Research on microstructure and mechanical properties of Al-Zn-Mg-Cu alloy when modified by La, Ce and thermo-mechanical treatment

Keywords: modification, thermal-mechanical, deformation, grain size, homogeneous, recrystallization annealing, ductility

Abstract

Influence of rare-earth (La, Ce) and thermo-mechanical treatment on microstructure and mechanical properties of Al-Zn-Mg-Cu alloy are presented in this article. After casting, the alloy which was modified by La, Ce, the grain size of samples obtained around 40–50 µm compared to that of without about 65 µm; and after homogeneous, the grain sizes is about 30 µm. After the cold deformation process, the distance between plates is 10 µm. By EDS after casting, the samples have tended to more La, Ce elements at the grain boundary, after homogeneous, the uniformation distribution of rare-earths was presented by mapping of EDS’s results. In addition, after rolling and heat treatment, the elements were found on the grain boundary and matrix. After recrystallization annealing, the grain size is around 10 µm with the modification sample. The grain size was reduced by two processes of modification as well as thermal-mechanical treatment is a condition for increasing the ductility of the studied alloy. Further, as a result of ability deformation from the tensile test, these results demonstrate that the tensile test obtained 140 % when adding La, Ce contents into the alloy combine with thermal-mechanical treatment. The combined used of La, Ce and thermal-mechanical treatment have increased the ductility of Al-Zn-Mg-Cu alloy

Downloads

Download data is not yet available.

Author Biographies

Thi Ngoc Mai Bui, Vietnam Maritime University; Hanoi University of Science and Technology

Faculty of Ship Building

School of Materials Science and Engineering

Anh Tuan Vu, Vietnam Maritime University

Faculty of Basic – Fundamental Sciences

Duong Nam Nguyen, Vietnam Maritime University

School of Mechanical Engineering

Duc Huy Tran, Hanoi University of Science and Technology

School of Materials Science and Engineering

References

Bhatta, L., Pesin, A., Zhilyaev, A. P., Tandon, P., Kong, C., Yu, H. (2020). Recent Development of Superplasticity in Aluminum Alloys: A Review. Metals, 10 (1), 77. doi: https://doi.org/10.3390/met10010077

Yang, J., Giraud, E., Dal Santo, P., Boude, S., Lebrun, J.-L. (2019). Prediction of superplastic forming of 7475 aluminium alloy sheets. IOP Conference Series: Materials Science and Engineering, 576 (1), 012029. doi: https://doi.org/10.1088/1757-899x/576/1/012029

Li, S., Huang, Z., Jin, S. (2019). Superplastic Behavioral Characteristics of Fine-Grained 5A70 Aluminum Alloy. Metals, 9 (1), 62. doi: https://doi.org/10.3390/met9010062

Georgy, K., Neelakantan, L., Kumar, K. C. H., Mukherjee, M. (2020). Influence of Cu, Zn and Si alloying elements on Al alloy foams produced using Mg blowing agent. Journal of Materials Science, 56 (3), 2612–2630. doi: https://doi.org/10.1007/s10853-020-05381-0

Robson, J. D. (2019). Analytical electron microscopy of grain boundary segregation: Application to Al-Zn-Mg-Cu (7xxx) alloys. Materials Characterization, 154, 325–334. doi: https://doi.org/10.1016/j.matchar.2019.06.016

Wu, R., Chen, X. (2012). Effects of rare-earth element on microstructure and mechanical properties of cast Al-Zn-Mg-Cu alloy. Tezhong Zhuzao Ji Youse Hejin/Special Cast. Nonferrous Alloy., 32 (12).

Hatakeyama, D., Nishimura, K., Matsuda, K., Namiki, T., Lee, S., Nunomura, N. et. al. (2018). Effect of Copper Addition on the Cluster Formation Behavior of Al-Mg-Si, Al-Zn-Mg, and Al-Mg-Ge in the Natural Aging. Metallurgical and Materials Transactions A, 49 (11), 5871–5877. doi: https://doi.org/10.1007/s11661-018-4832-8

Masuda, H., Sato, E. (2020). Diffusional and dislocation accommodation mechanisms in superplastic materials. Acta Materialia, 197, 235–252. doi: https://doi.org/10.1016/j.actamat.2020.07.042

Chen, Z. P., Thomson, P. F. (2004). A study of post-form static and fatigue properties of superplastic 7475-SPF and 5083-SPF aluminium alloys. Journal of Materials Processing Technology, 148 (2), 204–219. doi: https://doi.org/10.1016/s0924-0136(03)00867-7

Aksenov, S., Sorgente, D. (2020). Determination of biaxial stress–strain curves for superplastic materials by means of bulge forming tests at constant stress. CIRP Journal of Manufacturing Science and Technology, 31, 618–627. doi: https://doi.org/10.1016/j.cirpj.2020.09.002

Mikhaylovskaya, A. V., Yakovtseva, O. A., Sitkina, M. N., Kotov, A. D., Irzhak, A. V., Krymskiy, S. V., Portnoy, V. K. (2018). Comparison between superplastic deformation mechanisms at primary and steady stages of the fine grain AA7475 aluminium alloy. Materials Science and Engineering: A, 718, 277–286. doi: https://doi.org/10.1016/j.msea.2018.01.102

Mikhaylovskaya, A., Yakovtseva, O., Sitkina, M., Kotov, A. D. (2020). Grain-boundary and intragranular deformation in ultrafine-grained aluminum-based alloy at high strain rate. Materials Letters, 276, 128242. doi: https://doi.org/10.1016/j.matlet.2020.128242

Kassner, M. E. (2015). Fundamentals of Creep in Metals and Alloys. Butterworth-Heinemann. doi: https://doi.org/10.1016/c2012-0-06071-1

Fang, H. C., Liu, T., Zhu, J. M., Xiao, P. (2019). Effects of minor Yb and transition element on grain boundary character and properties of super strength Al-Zn-Mg-Cu alloys. Zhongguo Youse Jinshu Xuebao/Chinese J. Nonferrous Met., 29 (7).

Li, C., Wu, S., Lü, S., Li, J., Liu, L., Xia, L. (2021). Effects of Excessive Zr Content and Ultrasonic Treatment on Microstructure and Mechanical Properties of Al-Zn-Mg-Cu Alloy. Metals, 11 (4), 632. doi: https://doi.org/10.3390/met11040632

Fang, H., Yang, H., Zhu, J., Xiao, P., Chen, Z., Liu, T. (2020). Effect of Minor Cr, Mn, Zr or Ti on Recrystallization, Secondary Phases and Fracture Behaviour of Al-Zn-Mg-Cu-Yb Alloys,Cr, Mn, Zr, Ti. Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering, 49 (3).

Tian, S. K., Li, J. Y., Zhang, J. L., Lü, D. (2019). Effect of Sc on the microstructure and properties of 7056 aluminum alloy. Gongcheng Kexue Xuebao/Chinese J. Eng., 41 (10), 1298–1306. doi: https://doi.org/10.13374/j.issn2095-9389.2018.10.22.003


👁 178
⬇ 183
Published
2022-05-31
How to Cite
Bui, T. N. M., Vu, A. T., Nguyen, D. N., & Tran, D. H. (2022). Research on microstructure and mechanical properties of Al-Zn-Mg-Cu alloy when modified by La, Ce and thermo-mechanical treatment. EUREKA: Physics and Engineering, (3), 101-111. https://doi.org/10.21303/2461-4262.2022.001792
Section
Material Science