Phase structure of ZK60-1Er magnesium alloy compressed at 450℃

摘要

The phase structure of ZK60-1Er magnesium alloy thermally compressed at the temperature of 450℃ and the strain rate of 1×10 -4 s -1 was determined by transmission electron microscopy（TEM）and high-resolution electron microscopy（HREM）.The results show that this magnesium alloy contains many new W phases（Mg3Zn3Er2,FCC structure）in the matrix.Those new W phases have two morphologies,either irregularly rectangular or rod morphology·Lattice constants of the two new W phases are slightly higher than those of W Phase（Mg3Zn3Y2）containing rare earth element of yttrium.