Bulk Mg Produced by Back Pressure Equal Channel Angular Consolidation (BP- ECAC)
Bulk magnesium was consolidated from pure Mg particles with an average size of ~59 µm by back pressure equal channel angular pressing. The Mg powder was processed at 200°C for 4 and 8 passes, respectively, using route C. The consolidated materials displayed density of 1.78 g/cm3, compared to the theoretical value of 1.74 g/cm3 for pure Mg. Vickers microhardness (HV) values were measured to be about 54. Compressive tests at room temperature revealed yield strengths of 100-110 MPa and ultimate strengths of up to 142 MPa with strains to fracture of ~9%, comparable to those for extruded pure Mg. Microstructures were examined using optical microscopy (OM), scanning electron microscopy (SEM), and transmission electron microscopy (TEM).
Yuri Estrin and Hans Jürgen Maier
X. L. Wu et al., "Bulk Mg Produced by Back Pressure Equal Channel Angular Consolidation (BP- ECAC)", Materials Science Forum, Vols. 584-586, pp. 114-118, 2008