Evaluation of tensile behavior of find-grained AZ61 alloy tube processed by severe plastic deformation

Magnesium and its alloys with severe plastic deformation (SPD) techniques are more attractive as structural parts in many industrial applications because of their advantages. Parallel Tubular Channel Angular Pressing (PTCAP) is a recently developed novel intense plastic deformation method appropriate for fabrication of ultrafine-grained and nano-structured cylindrical tubes. In this study, this technique was applied to AZ61 magnesium alloy for one pass at 350° C and the effects on the grain size and mechanical properties were studied. This results showed that the specimen processed by PTCAP exhibits better elongation of about 23 %. Furthermore, the maximum tensile strength is found for one-pass PTCAPed specimen. In addition, after one pass, the grain size decreased to 9.52 µm which shows a great refinement of structure.