Abd El-Aty Ali, Xu Yong, Guo Xunzhong, Zhang Shi-Hong, Ma Yan, Chen Dayong
Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, PR China.
School of Engineering Science, University of Chinese Academy of Sciences, Beijing 100049, PR China.
J Adv Res. 2017 Dec 26;10:49-67. doi: 10.1016/j.jare.2017.12.004. eCollection 2018 Mar.
Al-Li alloys are attractive for military and aerospace applications because their properties are superior to those of conventional Al alloys. Their exceptional properties are attributed to the addition of Li into the Al matrix, and the technical reasons for adding Li to the Al matrix are presented. The developmental history and applications of Al-Li alloys over the last few years are reviewed. The main issue of Al-Li alloys is anisotropic behavior, and the main reasons for the anisotropic tensile properties and practical methods to reduce it are also introduced. Additionally, the strengthening mechanisms and deformation behavior of Al-Li alloys are surveyed with reference to the composition, processing, and microstructure interactions. Additionally, the methods for improving the formability, strength, and fracture toughness of Al-Li alloys are investigated. These practical methods have significantly reduced the anisotropic tensile properties and improved the formability, strength, and fracture toughness of Al-Li alloys. However, additional endeavours are required to further enhance the crystallographic texture, control the anisotropic behavior, and improve the formability and damage tolerance of Al-Li alloys.
铝锂合金因其性能优于传统铝合金而在军事和航空航天应用中颇具吸引力。它们的优异性能归因于向铝基体中添加了锂，并阐述了向铝基体中添加锂的技术原因。回顾了过去几年铝锂合金的发展历程及应用情况。铝锂合金的主要问题是各向异性行为，还介绍了其拉伸性能各向异性的主要原因及降低该现象的实用方法。此外，参照成分、加工工艺及微观结构的相互作用，研究了铝锂合金的强化机制及变形行为。另外，还研究了改善铝锂合金可成形性、强度及断裂韧性的方法。这些实用方法显著降低了铝锂合金的拉伸性能各向异性，并提高了其可成形性、强度及断裂韧性。然而，还需要进一步努力，以进一步改善晶体织构、控制各向异性行为，并提高铝锂合金的可成形性及损伤容限。
