Extreme elastic anisotropy of cementite, Fe3C: First-principles calculations and experimental evidence

M. Nikolussi, S. L. Shang, T. Gressmann, A. Leineweber, E. J. Mittemeijer, Y. Wang, Z. K. Liu

Research output: Contribution to journalArticlepeer-review

69 Scopus citations

Abstract

First-principles results for the full set of elastic constants (stiffnesses) cij of cementite, Fe3C, revealed an extreme elastic anisotropy with a very small c44 amounting to only about 1/10 of c55 and c66. Synchrotron X-ray diffraction stress measurements were performed on Fe3C layers grown on α-Fe exhibiting a planar state of compressive residual stress. These data exhibit a characteristic hkl-dependence of the stress-induced reflection shifts, and provide experimental proof for the extreme elastic anisotropy of Fe3C.

Original languageEnglish (US)
Pages (from-to)814-817
Number of pages4
JournalScripta Materialia
Volume59
Issue number8
DOIs
StatePublished - Oct 1 2008

All Science Journal Classification (ASJC) codes

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

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