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锂在Al-Zn-Mg-Cu合金时效析出过程中的作用及其对性能的影响

The Role of Lithium in the Aging Precipitation Process of Al-Zn-Mg-Cu Alloys and Its Effect on the Properties.

作者信息

Sun Jing-Ran, Dong Bai-Xin, Yang Hong-Yu, Shu Shi-Li, Qiu Feng, Jiang Qi-Chuan, Zhang Lai-Chang

机构信息

Key Laboratory of Automobile Materials, Ministry of Education and Department of Materials Science and Engineering, Jilin University, Renmin Street NO. 5988, Changchun 130025, China.

School of Materials Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, China.

出版信息

Materials (Basel). 2023 Jun 30;16(13):4750. doi: 10.3390/ma16134750.

DOI:10.3390/ma16134750
PMID:37445064
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10342766/
Abstract

It is well known that the development of lightweight alloys with improved comprehensive performance and application value are the future development directions for the ultra-high-strength 7xxx series Al-Zn-Mg-Cu alloys used in the aircraft field. As the lightest metal element in nature, lithium (Li) has outstanding advantages in reducing the density and increasing the elastic modulus in aluminum alloys, so Al-Zn-Mg-Cu alloys containing Li have gained widespread attention. Furthermore, since the Al-Zn-Mg-Cu alloy is usually strengthened by aging treatment, it is crucial to understand how Li addition affects its aging precipitation process. As such, in this article, the effects and mechanism of Li on the aging precipitation behavior and the impact of Li content on the aging precipitation phase of Al-Zn-Mg-Cu alloys are briefly reviewed, and the influence of Li on the service properties, including mechanical properties, wear resistance, and fatigue resistance, of Al-Zn-Mg-Cu alloys are explained. In addition, the corresponding development prospects and challenges of the Al-Zn-Mg-Cu-Li alloy are also proposed. This review is helpful to further understand the role of Li in Al-Zn-Mg-Cu alloys and provides a reference for the development of high-strength aluminum alloys containing Li with good comprehensive properties.

摘要

众所周知，开发具有更高综合性能和应用价值的轻质合金是飞机领域所用超高强度7xxx系列Al-Zn-Mg-Cu合金未来的发展方向。锂（Li）作为自然界中最轻的金属元素，在降低铝合金密度和提高弹性模量方面具有突出优势，因此含锂的Al-Zn-Mg-Cu合金受到广泛关注。此外，由于Al-Zn-Mg-Cu合金通常通过时效处理强化，了解锂的添加如何影响其时效析出过程至关重要。因此，本文简要综述了锂对Al-Zn-Mg-Cu合金时效析出行为的影响及机制，以及锂含量对时效析出相的影响，并阐述了锂对Al-Zn-Mg-Cu合金使用性能（包括力学性能、耐磨性和抗疲劳性）的影响。此外，还提出了Al-Zn-Mg-Cu-Li合金相应的发展前景和挑战。本综述有助于进一步理解锂在Al-Zn-Mg-Cu合金中的作用，并为开发具有良好综合性能的含锂高强度铝合金提供参考。

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