Temperature dependence of elastic parameters and internal frictions for MnCu20Ni5Fe2 alloy

Mikio Fukuhara, Fuxing Yin

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

Using ultrasonics, MnCu20Ni5Fe2 (M2052) alloy's acoustic characteristics were observed in order to understand its high damping properties. Longitudinal and shear wave velocities, eight kinds of elastic parameters, and dilational and shear internal frictions were simultaneously measured as functions of temperature in cooling and heating runs between 218 and 373 K in M2052 alloy. A valley in Young and shear moduli, Debye temperature and internal friction peaks at around 345 K showed a M2052 fcc/fct transformation, accompanied by volume-nonpreserving lattice softening. The increment of dilational friction in the low temperature can be interpreted as boundary effect of the misfit domain, associated with nonharmonity of potential between pairs of atoms. The M2052 alloy shows highest elasticity below 300 K, indicating large resistance for volume-preserving distortion.

Original languageEnglish
Pages (from-to)459-466
Number of pages8
JournalPhysica Status Solidi (A) Applied Research
Volume201
Issue number3
DOIs
Publication statusPublished - 2004 Feb

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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