Effect of Extrusion Conditions on Microstructure and Texture of Mg-1 Mn and Mg-1 Mn-1.6 Sr Alloys

摘要

Mg-1% Mn (M1) and Mg-1% Mn-1.6% Sr alloys have beensubjected to hot extrusion and the effect of extrusion conditionson the microstructure and texture has been investigated. Additionof Sr to M1 alloy refines the extruded microstructure. Twodifferent ram speeds of 4 mm/s and 8 mm/s and two differenttemperatures of 300°C and 350°C have been used in the study.The extent of recrystallization increases with increasing ramspeed. The texture of extruded M1 weakens with Sr addition. Themechanism of texture weakening is suggested to be PSN withformation of new grains having orientations different than that ofparent grains.