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Structures and Mechanical properties of a super-high strength Al-Li alloy
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School of Materials Science and Engineering,Central South University,,,School of Materials Science and Engineering,Central South University,School of Materials Science and Engineering,Central South University,Southwest Aluminum Group Co Ltd,Southwest Aluminum Group Co Ltd

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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.

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[Li Jin-feng, Chen Yong-lai, Zhang Xu-hu, Liu Qing, Zheng Zi-qiao, Yao Yong, 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.]
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History
  • Received:September 28,2015
  • Revised:November 12,2015
  • Adopted:December 08,2015
  • Online: January 04,2018
  • Published: