Abstract Scope |
Significant progress has been made in the past 20 years on wrought Mg alloys at fundamental and technological levels. At the fundamental level, textures formed in sheets and extrusions of different alloy compositions and produced under different strain paths or thermomechanical processing conditions are relatively well established, with the assistance of advanced characterisation techniques such as electron backscatter diffraction. At the technological level, room temperature formability of sheet has been improved, and tension-compression yield asymmetry of extrusion is also remarkably reduced. This presentation starts with some questions on dislocation dissociation, stacking faults, solute segregation, texture, and room temperature deformation behaviour of pure Mg and Mg alloys. With these questions, texture, grain size and deformation of sheets and extrusions produced under different processing conditions will be systematically examined and compared. Remaining and emerging scientific issues are then highlighted and discussed in the context of texture and grain size. |