Mechanical strength of nanocrystalline/amorphous Al90Fe5Gd5 composites produced by rolling

Jiang, W. H.; Atzmon, M.
April 2005
Applied Physics Letters;4/11/2005, Vol. 86 Issue 15, p151916
Academic Journal
Mechanical deformation is expected to be an alternative route for synthesizing nanocrystalline/amorphous matrix composites. However, it is found that nanocrystalline/amorphous Al90Fe5Gd5 composites produced by cold rolling have lower hardness than the as-spun, fully amorphous, alloy. Much smaller pileups are observed around indents in rolled samples than in the as-spun sample. Combining high-resolution transmission electron microscopy with Fourier transform and image filtering, many nanovoids are observed in the shear bands near the boundary with the undeformed matrix.


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