Microstructure and Properties of LPSO Phase Reinforced Mg Alloy Produced by Rheocasting

Shu Lin Lü; Xiong Yang; Shu Sen Wu; Xiao Gang Fang; Jing Wang

doi:10.4028/www.scientific.net/SSP.256.186

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Microstructure and Properties of LPSO Phase Reinforced Mg Alloy Produced by Rheocasting
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Microstructure and Properties of LPSO Phase Reinforced Mg Alloy Produced by Rheocasting

Abstract:

The long period stacking ordered (LPSO) phase reinforced Mg alloys have received many researches in recent years because of their excellent mechanical properties. However, the LPSO phase usually concentrates at the grain boundaries with a coarse network structure, which seriously deteriorates its strengthening effect. In this research, rheocasting and ultrasonic vibration (USV) process were firstly used to refine the LPSO phase in Mg alloy. The semisolid slurry of Mg96.9Y2Zn1Zr0.1 (at.%) alloy was prepared by USV and then formed by rheo-squeeze casting (RSC). The effects of USV and squeeze pressure on the microstructure and mechanical properties of this Mg alloy were investigated. The results show that the primary α-Mg and coarse LPSO phases were refined obviously by USV and RSC. The tensile strength and elongation of the RSC Mg96.9Y2Zn1Zr0.1 alloy were 232 MPa and 17.7% respectively, which were increased by 17.8% and 172.3% respectively compared to the conventional liquid casting alloy. The refinement mechanism of the LPSO phase in semisolid Mg alloy is also discussed.

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Solid State Phenomena (Volume 256)

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186-191

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https://doi.org/10.4028/www.scientific.net/SSP.256.186

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Online since:

September 2016

Authors:

Shu Lin Lü, Xiong Yang, Shu Sen Wu*, Xiao Gang Fang, Jing Wang

Keywords:

LPSO Phase, Mg-Y-Zn Alloy, Rheocasting, Squeeze Pressure, Ultrasonic Vibration

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References

[1] Y. Kawamura, K. Hayashi, A. Inoue, et al. Rapidly solidified powder metallurgy Mg97Zn1Y2 alloys with excellent tensile yield strength above 600 MPa, Mater. Trans. 42 (2001) 1171-1174.

DOI: 10.2320/matertrans.42.1172

Google Scholar

[2] S. Cabeza, G. Garcés, P. Pérez, et al. Microstructure and mechanical behavior of powder metallurgy Mg98. 5Gd1Zn0. 5 Alloy, Metall. Mater. Trans. A 45(2014) 3222-3231.

DOI: 10.1007/s11661-013-2041-z

Google Scholar

[3] G. Garcés, M. Maeso, I. Todd, et al. Deformation behaviour in rapidly solidified Mg97Y2Zn1 (at. %) alloy, J. Alloys and Compd. 432(2007) L10-L14.

DOI: 10.1016/j.jallcom.2006.06.009

Google Scholar

[4] T. Itoi, T. Seimiya, Y. Kawamura, et al. Long period stacking structures observed in Mg97Zn1Y2 alloy, Scripta Mater. 51 (2004) 101-111.

DOI: 10.1016/j.scriptamat.2004.04.003

Google Scholar

[5] S. Zhang, W. Liu, X. Gu, et al. Effect of solid solution and aging treatments on the microstructures evolutionand mechanical properties of Mg-14Gd-3Y-1. 8Zn-0. 5Zr alloy, J. Alloys Compd. 557(2013) 91-97.

DOI: 10.1016/j.jallcom.2012.12.093

Google Scholar

[6] M. Ishida, S. Yoshioka, T. Yamamoto, et al. Multi-scale 3D characterization of long period stacking ordered structure in Mg-Zn-Gd cast alloys, Microscopy, 63(2014) 25-26.

DOI: 10.1093/jmicro/dfu068

Google Scholar

[7] C. Lin, S.S. Wu, S.L. Lü, P. An, L. Wan, Microstructure and mechanical properties of rheo-diecast hypereutectic Al-Si alloy with 2%Fe assisted with ultrasonic vibration process, J. Alloy Compd. 568(2013)42-48.

DOI: 10.1016/j.jallcom.2013.03.089

Google Scholar

[8] V. Abramov, O. Abramov, V. Bulgakov, F. Sommer, Solidification of aluminum alloys under ultrasonic irradiation using water-cooled resonator, Mater. Lett. 37(1998) 27-34.

DOI: 10.1016/s0167-577x(98)00064-0

Google Scholar

[9] S. Lü, S. Wu, L. Wan, et al. Microstructure and tensile properties of wrought Al alloy 5052 produced by rheo-squeeze casting, Metall. Mater. Trans. A 44(2013) 2735-2745.

DOI: 10.1007/s11661-013-1637-7

Google Scholar

[10] S. Lü, S. Wu, W. Dai, et al. The indirect ultrasonic vibration process for rheo-squeeze casting of A356 aluminum alloy, J. Mater. Proc. Technol. 212(2012)1281-1287.

DOI: 10.1016/j.jmatprotec.2012.01.018

Google Scholar

[11] S. Wu, J. Zhao, L Zhang, et al. Development of non-dendritic microstructure of aluminum alloy in semi-solid state under ultrasonic vibration, Solid State Phenom. 141/143(2008)451-456.

DOI: 10.4028/www.scientific.net/ssp.141-143.451

Google Scholar

[12] G. Zhong, S. Wu, P. An. Effects of ultrasonic vibration on the iron-containing intermetallic compounds of high silicon aluminum alloy with 2%Fe, J. Alloys Compd. 492(2010)482-487.

DOI: 10.1016/j.jallcom.2009.11.145

Google Scholar