《Table 2 EDS results of as-cast alloys》

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《Effects of Y Content on the Microstructures and Mechanical Properties of Mg-5Zn-xY-0.6Zr Alloys》

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Fig.3 shows the SEM images and EDS analysis of as-cast Mg-5Zn-xY-0.6Zr alloys.It illustrates that the reticular intermetallics is made of Mg，Zn and Y in position B.Also the atomic ratio of Y and Zn is nearly 2:3，which is corresponding to the XRD result of W-Mg3Y2Zn3 phase shown in Fig.2.Therefore，the reticular intermetallics phase should be W-Mg3Y2Zn3.Similarly，EDS result of the gray flaked phase in position C is also shown in Table 2.The atomic ratio between Y and Zn is approximately 1:1，which is in accordance with X-Mg12YZn phase shown in Fig.2.Thus，with consideration of the EDS analyses，it can be concluded that WZ505 alloy consists ofα-Mg，W-Mg3Y2Zn3 and X-Mg12YZn phases.WZ805 alloy consists of a-Mg，X-Mg12YZn phase and minor W-Mg3Y2Zn3.Meanwhile，onlyα-Mg and X-Mg12YZn phase exist in WZ1105 alloy.These results are in good agreement with XRD patterns.