ABSTRACT
M g - A l , M g - Z n and M g - C a alloys. This fact correlates with the lower strength properties
Table 33. Microhardness of phases (HV) in M g alloys at various temperatures [338-340].*
Phase Temperature, °C
20 150 200 250 300 350
Compounds:
M g 1 7 A l 1 2 183 168 158 125 84 - MgZn 271 234 193 157 97 - M g 2 C a 156 139 131 91 47 - M g 1 2 C e 168 152 147 134 125 - M g 1 2 N d 186 169 165 139 104 - M g 5 T h 256 258 228 222 196 - M g 2 4 Y 5 218 214 201 196 173 132
M g 4 1 S m 5 232 217 188 164 132 698
M g 2 4 D y 5 223 216 178 146 114 90
Solid solutions in:
M g - 4 % T h 42.6 48.7 37.6 38.8 23.1 - M g - l % C e 43.6 38.3 30.6 21.8 21.2 - M g - 1 0 % A l 55.0 58.4 41.4 37.6 31.2 -
^Comments: In the original article [338] for the compounds in the systems M g - C e and M g - N d the formulas Mg 9 Ce and M g x N d v were written. In the original article [340] for the compound in the M g - S m system the formula M g 6 2 S m was written.
