Microstructure and Tensile Properties of the Mg-6Zn-4Al-<i>x</i>Sn Die Cast Magnesium Alloy
The effect of various Sn contents (1⁻2 wt. %) on the microstructure, age hardening response, and tensile and casting properties of the high-pressure die cast Mg-6Zn-4Al alloy were studied. All as-cast alloys consisted of α-Mg and icosahedral quasi-crystalline phase; and the additi...
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MDPI AG
2019-01-01
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| Series: | Metals |
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| Online Access: | https://www.mdpi.com/2075-4701/9/2/113 |
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doaj-b64c1a35dd64414d848487678ddc8cd82020-11-24T21:59:53ZengMDPI AGMetals2075-47012019-01-019211310.3390/met9020113met9020113Microstructure and Tensile Properties of the Mg-6Zn-4Al-<i>x</i>Sn Die Cast Magnesium AlloyJin Zhou0Hamid Reza Jafari Nodooshan1Dejiang Li2Xiaoqin Zeng3Wenjiang Ding4National Engineering Research Center of Light Alloy Net Forming and Key State Laboratory of Metal Matrix Composite, Shanghai Jiao Tong University, Shanghai 200240, ChinaNational Engineering Research Center of Light Alloy Net Forming and Key State Laboratory of Metal Matrix Composite, Shanghai Jiao Tong University, Shanghai 200240, ChinaNational Engineering Research Center of Light Alloy Net Forming and Key State Laboratory of Metal Matrix Composite, Shanghai Jiao Tong University, Shanghai 200240, ChinaNational Engineering Research Center of Light Alloy Net Forming and Key State Laboratory of Metal Matrix Composite, Shanghai Jiao Tong University, Shanghai 200240, ChinaNational Engineering Research Center of Light Alloy Net Forming and Key State Laboratory of Metal Matrix Composite, Shanghai Jiao Tong University, Shanghai 200240, ChinaThe effect of various Sn contents (1⁻2 wt. %) on the microstructure, age hardening response, and tensile and casting properties of the high-pressure die cast Mg-6Zn-4Al alloy were studied. All as-cast alloys consisted of α-Mg and icosahedral quasi-crystalline phase; and the addition of 2% Sn caused the formation of Mg<sub>2</sub>Sn phases. Dendrite structure and eutectic phases were observably refined by Sn addition. The hot tearing susceptibility of the die cast Mg-6Zn-4Al alloy prominently decreased with increasing Sn addition. During T6 heat treatment, Sn addition did not obviously affect the time to reach peak hardness, but significantly enhanced the age hardening response and improved the strength of alloys under peak-aged conditions. Compared to single aging, double aging resulted in the higher density of finer β<sub>1</sub>′ and β<sub>2</sub>′ precipitates. The double aged Mg-6Zn-4Al-1Sn alloy offered the optimum tensile properties among all conditions. The yield strength, ultimate tensile strength, and elongation were 209 MPa, 305 MPa, and 4.3%, respectively.https://www.mdpi.com/2075-4701/9/2/113Mg-Zn-Al-SnT6 treatmentmicrostructuretensile propertieshigh pressure die casting |
| collection |
DOAJ |
| language |
English |
| format |
Article |
| sources |
DOAJ |
| author |
Jin Zhou Hamid Reza Jafari Nodooshan Dejiang Li Xiaoqin Zeng Wenjiang Ding |
| spellingShingle |
Jin Zhou Hamid Reza Jafari Nodooshan Dejiang Li Xiaoqin Zeng Wenjiang Ding Microstructure and Tensile Properties of the Mg-6Zn-4Al-<i>x</i>Sn Die Cast Magnesium Alloy Metals Mg-Zn-Al-Sn T6 treatment microstructure tensile properties high pressure die casting |
| author_facet |
Jin Zhou Hamid Reza Jafari Nodooshan Dejiang Li Xiaoqin Zeng Wenjiang Ding |
| author_sort |
Jin Zhou |
| title |
Microstructure and Tensile Properties of the Mg-6Zn-4Al-<i>x</i>Sn Die Cast Magnesium Alloy |
| title_short |
Microstructure and Tensile Properties of the Mg-6Zn-4Al-<i>x</i>Sn Die Cast Magnesium Alloy |
| title_full |
Microstructure and Tensile Properties of the Mg-6Zn-4Al-<i>x</i>Sn Die Cast Magnesium Alloy |
| title_fullStr |
Microstructure and Tensile Properties of the Mg-6Zn-4Al-<i>x</i>Sn Die Cast Magnesium Alloy |
| title_full_unstemmed |
Microstructure and Tensile Properties of the Mg-6Zn-4Al-<i>x</i>Sn Die Cast Magnesium Alloy |
| title_sort |
microstructure and tensile properties of the mg-6zn-4al-<i>x</i>sn die cast magnesium alloy |
| publisher |
MDPI AG |
| series |
Metals |
| issn |
2075-4701 |
| publishDate |
2019-01-01 |
| description |
The effect of various Sn contents (1⁻2 wt. %) on the microstructure, age hardening response, and tensile and casting properties of the high-pressure die cast Mg-6Zn-4Al alloy were studied. All as-cast alloys consisted of α-Mg and icosahedral quasi-crystalline phase; and the addition of 2% Sn caused the formation of Mg<sub>2</sub>Sn phases. Dendrite structure and eutectic phases were observably refined by Sn addition. The hot tearing susceptibility of the die cast Mg-6Zn-4Al alloy prominently decreased with increasing Sn addition. During T6 heat treatment, Sn addition did not obviously affect the time to reach peak hardness, but significantly enhanced the age hardening response and improved the strength of alloys under peak-aged conditions. Compared to single aging, double aging resulted in the higher density of finer β<sub>1</sub>′ and β<sub>2</sub>′ precipitates. The double aged Mg-6Zn-4Al-1Sn alloy offered the optimum tensile properties among all conditions. The yield strength, ultimate tensile strength, and elongation were 209 MPa, 305 MPa, and 4.3%, respectively. |
| topic |
Mg-Zn-Al-Sn T6 treatment microstructure tensile properties high pressure die casting |
| url |
https://www.mdpi.com/2075-4701/9/2/113 |
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