Acta Metallurgica Sinica (English Letters) ›› 2019, Vol. 32 ›› Issue (5): 550-558.DOI: 10.1007/s40195-018-0826-1
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Pei-Lin Zhang1, Yu-Hong Zhao1(), Ruo-Peng Lu1, Zhi-Bing Ding1, Hua Hou1
Received:
2018-07-02
Revised:
2018-08-19
Online:
2019-05-10
Published:
2019-05-27
Pei-Lin Zhang, Yu-Hong Zhao, Ruo-Peng Lu, Zhi-Bing Ding, Hua Hou. Microalloying Effect of Sn on Phase Transformation During Heat Treatment in Mg-Y-Zn-Zr Alloys[J]. Acta Metallurgica Sinica (English Letters), 2019, 32(5): 550-558.
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Alloy | Composition (wt%) |
---|---|
A | Mg-4.6Y-2.5Zn-0.6Zr |
B | Mg-4.6Y-2.5Zn-0.6Zr-0.2Sn |
C | Mg-4.6Y-2.5Zn-0.6Zr-0.5Sn |
Table 1 Chemical compositions of studied alloys
Alloy | Composition (wt%) |
---|---|
A | Mg-4.6Y-2.5Zn-0.6Zr |
B | Mg-4.6Y-2.5Zn-0.6Zr-0.2Sn |
C | Mg-4.6Y-2.5Zn-0.6Zr-0.5Sn |
Fig. 1 Optical microstructures of a-c as-cast and d-f solid solution treated a, d Mg-4.6Y-2.5Zn-0.6Zr, b, e Mg-4.6Y-2.5Zn-0.6Zr-0.2Sn, c, f Mg-4.6Y-2.5Zn-0.6Zr-0.5Sn alloys
Fig. 4 SEM micrographs of a-c as-cast and d-f solid solution treated a, d Mg-4.6Y-2.5Zn-0.6Zr, b, e Mg-4.6Y-2.5Zn-0.6Zr-0.2Sn, c, f Mg-4.6Y-2.5Zn-0.6Zr-0.5Sn alloys
Location (point) | Mg | Y | Zn | Zr | Sn |
---|---|---|---|---|---|
87.99 | 4.31 | 7.30 | 0.41 | - | |
91.34 | 4.01 | 4.27 | 0.39 | - | |
92.88 | 3.20 | 3.49 | 0.38 | 0.08 | |
84.45 | 5.34 | 9.79 | 0.34 | 0.08 | |
93.95 | 2.78 | 2.86 | 0.32 | 0.09 | |
91.92 | 3.27 | 4.25 | 0.43 | 0.14 | |
47.95 | 28.62 | 1.78 | 3.26 | 18.39 | |
90.72 | 4.43 | 4.49 | 0.36 | - | |
83.35 | 14.14 | 1.53 | 0.80 | 0.19 | |
79.28 | 6.94 | 13.15 | 0.48 | 0.16 | |
92.63 | 3.24 | 3.77 | 0.25 | 0.11 | |
91.88 | 3.34 | 4.43 | 0.39 | 0.06 | |
60.23 | 14.04 | 5.00 | 9.45 | 11.48 |
Table 2 EDS analysis (at.%) of typical positions in Fig. 4
Location (point) | Mg | Y | Zn | Zr | Sn |
---|---|---|---|---|---|
87.99 | 4.31 | 7.30 | 0.41 | - | |
91.34 | 4.01 | 4.27 | 0.39 | - | |
92.88 | 3.20 | 3.49 | 0.38 | 0.08 | |
84.45 | 5.34 | 9.79 | 0.34 | 0.08 | |
93.95 | 2.78 | 2.86 | 0.32 | 0.09 | |
91.92 | 3.27 | 4.25 | 0.43 | 0.14 | |
47.95 | 28.62 | 1.78 | 3.26 | 18.39 | |
90.72 | 4.43 | 4.49 | 0.36 | - | |
83.35 | 14.14 | 1.53 | 0.80 | 0.19 | |
79.28 | 6.94 | 13.15 | 0.48 | 0.16 | |
92.63 | 3.24 | 3.77 | 0.25 | 0.11 | |
91.88 | 3.34 | 4.43 | 0.39 | 0.06 | |
60.23 | 14.04 | 5.00 | 9.45 | 11.48 |
State | Alloy | YS (MPa) | UTS (MPa) | Elongation (%) |
---|---|---|---|---|
As cast | A | 107 | 197 | 12.9 |
B | 124 | 231 | 11.1 | |
C | 123 | 206 | 8.6 | |
As solution treated | A | 130 | 237 | 13.9 |
B | 125 | 230 | 13.4 | |
C | 126 | 221 | 10.7 |
Table 3 Tensile properties of Mg-4.6Y-2.5Zn-0.6Zr-xSn alloys in different states tested at room temperature
State | Alloy | YS (MPa) | UTS (MPa) | Elongation (%) |
---|---|---|---|---|
As cast | A | 107 | 197 | 12.9 |
B | 124 | 231 | 11.1 | |
C | 123 | 206 | 8.6 | |
As solution treated | A | 130 | 237 | 13.9 |
B | 125 | 230 | 13.4 | |
C | 126 | 221 | 10.7 |
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