FEM SIMULATION AND ANALYSIS OF TEMPERATURE RISE DURING ASYMMETRIC CRYOROLLING OF ALUMINUM ALLOYS WITH A LARGE STRAIN

1 PUSTOVOITOV Denis
Co-authors:
1 PESIN Alexander 1 BIRYUKOVA Olesya
Institution:
1 Nosov Magnitogorsk State Technical University, Magnitogorsk, Russian Federation, pustovoitov_den@mail.ru, pesin@bk.ru, fimapatisonchik@inbox.ru
Conference:
27th International Conference on Metallurgy and Materials, Hotel Voronez I, Brno, Czech Republic, EU, May 23rd - 25th 2018
Proceedings:
Proceedings 27th International Conference on Metallurgy and Materials
Pages:
298-303
ISBN:
978-80-87294-84-0
ISSN:
2694-9296
Published:
24th October 2018
Proceedings of the conference were published in Web of Science and Scopus.
Metrics:
20 views / 12 downloads
Abstract

Asymmetric cryorolling is a technique that combines the features of asymmetric rolling and cryorolling, and can be used to produce ultrafine grained aluminum sheets. The problem with asymmetric cryorolling is the heat generated in the roll gap by high contact friction and the plastic deformation. Prediction of temperature rise during asymmetric cryorolling is very important. The temperature rise can be as large as to increase the sheet temperature above the cryogenic temperature. Therefore it is necessary to estimate the actual sheet temperature during asymmetric cryorolling for a precise control of recovery, and hence of the grain size. This paper presents the results of the finite element simulation of heat transfer during asymmetric cryorolling of aluminum alloys. The effects of thickness reduction (20 – 60 %), rolls speed ratio (0 – 60 %), friction coefficient (0.1 – 0.4), rolling velocity (0.05 – 10 m/s) and roll temperature (77 – 300 K) on the temperature rise in the strip during asymmetric cryorolling were found. The results of investigation can be useful for the development of the optimal treatment process of aluminum alloys by cryogenic severe plastic deformation to obtain the ultrafine grain structure and high strength properties.

Keywords: Asymmetric cryorolling, aluminum alloy, finite element method, temperature field, severe plastic deformation
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