Interface coherency strain relaxation due to plastic deformation in single crystal Ni-base superalloys

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

6 Scopus Citations
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Author(s)

  • T. K. Liu
  • G. L. Wu
  • C. K. Liu
  • Z. H. Nie
  • T. Ungár
  • Y. D. Wang

Detail(s)

Original languageEnglish
Pages (from-to)83-87
Journal / PublicationMaterials Science and Engineering A
Volume568
Publication statusPublished - 15 Apr 2013
Externally publishedYes

Abstract

The micromechanical behavior under compression for a cube-oriented single crystal Ni-base superalloy was in-situ studied by synchrotron high energy X-ray diffraction at room temperature. Both elastic and plastic deformation altered the mismatch strain between γ and γ' phases with different variances. The deformation-induced interface coherency strain relaxation was observed after yielding as evidenced by an increment of lattice mismatch and an abnormal decrease in full width at half maximum (FWHM), which is attributed to aggregating of dislocations toward phase boundaries. A dislocation-mismatch model is proposed to correlate the relative change in lattice mismatch and FWHM during deformation, which fits the experiment well. © 2013 Elsevier B.V.

Research Area(s)

  • Lattice mismatch, Ni-base Superalloys, Plastic deformation, Relaxation, Strain measurement, Synchrotron X-Ray

Bibliographic Note

Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to lbscholars@cityu.edu.hk.

Citation Format(s)

Interface coherency strain relaxation due to plastic deformation in single crystal Ni-base superalloys. / Liu, T. K.; Wu, G. L.; Liu, C. K. et al.
In: Materials Science and Engineering A, Vol. 568, 15.04.2013, p. 83-87.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review