Article ID Journal Published Year Pages File Type
1579342 Materials Science and Engineering: A 2010 5 Pages PDF
Abstract

Pronounced grain refinement to ultrafine or nanoscale size in initially coarse-grained Co–25Fe and Co–35Fe alloys has been achieved upon conventional compression at room temperature. Both Co–Fe alloys exhibit a large plasticity of more than 140% without fracture at room temperature, which is related to a multiscale-grained microstructure resulting from deformation-induced grain refinement. The grains refine with increasing deformation during compression. The microstructure features indicate that the possible mechanism for the strain-induced grain refinement under conventional compression is a consequence of the propagation and coalescence of dislocation cell structures with strain accumulation.

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