Evolution of microstructure and hardness in an AZ80 magnesium alloy processed by high-pressure torsion

The Fabrication of Micro-Array Channels with the Ultrafine-Grained LZ91 Mg-Li Alloy by Micro-Embossing

“…Meanwhile, the microstructure of Mg-Li alloy after 10 turns of HPT processing becomes homogeneous, and the selected area electron diffraction (SAED) patterns in the illustration of Figure 5 b indicate that the grain boundaries have high angles of misorientation. Result at present is in line with earlier research that described that an Mg-8%Li alloy with a grain size of ~500 nm after HPT through 5 turns at ambient temperature [ 21 ] and an AZ80 alloy with an average grain sizes of ~200 nm after HPT through ten turns at ambient temperature [ 22 ].…”

Evaluating the textural and mechanical properties of an Mg-Dy alloy processed by high-pressure torsion

“…A similar microhardness evolution was reported for pure Mg processed by HPT at room temperature [17,54]. However, this type of evolution is not consistent with equation 3where the microhardness is expected to increase with increasing radial distance from the centre of the disc [14,22,40,43,46,53].…”

“…%) [39] and AZ31 [14] alloys processed at room temperature for up to 5 turns. The grain refinement estimated by transmission electron microscopy was in the range of ~200-300 nm after HPT processing of an AZ80 alloy [40] and an Mg-22Gd (wt. %) alloy [26], respectively.…”

Microstructure and Hardness Evolution in Magnesium Processed by HPT

“…Many papers have reported the formation of ultrafine grained structures in pure magnesium [3][4][5][6] and AZ31 [7][8][9][10][11] , AZ61 12 , AZ80 13 , AZ91 [14][15][16] , ZK60 [17][18][19] , Mg-Zn-Y 20,21 , Mg-Gd-Y-Zr 22,23 , Mg-Zn-Ca [24][25][26][27] and Mg-Dy-Al-Zn-Zr 28 alloys. The processed alloys exhibit improved strength but also some papers report superplastic behaviour 16,19,22,29,30 , improved hydrogen storage properties 3,[31][32][33][34][35] and improved corrosion resistance 24,27,36 .…”