Identification of a Ni0.5 (Al0.5-x Mnx) B2 phase at the heterophase interfaces of Cu-rich precipitates in an α-Fe matrix

R. Prakash Kolli*, Zugang Mao, David N. Seidman, Denis T. Keane

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

61 Scopus citations

Abstract

A phase with the stoichiometry Ni0.5 (Al0.5-x Mnx) is observed at heterophase interfaces of Cu-rich precipitates in an α-Fe matrix, utilizing atom-probe tomography. First-principles calculations are utilized to determine the substitutional energies, yielding EMn→Ni =0.916 eV atom-1 and EMn→Al =-0.016 eV atom-1 indicating that the manganese atoms prefer substituting at Al sublattice sites instead of Ni sites. A synchrotron radiation experiment demonstrates that the identified phase possesses the B2 structure.

Original languageEnglish (US)
Article number241903
JournalApplied Physics Letters
Volume91
Issue number24
DOIs
StatePublished - 2007

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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