Elsevier

Materials Letters

Volume 27, Issue 3, June 1996, Pages 101-105
Materials Letters

Hardening behavior of amorphous alloy Al90RE5Ni5 dispersion by nanoscale α-Al during crystallization

https://doi.org/10.1016/0167-577X(95)00264-2Get rights and content

Abstract

The crystallization process of amorphous alloy Al90RE5Ni5 can be written as: Am Al90RE5Ni5 — nano α-Al + Am AlRENi — α-Al + Al3Ni + Al11RE3. The structure of the Al-based amorphous alloy was explained by an atomic cluster model. The growth of nanoscale α-Al in an amorphous matrix was reported. The hardening process can undergo two stages. One is controlled by a shear deformation mechanism of the amorphous matrix. Another is decided by the dislocations in the nanoscale α-Al grain. The microhardness of the amorphous alloy dispersion by nanoscale α-Al depends strongly on the average grain sizes D and the spacing δ between the grains in an amorphous matrix.

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