Effects of texture and precipitates characteristics on anisotropic hardness evolution during artificial aging for an Al–Cu–Li alloy

Anisotropy of mechanical properties has limited the further application of Al–Cu–Li alloys. Previous research efforts were mostly focused on the anisotropic tensile properties. In the present study, significant hardness anisotropy evolution, measured during artificial aging, was also established whe...

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Autores principales: Shuwei Duan, Fuqiang Guo, Yongang Zhang, Kai Chong, Seungwon Lee, Kenji Matsuda, Yong Zou
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Lenguaje:EN
Publicado: Elsevier 2021
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Acceso en línea:https://doaj.org/article/8c4df6a5ae8f4cfe9c9509a44c4edfa9
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spelling oai:doaj.org-article:8c4df6a5ae8f4cfe9c9509a44c4edfa92021-11-06T04:19:27ZEffects of texture and precipitates characteristics on anisotropic hardness evolution during artificial aging for an Al–Cu–Li alloy0264-127510.1016/j.matdes.2021.110216https://doaj.org/article/8c4df6a5ae8f4cfe9c9509a44c4edfa92021-12-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S0264127521007711https://doaj.org/toc/0264-1275Anisotropy of mechanical properties has limited the further application of Al–Cu–Li alloys. Previous research efforts were mostly focused on the anisotropic tensile properties. In the present study, significant hardness anisotropy evolution, measured during artificial aging, was also established when loading in different directions. It was found that different amounts of inclined/face-on would be encountered when loading along different directions, resulting from the fiber texture and inhomogeneous distribution of T1 (Al2CuLi) variants along different directions for the samples without pre-stretching. The resistance to hardness loading is different between the face-on/inclined T1 and edge-on T1 due to its high aspect ratio, so the measured anisotropic hardness is obtained. Moreover, the characteristics of precipitates also play an important role in the anisotropic hardness evolution, the strong anisotropy of hardness only appears in the alloys that contained large diameters and a low density of T1 phase or θ' (Al2Cu) phase. After applying pre-stretching, the predominant T1 phase precipitates with small diameters and a high density, which helps to facilitate the isotropic hardness evolution during artificial aging. These findings provide a necessary supplement for the hardness evaluation where a high aspect ratio of precipitate is involved.Shuwei DuanFuqiang GuoYongang ZhangKai ChongSeungwon LeeKenji MatsudaYong ZouElsevierarticleAl–Cu–Li alloyAging hardeningAnisotropyTexturePrecipitateMaterials of engineering and construction. Mechanics of materialsTA401-492ENMaterials & Design, Vol 212, Iss , Pp 110216- (2021)
institution DOAJ
collection DOAJ
language EN
topic Al–Cu–Li alloy
Aging hardening
Anisotropy
Texture
Precipitate
Materials of engineering and construction. Mechanics of materials
TA401-492
spellingShingle Al–Cu–Li alloy
Aging hardening
Anisotropy
Texture
Precipitate
Materials of engineering and construction. Mechanics of materials
TA401-492
Shuwei Duan
Fuqiang Guo
Yongang Zhang
Kai Chong
Seungwon Lee
Kenji Matsuda
Yong Zou
Effects of texture and precipitates characteristics on anisotropic hardness evolution during artificial aging for an Al–Cu–Li alloy
description Anisotropy of mechanical properties has limited the further application of Al–Cu–Li alloys. Previous research efforts were mostly focused on the anisotropic tensile properties. In the present study, significant hardness anisotropy evolution, measured during artificial aging, was also established when loading in different directions. It was found that different amounts of inclined/face-on would be encountered when loading along different directions, resulting from the fiber texture and inhomogeneous distribution of T1 (Al2CuLi) variants along different directions for the samples without pre-stretching. The resistance to hardness loading is different between the face-on/inclined T1 and edge-on T1 due to its high aspect ratio, so the measured anisotropic hardness is obtained. Moreover, the characteristics of precipitates also play an important role in the anisotropic hardness evolution, the strong anisotropy of hardness only appears in the alloys that contained large diameters and a low density of T1 phase or θ' (Al2Cu) phase. After applying pre-stretching, the predominant T1 phase precipitates with small diameters and a high density, which helps to facilitate the isotropic hardness evolution during artificial aging. These findings provide a necessary supplement for the hardness evaluation where a high aspect ratio of precipitate is involved.
format article
author Shuwei Duan
Fuqiang Guo
Yongang Zhang
Kai Chong
Seungwon Lee
Kenji Matsuda
Yong Zou
author_facet Shuwei Duan
Fuqiang Guo
Yongang Zhang
Kai Chong
Seungwon Lee
Kenji Matsuda
Yong Zou
author_sort Shuwei Duan
title Effects of texture and precipitates characteristics on anisotropic hardness evolution during artificial aging for an Al–Cu–Li alloy
title_short Effects of texture and precipitates characteristics on anisotropic hardness evolution during artificial aging for an Al–Cu–Li alloy
title_full Effects of texture and precipitates characteristics on anisotropic hardness evolution during artificial aging for an Al–Cu–Li alloy
title_fullStr Effects of texture and precipitates characteristics on anisotropic hardness evolution during artificial aging for an Al–Cu–Li alloy
title_full_unstemmed Effects of texture and precipitates characteristics on anisotropic hardness evolution during artificial aging for an Al–Cu–Li alloy
title_sort effects of texture and precipitates characteristics on anisotropic hardness evolution during artificial aging for an al–cu–li alloy
publisher Elsevier
publishDate 2021
url https://doaj.org/article/8c4df6a5ae8f4cfe9c9509a44c4edfa9
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