By means of tensile testing machine

metalloscope and equal channel angular extrusion（ECAE） testing

preparation of Mg-Al magnesium alloy semi-solid billets and its thixo-extrusion forming were investigated.The results show that desirable strain induced effects can be obtained by ECAE.After Mg-Al magnesium alloy was processed by ECAE

mechanical properties was increased with the refinement of grain size.Semi-solid billets prepared by new SIMA were characterized by fine grains

desirable spheroidization and homogeneous microstructure.In contrast

semi-solid billets prepared by direct isothermal treatment were characterized by coarse grain and terrible spheroidization.High mechanical properties and fine grains occur in angle frame components manufacture by thixo-extruding new SIMA prepared Mg-Al series semi-solid billets including AZ61

AZ80

AZ91D and AM60.Tensile strengthes of angle frame components reach 306.8

308.3

299.8 and 321.6MPa

respectively

and elongations are 21.6%

28.4%

14.6% and 29.6%

respectively.