Microstructure and Mechanical Behavior of Mg-0.5Si-xSn Alloys

• Autorzy: Fu X. , Yang Y. , Ma Q. Y. , Peng X. , Xu T.

Identyfikatory

DOI

10.1515/afe-2017-0154

• Języki publikacji: EN

Abstrakty

EN

Mg-0.5Si-xSn (x=0.95, 2.9, 5.02wt.%) alloys were cast and extruded at 593K (320 ºC) with an extrusion ratio of 25. The microstructure and mechanical properties of as-cast and extruded test alloys were investigated by OM, SEM, XRD and tensile tests. The experimental results indicate that the microstructure of the Mg-0.5Si-xSn alloys consists of primary α-Mg dendrites and an interdendritic eutectic containing α-Mg, Mg₂Si and Mg₂Sn. There is no coarse primary Mg₂Si phase in the test alloys due to low Si content. With the increase in the Sn content, the Mg₂Si phase was refined. The shape of Mg₂Si phase was changed from branch to short bar, and the size of them were reduced. The ultimate tensile strength and yield strength of Mg-0.52Si-2.9Sn alloy at the temperature of 473K (200 ºC) reach 133MPa and 112MPa respectively. Refined eutectic Mg₂Si phase and dispersed Mg₂Sn phase with good elevated temperature stability are beneficial to improve the elevated temperature performance of the alloys. However, with the excess addition of Sn, large block-like Mg₂Sn appears around the grain boundary leading to lower mechanical properties.

Słowa kluczowe

EN

low silicon magnesium alloy; eutectic Mg2Si; microstructure behavior; mechanical behavior

PL

stop magnezu; stop Mg2Si; zachowanie mechaniczne

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2017
• Tom: Vol. 17, iss. 4
• Strony: 179--184
• Opis fizyczny: Bibliogr. 13 poz., rys., tab., wykr.

Twórcy

autor

Fu X.

• School of Materials Science and Engineering, Chongqing University, Chongqing 400044, China

autor

Yang Y.

• School of Materials Science and Engineering, Chongqing University, Chongqing 400044, China; National Engineering Research Center for Magnesium Alloys, Chongqing University, Chongqing 400044, China

autor

Ma Q. Y.

• School of Materials Science and Engineering, Chongqing University, Chongqing 400044, China

autor

Peng X.

• School of Materials Science and Engineering, Chongqing University, Chongqing 400044, China; National Engineering Research Center for Magnesium Alloys, Chongqing University, Chongqing 400044, China

autor

Xu T.

• School of Materials Science and Engineering, Chongqing University, Chongqing 400044, China

Bibliografia

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• [3] Chi, H., Sun, H. & Zhang, Q. (2014). Advanced thermo electrics governed by a single parabolic band: Mg-Si-Sn, a canonical example. Physical Chemistry Chemical Physics. 16(15), 6893-6897.
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• [7] Yu, X., Jiang, B. & Yang, H. (2015). High temperature oxidation behavior of Mg-Y-Sn, Mg-Y, Mg-Sn alloys and its effect on corrosion property. Applied Surface Science. 353, 1013-1022.
• [8] Nam, K.Y., Song, D.H. & Lee, C.W. (2006). Modification of Mg2Si Morphology in As-Cast Mg-Al-Si Alloys with Strontium and Antimony. Materials Science Forum. 238-241.
• [9] Liu, K., Du, W. & Li, S. (2016). The effect of heat treatment on microstructure of the melt-spun Mg–7Y–4Gd–5Zn–0.4Zr alloy. Journal of Magnesium & Alloys. 4(2), 99-103.
• [10] Nadella, R., Sahu, S.N. & Gokhale, A.A. (2013). Foaming characteristics of Al–Si–Mg (LM25) alloy prepared by liquid metal processing. Materials Science & Technology. 26(8), 908-913.
• [11] Dharmendra, C. & Rao, K.P. (2012). Hot working mechanisms and texture development in Mg-3Sn-2Ca-0.4Al alloy. Materials Chemistry & Physics. 136(2-3), 1081-1091.
• [12] Jiang, G., He, J. & Zhu, T. (2014). High performance Mg2(Si, Sn) solid solutions. Advanced Functional Materials. 24(24), 3776-3781.
• [13] Zhao, C., Pan, F. & Zhao, S. (2015). Microstructure, corrosion behavior and cytotoxicity of biodegradable Mg-Sn implant alloys prepared by sub-rapid solidification. Materials Science & Engineering C Materials for Biological Applications. 54, 245-251.

Uwagi

PL

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę (zadania 2017).