Fig. 3

Optical micrographs of grain structures for (a) AZ31 alloy, (b) HC-1, (c) HC-2, and (d) HC-3, along with (e) grain size comparison of the composites.

Optical micrographs of grain structures for (a) AZ31 alloy, (b) HC-1, (c) HC-2, and (d) HC-3, along with (e) grain size comparison of the composites.