Journals →  Tsvetnye Metally →  2021 →  #8 →  Back

ArticleName Analysis of distribution of deformations during tensile straightening of hot-rolled strips from aluminum alloys
DOI 10.17580/tsm.2021.08.13
ArticleAuthor Loginov Yu. N., Sobolev D. O.

Ural Federal University, Yekaterinburg, Russia:

Yu. N. Loginov, Professor of the Chair for Metal forming, Doctor of Technical Sciences, e-mail:
D. O. Sobolev, Undergraduate, e-mail:


In order to reveal the regularities of the change in the dimensions of strips of aluminum alloys during their straightening by stretching, an industrial experiment was carried out on a straightening-stretching machine with a force of 70 MN. Certain control points were assigned on the plate surface and strip thicknesses were recorded there before and after straightening. The measurements were made on 12 hot-rolled plates with a thickness of 25–130 mm from four types of alloys. The sample size is divided into two parts: measuring points located at the periphery, closer to the grippers, and points in the central part of the workpiece. The coefficients of plastic anisotropy are determined. It was found that the coefficient of plastic anisotropy takes on higher values in the peripheral part of the strip than in the central one. For alloys D16, 5083 and AMg6, respectively, there is a general tendency: with increasing thickness, the coefficient of plastic anisotropy increases. In the course of statistical processing, along with the average values, the dispersions of the strip thicknesses before and after straightening were also determined. In the range of thicknesses 20–60 mm, we can talk about the approximate equality of dispersions. However, above 80 mm, the indicator begins to grow, while at a thickness of 130 mm, the dispersion increases by about four times relative to this characteristic for small thicknesses. In general, the setting of the strip elongation parameters during tension straightening should lead to such a change in thickness, which should provide the value in the tolerance field. It is shown that the change in strip thicknesses depends on the initial one obtained during rolling. At thicknesses of 100–130 mm, plastic deformation approaches the conditions of isotropic material`s deformation. For thinner hot-rolled strips, the coefficient of plastic anisotropy varies in the range of 0.4–0.9, and the greater the strip thickness, the greater it is.
This work was carried out with partial financial support from Decree No. 211 of the Government of the Russian Federation, contract No. 02.A03.21.

keywords Aluminum alloys, flat products, tensile straightening, anisotropy, plastic deformation, Lankford parameter.

1. Lobanov M. L., Loginov Y. N., Danilov S. V., Golovin M. A. et al. Effect of hot rolling rate on the structure and texture condition of plates of the Al – Si – Mg alloy system. Metal Science and Heat Treatment. 2018. Vol. 60, Iss. 5-6. pp. 322–328.
2. Kolobnev N. I., Setyukov О. А., Khokhlatova L. B., Oglodkov М. S. Influence of crystallographic orientations on properties of plates made of Al — Lialloys B-1461 and 1424. Tekhnologiya legkikh splavov. 2010. No. 1. pp. 100–106.
3. Danilov S. V., Reznik P. L., Lobanov М. L., Golovnin М. А. et. al. Influence of hot rolling on the anisotropy of mechanical properties of aluminum alloy 6061. Vestnik Yuzhno-Uralskogo gosudarstvennogo universiteta. Seriya Metallurgiya. 2017. Vol. 17, No. 1. pp. 73–80.
4. Ha J., Fones J., Kinsey B. L., Korkolis Y. P. Plasticity and formability of annealed, commercially-pure aluminum: Experiments and modeling. Materials. 2020. Vol. 13, Iss. 19. No. 4285. pp. 1–29.
5. Li Z. J., Winther G., Hansen N. Anisotropy of plastic deformation in rolled aluminum. Materials Science and Engineering A. 2004. pp. 387–389.
6. Cusset R., Azzouz F., Besson J., Dragon-Louiset M. et al. Modeling plasticity of an aluminum 2024T351 thick rolled plate for cold forming applications. International Journal of Solids and Structures. 2020. Vol. 202. pp. 463–474.
7. Remnev К. S. Stability of a thin strip anisotropic material during tensile straightening. Izvestiya Tulskogo gosudarstvennogo universiteta. Tekhnicheskie nauki. 2013. No. 4. pp. 96–107.
8. Wen X. Y., Lee W. B. Orientation hardening and instability of an AA3003 aluminum alloy sheet under in-plane strain stretching. Scripta Materialia. 2000. Vol. 43, Iss. 1. pp. 1–7.
9. Zhu C.-C., Luo J.-Y. Stretch rate and deformation for pre-stretching aluminum alloy sheet. Journal of Central South University of Technology. 2012. Vol. 19, Iss. 4. pp. 875–881.
10. Loginov Yu. N., Sobolev D. О. Straightening modeling by stretching an aluminum alloy plate. Kuznechno-shtampovochnoe proizvodstvo. Obrabotka materialov davleniem. 2019. No. 5. pp. 41–44.
11. Xiaolian Zhao, Ling Chen, Kezhun Heb, Ni Wu et al. Effect of contact heat transfer on hot rolling of aluminum alloy. Procedia Manufacturing. 2019. Vol. 37. pp. 91–96.
12. Xin-Wei She, Xian-Quan Jiang, Pu-Quan Wang, Bin-Bin Tang et al. Relationship between microstructure and mechanical properties of 5083 aluminum alloy thick plate. Transactions of Nonferrous Metals Society of China. 2020. Vol. 30, Iss. 7. pp. 1780–1789.
13. Pujun Hao, Anrui He, Wenquan Sun. Formation mechanism and control methods of inhomogeneous deformation during hot rough rolling of aluminum alloy plate. Archives of Civil and Mechanical Engineering. 2018. Vol. 18, Iss. 1. pp. 245–255.
14. GOST 11701–84. Metals. Methods of tensile testing of thin sheets and strips. Introduced: 01.01.1986.
15. Rudskoy А. I. Scientific foundations for control of the structure and properties of steels in processes of thermomechanical treatment: monograph. Moscow: RAN, 2019. 276 p.
16. Wuyang Liu, Takashi Lizuka. Fundamental apparent plastic anisotropy of duplex embossed aluminum sheet. International Journal of Mechanical Sciences. 2019. Vol. 163, No. 105–125.
17. Motoki Terano, Kazuhiko Kitamura, Masahiko Yoshino. Distribution of Plastic Anisotropy in Thickness Direction for Plate. Procedia Engineering. 2014. Vol. 81. pp. 419–424.
18. Aryshenskiy Е. V. Study of the features of texture evolution during hot rolling in a continuous group of aviation aluminum alloys. Fundamentalnye problemy sovremennogo materialovedeniya. 2020. Vol. 17, No. 3. pp. 350–354.

Language of full-text russian
Full content Buy