Kinetic process of mechanical alloying in Fe50Cu50

J.Y. Huang, Jianzhong Jiang, H. Yasuda, H. Mori

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Abstract

It is shown that mechanical alloying in the immiscible Fe-Cu system is governed by the atomic shear event and shear-induced diffusion process. We found that an alpha-to-gamma phase transformation, as evidenced by the Nishiyama-Wasserman orientation relationship, occurs by simultaneous shearing process when the grain size reduces to about 20 nm and Cu content reaches 20 at. % in bcc-FerichCu grains in the intermediate stage of milling of Fe50Cu50. Further milling promotes the interdiffusion between fcc-FerichCu and fcc-FeCurich, which is favored because of the similarity of the lattice structures, until a complete fee Fe-Cu solid solution is formed. The results provide significant insight into the understanding of recent experiments showing that chemical mixing of immiscible elements can bd induced by mechanical alloying. [S0163-1829(98)51342-2].
Original languageEnglish
JournalPhysical Review B Condensed Matter
Volume58
Issue number18
Pages (from-to)11817-11820
ISSN0163-1829
DOIs
Publication statusPublished - 1998

Bibliographical note

Copyright (1998) by the American Physical Society.

Keywords

  • PHASE-TRANSFORMATIONS
  • MAGNETIC-PROPERTIES
  • IMMISCIBLE ELEMENTS
  • PLASTIC-DEFORMATION
  • SYSTEM
  • THERMAL-DECOMPOSITION
  • FE-CU ALLOYS
  • SOLID-SOLUTIONS
  • GRAIN-SIZE CHANGES
  • ABSORPTION FINE-STRUCTURE

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