Achieving high strength and large ductility of an ultrafine‑grained 211ZX aluminium alloy processed by improved thermomechanical processing

Luo, Tao; Lei, Lei; Feng, Ke; Yang, Ming; Jiang, Yun

doi:10.1007/s43452-023-00664-0

Artykuł - szczegóły

Tytuł artykułu

Achieving high strength and large ductility of an ultrafine‑grained 211ZX aluminium alloy processed by improved thermomechanical processing

Autorzy

Luo Tao , Lei Lei , Feng Ke , Yang Ming , Jiang Yun

Wybrane pełne teksty z tego czasopisma

http://www.springer.com/journal/43452

Identyfikatory

DOI

10.1007/s43452-023-00664-0

Warianty tytułu

Języki publikacji

Abstrakty

Simultaneously achieving high strength and ductility has been a long-standing goal in aluminum alloys, while the increase in strength usually leads to ductility loss. In this study, a novel thermomechanical treatment (TMT) method, i.e., pre-existing precipitation in coarse grain (CG) and cryogenic rolling plus warm rolling followed by peak aging, is developed to achieve high strength and good ductility in 211ZX aluminum alloy. As a result, a composite nanostructure including ultrafine-grained (UFG) and nanoprecipitation is obtained. Compared to a conventional T6 sample, the multi-step TMT sample has a finer grain (205 nm), while numerous GP zones and θ" phases are dispersed inside the grain. The precipitation characteristics are similar to the T6 sample. The yield strength (635 MPa) and ultimate tensile strength (690 MPa) are about 81% and 53% higher than the T6 sample, respectively, with only a slight decrease in plasticity. Microstructural characterization and thermodynamic analysis confirmed that pre-existing precipitates and cryogenic temperatures facilitate the formation of the composite nanostructure. Quantitatively strengthening calculations demonstrate that the high strength is attributed to the ultra-fine grain strengthening and precipitation strengthening, while the high plasticity is mainly due to the reduction of dislocation density caused by recovery and recrystallization during the aging process as well as the massive production of nano-GIPs (interior grain precipitates).

Słowa kluczowe

211ZX aluminum alloy multistep thermomechanical treatment ultra-fine grained microstructure precipitation behavior strength ductility synergy

stop aluminium 211ZX obróbka termomechaniczna mikrostruktura drobnoziarnista

Wydawca

Springer
Wrocław University of Science and Technology

Czasopismo

Archives of Civil and Mechanical Engineering

Rocznik

2023

Tom

Vol. 23, no. 2

Strony

art. no. e127, 2023

Opis fizyczny

Bibliogr. 57 poz., rys., tab., wykr.

Twórcy

autor

Luo Tao

School of Materials and Metallurgy, College of Materials and Metallurgy, Guizhou University, Guiyang 550025, China

autor

Lei Lei

State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’an 710072, China
School of Physics and Optoelectronic Engineering, Yangtze University, Jingzhou 434023, China

autor

Feng Ke

School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 110004, China

autor

Yang Ming

myang5@gzu.edu.cn

School of Materials and Metallurgy, College of Materials and Metallurgy, Guizhou University, Guiyang 550025, China

autor

Jiang Yun

j_yun7907@163.com

School of Mechanical Engineering, Guizhou University, Guiyang 550025, China

Bibliografia

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Uwagi

Opracowanie rekordu ze środków MNiSW, umowa nr SONP/SP/546092/2022 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2024).

Typ dokumentu

Bibliografia

Identyfikator YADDA

bwmeta1.element.baztech-74970267-efd6-4fa2-b472-64d7ac04e46f