Anisotropy of mechanical properties of 2297-T87 Al–Li alloy thick plates

Yuji Bai; Zhixiu Wang; Bo Jiang; Mengqi Li; Cong Zhu; Xiaotong Gu; Hai Li

doi:10.1007/s12613-023-2652-3

Volume 30 Issue 11

Nov. 2023

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Article Navigation > International Journal of Minerals, Metallurgy and Materials > 2023 > 30(11): 2212-2223

Yuji Bai, Zhixiu Wang, Bo Jiang, Mengqi Li, Cong Zhu, Xiaotong Gu, and Hai Li, Anisotropy of mechanical properties of 2297-T87 Al–Li alloy thick plates, Int. J. Miner. Metall. Mater., 30(2023), No. 11, pp. 2212-2223. https://doi.org/10.1007/s12613-023-2652-3

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Yuji Bai, Zhixiu Wang, Bo Jiang, Mengqi Li, Cong Zhu, Xiaotong Gu, and Hai Li, Anisotropy of mechanical properties of 2297-T87 Al–Li alloy thick plates, Int. J. Miner. Metall. Mater., 30(2023), No. 11, pp. 2212-2223. https://doi.org/10.1007/s12613-023-2652-3

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Research Article

Anisotropy of mechanical properties of 2297-T87 Al–Li alloy thick plates

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Corresponding author:
Hai Li E-mail: Lehigh_73@163.com
Received: 3 February 2023; Revised: 23 March 2023; Accepted: 11 April 2023; Available online: 12 April 2023

Abstract

Abstract

The tensile properties of 2297-T87 Al–Li alloy thick plates at different thickness position and in different direction were analyzed via tensile testing, optical microscopy (OM), X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive spectrometry (EDS), and transmission electron microscopy (TEM). Results indicated that the ultimate tensile strength (UTS) and yield strength (YS) of the alloy decreased firstly and then increased from the 1/8T position to the 1/2T position, whereas elongation to failure (E_f) decreased gradually such that its value along the rolling direction (RD) was higher than those along the transverse direction (TD) at the same thickness position. From the 1/8T position to the 3/8T position of the alloy, the UTS and YS along the TD were higher than those along the RD. At the 1/2T position of the alloy, the UTS, YS, and E_f along the RD were the highest, whereas those along the normal direction (ND) were the lowest. Microstructural observations further revealed that the anisotropy of tensile properties was related to grain morphology, crystal texture, second-phase particles, and Li atom segregation.
- 2297 alloy thick plate;
- tensile properties;
- anisotropy;
- grain morphology;
- second-phase particles

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