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Strengthening-toughening methods and mechanisms of Mg–Li alloy: a review

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Abstract

Magnesium–lithium (Mg–Li) alloy, as the lightest metal structure material, has unparalleled market prospects in aerospace, weapons and equipment, electronic technology, transportation, and many other fields. However, it is hard to balance the superlight and high strength of Mg–Li alloy, and the inferior high-temperature strength and poor high-temperature stability limit the wide application of Mg–Li alloy. At present, the main methods to improve the mechanical properties of Mg–Li alloy are alloying, grain refinement, and compound strengthening. The domestic and overseas research progress in the strengthening and toughening methods and mechanisms of Mg–Li alloy are reviewed, and the future development of the high strength and high toughness Mg–Li alloy is prospected.

摘要

作为最轻的金属结构材料, Mg–Li合金在航空航天、武器装备、电子科技以及交通运输等领域具有广阔的应用前景。然而, Mg–Li合金的超轻和高强度很难兼顾, 较差的高温强度和稳定性限制了该合金的广泛应用。目前, 提高Mg-Li合金力学性能的主要途径是合金化强化、细晶强化和复合强化。本文介绍了国内外学者在镁锂合金强韧化方法与机理方面的研究进展, 并对高强韧镁锂合金的研发趋势进行了展望。

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Reproduced with permission from Ref. [36]. Copyright 2015, Elsevier B.V

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Fig. 5

Copyright 2013, The Minerals, Metals & Materials Society and ASM International

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Reproduced with permission from Ref. [58]. Copyright, 2015 Elsevier B.V

Fig. 7

Reproduced with permission from Ref. [60]. Copyright 2018 by the authors

Fig. 8

Reproduced with permission from Ref. [61]. Copyright 2017, Published by Elsevier Ltd on behalf of the editorial office of Journal of Materials Science & Technology

Fig. 9

Reproduced with permission from Ref. [48]. Copyright 2017, Elsevier B.V

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Acknowledgements

This study was financially supported by the National Natural Science Foundation of China (Nos. 51771115, 51775334, 51821001 and U2037601) and the Joint Fund for Space Science and Technology (No. 6141B06310106).

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  1. National Engineering Research Center of Light Alloy Net Forming and State Key Laboratory of Metal Matrix Composite, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China

    Xiang Peng, Wen-Cai Liu & Guo-Hua Wu

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Peng, X., Liu, WC. & Wu, GH. Strengthening-toughening methods and mechanisms of Mg–Li alloy: a review. Rare Met. 41, 1176–1188 (2022). https://doi.org/10.1007/s12598-021-01874-2

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