Magnetism-induced solid solution softening in NiAl with Co, Fe, Mn, and Cr solute atoms : Theory and experiment

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

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Author(s)

Detail(s)

Original languageEnglish
Pages (from-to)911-919
Journal / PublicationIntermetallics
Volume12
Issue number7-9 SPEC. ISS.
Publication statusPublished - Jul 2004
Externally publishedYes

Abstract

By taking the solid solution effect of Co, Fe, Mn, and Cr solutes in Ni-rich NiAl as an example, we have determined, through a combination of alloying behavior experiments, first-principles calculations, and neutron diffraction measurements, that magnetism has a profound impact on the mechanical properties of intermetallics. Co solutes do not affect the hardening behavior of NiAl alloys. Fe solutes, on the other hand, induce the most substantial and unusual solid solution softening among these solutes. These results can only be explained by the presence of magnetic interactions induced by solutes located on the Al sublattice. The predicted magnetic moment of Fe solutes was verified by neutron diffraction experiment. Our investigation points out the inadequacy of the conventionally used Goldschmidt radii in addressing the atomic size effect in intermetallics. © 2004 Elsevier Ltd. All rights reserved.

Research Area(s)

  • A. Nickel aluminides, based on NiAl, B. Solid-solution hardening, D. Site occupancy, E. Ab-initio calculations, F. Diffraction (electron, neutron and X-ray)

Citation Format(s)

Magnetism-induced solid solution softening in NiAl with Co, Fe, Mn, and Cr solute atoms : Theory and experiment. / Fu, C. L.; Liu, C. T.; Wang, Xun-Li; Krcmar, M.; Fernandez-Baca, J. A.

In: Intermetallics, Vol. 12, No. 7-9 SPEC. ISS., 07.2004, p. 911-919.

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