Twinning and Softening of Cast Magnesium Alloy AZ91 under Hot Compression

Cast magnesium alloy AZ91 is studied after uniaxial compression in the range from room temperature to 400°C. The alloy is tested for compression and its microstructure is determined. The values of the parameter of strain hardening are found. The main mechanisms of structural transformations developing under compressive deformation of alloy AZ91 at low and moderate temperatures are considered.