Texture crossover: Trace from multiple grains to a subgrain

Rozaliya I. Barabash*, E-Wen Huang, James J. Wall, James H. Wilkerson, Yang Ren, Wenjun Liu, Sven C. Vogel, Gene E. Ice, Lee M. Pike, Peter K. Liaw

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

Neutron and synchrotron X-ray diffractions were used to study the texture development in the face-centered-cubic nickel-based superalloy over gauge volumes ranging from hundreds of cubic millimeters down to sub-cubic micrometers. The bulk averaged results find a uniform texture development from collective slip. However, X-ray microbeam studies at microscale find that the plastic deformation within a single grain is mediated by limited slip, as evidenced by the local strain distribution. Polychromatic microdiffraction shows the formation of several distinct structural zones even in the same grain. A hierarchical heterogeneous geometrically-necessary dislocations arrangement and distinct slip bands are observed within each grain. A depth-dependent change of the stereographic projection within the slip band in the grain is demonstrated. Correlated oscillations of the lattice orientation at the submicron scale evolve into an overall texture at the macroscale. Possible reasons for this observed structural evolution are discussed.

Original languageEnglish
Pages (from-to)3-10
Number of pages8
JournalMaterials Science and Engineering A
Volume528
Issue number1
DOIs
StatePublished - 25 Nov 2010

Keywords

  • Crystal plasticity
  • Neutron scattering
  • Nickel-based superalloys
  • Synchrotron X-ray diffraction
  • Texture

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