DEFORMATION-BEHAVIOR OF A RAPIDLY SOLIDIFIED FINE-GRAINED AL-8.5-PERCENT-FE-1.2-PERCENT-V-1.7-PERCENT-SI ALLOY

Deformation characteristics of a rapidly solidified dispersion strengt hened Al-8.5% Fe-1.2% V-1.7% Si alloy processed by planar dow casting was studied by tension testing at 25-420 degrees C, compression testin g at 25 degrees C and hardness tests. The as-processed alloy shows non -linear elastic behavior, yield drop,low uniform and total elongation, serrated yielding, stress relaxation, flow softening and anomalous st rain rate dependence of ductility. The results indicate that greater d ynamic recovery due to fine grains (<0.3 mu m) and essentially pure al uminum matrix in the as-processed planar flow cast alloy contribute to the observed deformation characteristics. Corroborative evidence for the recovery processes was obtained by differential scanning calorimet ry and hardness measurements of cold rolled and annealed samples.