Simultaneous reductions of dislocation and twin densities with grain growth during cold rolling in a nanocrystalline Ni-Fe alloy

L. Li, T. Ungár, Y. D. Wang, G. J. Fan, Y. L. Yang, N. Jia, Y. Ren, G. Tichy, J. Lendvai, H. Choo, P. K. Liaw

Research output: Contribution to journalArticle

42 Citations (Scopus)

Abstract

Microstructures in nanocrystalline Ni-Fe alloys during cold rolling are quantitatively investigated by synchrotron high-energy X-ray diffraction. It is found that rolling leads to an obvious reduction in the densities of both dislocations and twins and an increase in crystallite size. A huge dislocation flux flows through the grains during rolling, even though only a small fraction remains in the specimen after rolling. A mechanically induced relaxation of the initial high-excited state of materials is revealed.

Original languageEnglish
Pages (from-to)317-320
Number of pages4
JournalScripta Materialia
Volume60
Issue number5
DOIs
Publication statusPublished - Mar 1 2009

Keywords

  • Cold rolling
  • Nanocrystalline
  • Ni-Fe alloy
  • X-ray diffraction

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys

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