Effect of Solution Treatment on Microstructures and Hardness of Mg-Gd-Y-Zr Alloy

Abstract:

The influence of the solution treatment (at the temperature of 500-520°C for 4-12 h) on microstructures and mechanical properties of Mg-Gd-Y-Zr alloy was investigated by means of optical microscopy, scanning electron microscopy (SEM), X-ray diffraction (XRD) and Vickers hardness measurement. The as-cast alloy contains a microstructure consisting of α-Mg matrix, Mg₅Gd phase and Mg₂₄Y₅ phase. With increasing solution temperature and time, the quantity of the primary particles (Mg₅Gd and Mg₂₄Y₅) in the alloy continually decreased, and the degree of recrystallization gradually increased, which result in the gradual decrease of the Vickers hardness of the solution-treated alloys.

• Periodical: Advanced Materials Research (Volume 937)
• Pages: 182-186
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.937.182
• Online since: May 2014
• Authors: Quan An Li*, Lei Lei Chen, Wen Chuang Liu, Xing Yuan Zhang, Hui Zhen Jiang
• Keywords: Mg-Gd-Y-Zr Alloy, Microstructure, Solution Treatment, Vickers Hardness

References

[1] Zhenyan Zhang, Liming Peng, Xiaoqin Zeng, Penghuai Fu and Wenjiang Ding, Characterization of phases in a Mg-6Gd-4Sm-0. 4Zr (wt. %) alloy during solution treatment, Materials Characterization, (60) 2009 555-559.

DOI: 10.1016/j.matchar.2009.01.002

[2] Aghion E, Bronfin B, Eliezer D, The role of the magnesium industry in protecting the environment, Journal of Materials Processing Technology. (117) 2001 381-385.

DOI: 10.1016/s0924-0136(01)00779-8

[3] Zhanhui Wang, Wenbo Du, Xudong Wang, Ke Liu and Shubo Li, Microstructure evolution of Mg−9Gd−2Er−0. 4Zr alloy during solid solution treatment, Transactions of Nonferrous Metals Society of China. (23) 2013 593-598.

DOI: 10.1016/s1003-6326(13)62504-2

[4] Bayani, Hossein, Effect of rare earth elements addition on thermal fatigue behaviors of AZ91 magnesium alloy, Journal of Rare Earths. (27) 2009 255-258.

DOI: 10.1016/s1002-0721(08)60230-6

[5] Jilin Li, Rongshi Chen, Wei Ke, Microstructure and mechanical properties of Mg−Gd−Y−Zr alloy cast by metal mould and lost foam casting, Transactions of Nonferrous Metals Society of China. (21) 2011 761−766.

DOI: 10.1016/s1003-6326(11)60777-2

[6] Mingbo Yang, Caiyuan Qin, Fusheng Pan and Tao Zhou, Comparison of effects of cerium, yttrium and gadolinium additions on as-cast microstructure and mechanical properties of Mg−3Sn−1Mn magnesium alloy, J Rare Earth. (29) 2011 550−557.

DOI: 10.1016/s1002-0721(10)60496-6

[7] Yan Gao, Qudong Wang, Jinhai Gu, Yang Zhao and Yan Tong, Behavior of Mg–15Gd–5Y–0. 5Zr alloy during solution heat treatment from 500 to 540 °C, Materials Science and Engineering A. (459) 2007 117-123.

DOI: 10.1016/j.msea.2007.01.057

[8] Jie Wang, Yuansheng Yang and Wen-hui Tong, Effect of purification treatment on corrosion resistance of Mg−Gd−Y−Zr alloy, Transactions of Nonferrous Metals Society of China. (21) 2011 949−954.

DOI: 10.1016/s1003-6326(11)60806-6

[9] L.L. Rokhlin, Advance Light Alloys and Composites, in: Proceedings of NATO Advanced Study Institute, Kluwer, 1998, p.443.

[10] S.M. He, X.Q. Zeng, L.M. Peng, X. Gao, J.F. Nie and W.J. Ding, Microstructure and strengthening mechanism of high strength Mg-10Gd-2Y-0. 5Zr alloy, Journal of Alloys and Compounds. (427) 2007 316-323.

DOI: 10.1016/j.jallcom.2006.03.015

[11] L.M. Peng, S.M. He, J.F. Nie, X. Gao, X.Q. Zeng and W.J. Ding, in: B.S. You (Ed. ), Proceeding of the 1st Asian Symposium on Magnesium Alloys, Jeju, Korea, 2005, p.55–60.

[12] S.M. He, X.Q. Zeng, L.M. Peng, X. Gao, J.F. Nie and W.J. Ding, Precipitation in a Mg-10Gd-3Y -0. 4Zr (wt. %) alloy during isothermal ageing at 250°C, Journal of Alloys and Compounds . (421) 2006 309-313.

DOI: 10.1016/j.jallcom.2005.11.046