Journal of Materials Research and Technology Journal of Materials Research and Technology
J Mater Res Technol 2018;7:326-30 DOI: 10.1016/j.jmrt.2018.03.001
Original Article
Simulation of the Accumulative Roll-Bonding process through warm torsion test
Lumena Glória de Souza Nunes, , Marcelo Lucas Pereira Machado
Federal Institute of Education, Science and Technology of Espírito Santo – IFES, Vitória, Brazil
Received 20 November 2017, Accepted 13 March 2018
Abstract

The objective of this work was simulating the process of severe plastic deformation, specifically the Accumulative Roll-Bonding process (ARB) in low carbon steel, by warm torsion test, using the typical ARB process parameters. The torsion test was performed at 500°C, using a total equivalent strain of 4.0, with increment of 0.8 per pass and keeping the constant strain rate of 0.1s−1, as well as intermediate strains of 0.8, 1.6, 2.4 and 3.2. Along with the reduction of the average grain size there was an increase in the hardness of 43%. Torsion test was performed until failure, increasing the yield stress by about 380MPa. After processing, the average grains size with 0.93μm were obtained showing that the torsion test is an efficient tool for simulating ARB process.

Keywords
Torsion test, Severe plastic deformation, Accumulative Roll-Bonding, Ultrafine grain
J Mater Res Technol 2018;7:326-30 DOI: 10.1016/j.jmrt.2018.03.001
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