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李劲风,陈永来,张绪虎,刘晴,郑子樵,姚勇,王剑.一种新型超高强铝锂合金板材的组织与力学性能[J].稀有金属材料与工程(英文),2017,46(12):3715~3720.[Li Jin-feng,Chen Yong-lai,Zhang Xu-hu,Liu Qing,Zheng Zi-qiao,Yao Yong and Wang Jian.Structures and Mechanical properties of a super-high strength Al-Li alloy[J].Rare Metal Materials and Engineering,2017,46(12):3715~3720.]
Structures and Mechanical properties of a super-high strength Al-Li alloy
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Received:September 28, 2015  Revised:November 12, 2015
DOI:
Key words: Al-Li alloy  strength  micro-structure  deformation texture
Foundation item:863项目(项目号2013AA032401),中南大学教师基金(项目号2013JSJJ 001)
Author NameAffiliation
Li Jin-feng,Chen Yong-lai,Zhang Xu-hu,Liu Qing,Zheng Zi-qiao,Yao Yong and Wang Jian  
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Abstract:
      The structures and mechanical properties of a new super-high strength Al-Li alloy developed by this group were investigated. The alloy possessed excellent properties, of which the tensile strength was greater than 600 MPa, and the elongation higher than 10%. After T8 aging, the strengthening precipitates in both cold-rolled sheet with 2 mm thickness and hot-rolled plate with 10 mm thickness were T1(Al2CuLi) and q¢(Al2Cu), and their fraction and size were basically same in the two plates with different thickness. The strength of T8-aged plate with 10 mm thickness was 50~70 MPa higher than that the T8-aged sheet with 2 mm thickness. This strength enhancement was originated from the texture fraction after solution treatment. The volume fraction of the deformation texture in the solutionized hot-rolled plate with 10 mm thickness was much higher.