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Strengthening Precipitate, Thermal Stability, and Mechanical Properties of Melt-Spun Mg-8Gd-3Nd Alloy

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Abstract

Ribbons of melt-spun Mg-8Gd-3Nd (wt.%) alloy with different circumferential velocities ranging from 20 to 40 m/s were prepared. The phase composition and transformation were studied using x-ray diffraction, differential scanning calorimetry, and transmission electron microscopy. The ribbon of 40 m/s exhibited two exothermic peaks in the temperature range from 600 to 850 K, which corresponded to some metastable phases. The first phase transformation at 673 K was related to β′-Mg12 (Gd, Nd) precipitate and the other exothermic peak at 833 K was associated with β-Mg5 (Gd, Nd) phase. The improvements of microhardness and tensile properties were ascribed to the coexistence of both β′-Mg12 (Gd, Nd) and β-Mg5 (Gd, Nd) precipitates. Meanwhile, the fine and homogenous β-Mg5 (Gd, Nd) precipitate played a more important role in enhancing mechanical properties compared to β′-Mg12 (Gd, Nd), owing to higher hardness and thermal stability.

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Acknowledgments

This research was financially supported by the National Natural Science Foundation of China (51001043), the Program for New Century Excellent Talents in University, the China Postdoctoral Science Special Foundation (201104390), the Science Foundation for the Excellent Youth Scholars of Hebei Province (Y2012019), the Program for Innovative Research Team (in Science and Technology) in the University of Henan Province (No. 2012IRTSTHN007), and the Doctoral Foundation of Henan Polytechnic University (B2010-13).

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Authors and Affiliations

  1. School of Materials Science and Engineering, Henan Polytechnic University, Jiaozuo, 454000, China

    Yanping Fan & Baozhong Liu

  2. State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao, 066004, China

    Qiuming Peng & Junling Pan

  3. State Key Laboratory of Gansu Advanced Non-ferrous Metal Materials, Lanzhou University of Technology, Lanzhou, 730050, China

    Guangli Bi

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  1. Yanping Fan
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  2. Qiuming Peng
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  5. Baozhong Liu
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Correspondence to Baozhong Liu.

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Fan, Y., Peng, Q., Pan, J. et al. Strengthening Precipitate, Thermal Stability, and Mechanical Properties of Melt-Spun Mg-8Gd-3Nd Alloy. J. of Materi Eng and Perform 23, 250–254 (2014). https://doi.org/10.1007/s11665-013-0670-4

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  • DOI: https://doi.org/10.1007/s11665-013-0670-4

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