Kinetic process of mechanical alloying in Fe50Cu50

Article

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

DOI  :  10.1103/PhysRevB.58.R11817

来源: SCIE

【 摘 要 】

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].

【 授权许可】

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