Influence of grain size and orientation on the uneven precipitation in Al–Cu–Li alloys

Xusheng Yang; Xin Wang; Weijiu Huang; Dehong Lu; Mofan Liu; Xianghui Zhu; Haipeng Dong; Weiyi Qiu

Journal of Materials Research and Technology (Nov 2024)

Influence of grain size and orientation on the uneven precipitation in Al–Cu–Li alloys

Xusheng Yang,
Xin Wang,
Weijiu Huang,
Dehong Lu,
Mofan Liu,
Xianghui Zhu,
Haipeng Dong,
Weiyi Qiu

Affiliations

Xusheng Yang: College of Materials Science and Engineering, Chongqing University of Arts and Sciences, Chongqing, 402160, China
Xin Wang: College of Materials Science and Engineering, Chongqing University of Arts and Sciences, Chongqing, 402160, China; Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming, 650093, China
Weijiu Huang: College of Materials Science and Engineering, Chongqing University of Arts and Sciences, Chongqing, 402160, China; Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming, 650093, China; Corresponding author. College of Materials Science and Engineering, Chongqing University of Arts and Sciences, Chongqing, 402160, China.
Dehong Lu: Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming, 650093, China
Mofan Liu: College of Materials Science and Engineering, Chongqing University of Arts and Sciences, Chongqing, 402160, China
Xianghui Zhu: College of Materials Science and Engineering, Chongqing University of Arts and Sciences, Chongqing, 402160, China
Haipeng Dong: Chongqing Materials Research Institute Co., Ltd, Chongqing, 400707, China; National Engineering Research Center for Instrument Functional Materials, Chongqing, 400707, China
Weiyi Qiu: Chongqing Materials Research Institute Co., Ltd, Chongqing, 400707, China; National Engineering Research Center for Instrument Functional Materials, Chongqing, 400707, China

Journal volume & issue: Vol. 33
pp. 8780 – 8788

Abstract

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The effects of grain size and orientation on the precipitation behavior of the T1 (Al2CuLi) phase in 2050 T8 sheets are quantitatively investigated using transmission Kikuchi diffraction (TKD) and transmission electron microscope (TEM). The results indicate that the T1 phase predominantly precipitates at high densities on the activated slip planes, results in a reduction of the precipitation strengthening effect. In grains of near the R-Cube orientation, the volume fraction of T1 phase within the sub-grains is approximately 12% higher than that in the recrystallized grains, while the contribution to strengthening effect through precipitation is comparable.

Published in Journal of Materials Research and Technology

ISSN: 2238-7854 (Print); 2214-0697 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Technology: Mining engineering. Metallurgy
Website: https://www.journals.elsevier.com/journal-of-materials-research-and-technology/

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