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Microstructure and mechanical properties of high-strength high-pressure die-cast Mg–4Al–3La–1Ca–0.3Mn alloy

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Abstract

A new high-pressure die-cast (HPDC) Mg–4Al–3La–1Ca–0.3Mn (ALaX431) alloy with high strength has successfully been fabricated. This HPDC alloy in peak-aged state exhibits tensile yield strength (TYS) of 220 MPa at room temperature and TYS of 145 MPa at 250 °C, higher than the corresponding strength of HPDC Mg alloys reported so far. These high strengths are mainly due to the formation of fine grained structure, semi-continuous reticular structure consisting of stable Al3La and (Mg,Al)2Ca particles along grain boundaries and numerous nanoscale Al2Ca precipitates within grains. Due to its higher strength than existing HPDC Mg alloys, the new developed alloy has great application potential.

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Acknowledgements

This work was financially supported by the National Natural Science Foundation of China (Nos. 51701200 and 11804030), the Fundamental Research Funds for the Central Universities (No. 3072020CF1009), the Open Funds of the State Key Laboratory of Rare Earth Resource Utilization (Nos. RERU2020008 and 2020012), the Scientific and Technological Developing Scheme of Jilin Province (No. 20200801048GH) and the Jilin Scientific and Technological Development Programs (No. 20200201240JC).

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Authors and Affiliations

  1. Key Laboratory of Superlight Materials and Surface Technology, Ministry of Education, Harbin Engineering University, Harbin, 150001, China

    Peng-Fei Qin, Yu-Ying He, Jing-Huai Zhang, Jin-Shu Xie & Xi-Ru Hua

  2. State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, China

    Peng-Fei Qin, Qiang Yang, Xi-Ru Hua & Jian Meng

  3. Department of Materials Science and Engineering, University of Tokyo, Tokyo, 113-8654, Japan

    Kai Guan

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  1. Peng-Fei Qin
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Correspondence to Qiang Yang or Jing-Huai Zhang.

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Qin, PF., Yang, Q., He, YY. et al. Microstructure and mechanical properties of high-strength high-pressure die-cast Mg–4Al–3La–1Ca–0.3Mn alloy. Rare Met. 40, 2956–2963 (2021). https://doi.org/10.1007/s12598-020-01661-5

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