抄録
Extensive researches have been conducted on mechanical property and microstructure after severe plastic deformation (SPD) processes. The studies on mechanical properties were conducted, a general tendency that strength increases and elongation decreases as the applied strain increases. However the formability of materials after SPD processes was little studied. Therefore we investigated the formability of steels subjected to different cold forming processes. In this study, the workability of ECAEed carbon steesls was investigated and ductile fracture was studied by the formability test. Three kinds of work-piece were prepared by ECAE process, rolling and combined process, respectively. All processing were carried out under the condition of the room temperature. Experimental result was evaluated with cumulative equivalent strain. The difference of workability for each process was discussed by EBSP analysis.
