Pittsburgh, PA, United States
Duration: 2009 Oct 252009 Oct 29

Publication series

NameMaterials Science and Technology Conference and Exhibition 2009, MS and T'09
Volume2

Other

OtherMaterials Science and Technology Conference and Exhibition 2009, MS and T'09
CountryUnited States
CityPittsburgh, PA
Period09/10/2509/10/29

Keywords

  • Assessment
  • Creep
  • EBSP
  • Orientation

ASJC Scopus subject areas

  • Materials Science(all)

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