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Investigation on Softening Mechanism of 5754 Aluminum Alloy during Multistage Hot Deformation
Version 1
: Received: 15 March 2017 / Approved: 16 March 2017 / Online: 16 March 2017 (18:28:52 CET)
A peer-reviewed article of this Preprint also exists.
Huang, C.-Q.; Deng, J.; Wang, S.-X.; Liu, L.-L. An Investigation on the Softening Mechanism of 5754 Aluminum Alloy during Multistage Hot Deformation. Metals 2017, 7, 107. Huang, C.-Q.; Deng, J.; Wang, S.-X.; Liu, L.-L. An Investigation on the Softening Mechanism of 5754 Aluminum Alloy during Multistage Hot Deformation. Metals 2017, 7, 107.
Abstract
Isothermal interrupted hot compression tests of 5754 aluminum were conducted on Gleeble-3500 thermo-mechanical simulator at temperature 350 °C and 450 °C, strain rate 0.1 s-1 and 1s−1. These tests simulated flat rolling to investigate how softening behaviors respond to controlled parameters, such as deformation temperature, strain rate and delay times. This data allowed the parameters for the hot rolling process to be optimized. The delay times during interrupted compression vary between 5s and 60s. The dynamic softening at each pass and metadynamic recrystallization at the intervals of deformation passes were analyzed in detail. 0.2% offset yield strength is applied to calculate the softening fraction undergoing metadynamic recrystallization. A kinetic model was developed to describe metadynamic recrystallization behaviors of the hot deformed 5754 aluminum alloy. Furthermore, the time constant for 50% recrystallization was expressed as functions related to the temperature and the strain rate. The experimental and calculated results were found to be in close agreement, which verified the developed model.
Keywords
5754 Aluminum alloy; Two-pass hot compression; Dynamic softening; Metadynamic recrystallization
Subject
Chemistry and Materials Science, Metals, Alloys and Metallurgy
Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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