Effects of Nd on microstructure and mechanical properties of as-cast Mg–12Gd–2Zn–<i>x</i>Nd–0.4Zr alloys with stacking faults

Lixin Hong; Rongxiang Wang; Xiaobo Zhang

doi:10.1007/s12613-021-2264-8

Volume 29 Issue 8

Aug. 2022

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Article Navigation > International Journal of Minerals, Metallurgy and Materials > 2022 > 29(8): 1570-1577

Lixin Hong, Rongxiang Wang, and Xiaobo Zhang, Effects of Nd on microstructure and mechanical properties of as-cast Mg–12Gd–2Zn–xNd–0.4Zr alloys with stacking faults, Int. J. Miner. Metall. Mater., 29(2022), No. 8, pp. 1570-1577. https://doi.org/10.1007/s12613-021-2264-8

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Lixin Hong, Rongxiang Wang, and Xiaobo Zhang, Effects of Nd on microstructure and mechanical properties of as-cast Mg–12Gd–2Zn–xNd–0.4Zr alloys with stacking faults, Int. J. Miner. Metall. Mater., 29(2022), No. 8, pp. 1570-1577. https://doi.org/10.1007/s12613-021-2264-8

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Research Article

Effects of Nd on microstructure and mechanical properties of as-cast Mg–12Gd–2Zn–xNd–0.4Zr alloys with stacking faults

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Corresponding author:
Xiaobo Zhang E-mail: xbxbzhang2003@163.com
Received: 24 November 2020; Revised: 11 January 2021; Accepted: 29 January 2021; Available online: 2 February 2021

Abstract

Abstract

In order to study the effects of Nd addition on microstructure and mechanical properties of Mg–Gd–Zn–Zr alloys, the microstructure and mechanical properties of the as-cast Mg–12Gd–2Zn–xNd–0.4Zr (x = 0, 0.5wt%, and 1wt%) alloys were investigated by using optical microscope, scanning electron microscope, X-ray diffractometer, nano indentation tester, microhardness tester, and tensile testing machine. The results show that the microstructures mainly consist of α-Mg matrix, eutectic phase, and stacking faults. The addition of Nd plays a significant role in grain refinement and uniform microstructure. The tensile yield strength and microhardness increase but the compression yield strength decreases with increasing Nd addition, leading to weakening tension–compression yield asymmetry in reverse of the Mg–12Gd–2Zn–xNd–0.4Zr alloys. The highest ultimate tensile strength (194 MPa) and ultimate compression strength (397 MPa) are obtained with 1wt% Nd addition of the alloy.
- magnesium alloy;
- neodymium;
- microstructure;
- stacking fault;
- mechanical properties

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