J. Mater. Sci. Technol. ›› 2018, Vol. 34 ›› Issue (2): 277-283.DOI: 10.1016/j.jmst.2017.11.022
Special Issue: 2017-2018年Mg合金专题; High Strength Alloys-2018
• Orginal Article • Previous Articles Next Articles
Hansi Jianga, Xiaoguang Qiaoa, Chao Xub, Shigeharu Kamadob, Kun Wua, Mingyi Zhenga()
Received:
2017-08-05
Revised:
2017-08-18
Accepted:
2017-11-03
Online:
2018-02-10
Published:
2018-02-10
Hansi Jiang, Xiaoguang Qiao, Chao Xu, Shigeharu Kamado, Kun Wu, Mingyi Zheng. Influence of size and distribution of W phase on strength and ductility of high strength Mg-5.1Zn-3.2Y-0.4Zr-0.4Ca alloy processed by indirect extrusion[J]. J. Mater. Sci. Technol., 2018, 34(2): 277-283.
Fig. 1. XRD pattern (a), SEM images at low (b) and high (c) magnification of as-cast Mg-5.1Zn-3.2Y-0.4Zr-0.4Ca alloy and (d) TEM image of lamellar eutectic structure inserted with SAED pattern taken from area indicated by the arrow.
Fig. 6. Microstructures of the precipitates in as-extruded Mg-5.1Zn-3.2Y-0.4Zr-0.4Ca alloy at 350 °C: (a) HAADF image showing distribution of precipitates; (b) HRTEM image of large precipitates; (c) HRTEM image of small precipitates (d: crystal plane spacing).
Fig. 7. Microstructures of the precipitates in as-extruded Mg-5.1Zn-3.2Y-0.4Zr-0.4Ca alloy at 400 °C: (a) HAADF image showing distribution of precipitates; (b) HRTEM image of large precipitates; (c) HRTEM image of small precipitates.
Alloy (wt%) | Extrusion temperature | σ0.2 | σb | ε (%) |
---|---|---|---|---|
(MPa) | (MPa) | |||
Mg-5.1Zn-3.2Y-0.4Zr-0.4Ca | 350 °C | 373 | 403 | 5.1 |
400 °C | 332 | 352 | 12 | |
Mg-5.55Zn-1.72Y-0.37Zr [ | 400 °C | 282 | 336 | 10 |
Mg-5.49Zn-3.08Y-0.82Zr [ | 390 °C | 185 | 324 | 13 |
Mg-6Zn-4Y [ | 300 °C | 350 | 371 | 7 |
Mg-10.3Zn-6.4Y-0.4Zr-0.5Ca [ | 350 °C | 447 | 466 | 4.7 |
Table 1 Comparison of tensile properties of Mg-Zn-Y alloys.
Alloy (wt%) | Extrusion temperature | σ0.2 | σb | ε (%) |
---|---|---|---|---|
(MPa) | (MPa) | |||
Mg-5.1Zn-3.2Y-0.4Zr-0.4Ca | 350 °C | 373 | 403 | 5.1 |
400 °C | 332 | 352 | 12 | |
Mg-5.55Zn-1.72Y-0.37Zr [ | 400 °C | 282 | 336 | 10 |
Mg-5.49Zn-3.08Y-0.82Zr [ | 390 °C | 185 | 324 | 13 |
Mg-6Zn-4Y [ | 300 °C | 350 | 371 | 7 |
Mg-10.3Zn-6.4Y-0.4Zr-0.5Ca [ | 350 °C | 447 | 466 | 4.7 |
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