Study on Constitutive Equation of 7085 Aluminum Alloy under High Deformation Temperature

Rui Bin Mei; Bo Zhang; B. Cai; X.Y. Zhang; Z.T. Zou; Y.N. Liu; C.S. Li

doi:10.4028/www.scientific.net/AMR.1095.579

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 1095Study on Constitutive Equation of 7085 Aluminum...

Study on Constitutive Equation of 7085 Aluminum Alloy under High Deformation Temperature

Abstract:

The flow stress behavior of the 7085 aluminum alloy was studied through single-pass compression experiment by using MMS-300 simulator within temperature range of 300-450°C and strain rate range of 0.01-10s^-1. Dynamic recrystallization occurs in hot compression of 7085 alloy and the stress-strain curves are presented as wave with higher deformation temperature and strain rate. Increasing of deformation velocity and reducing temperature results in higher peak stress. Then a mathematical model has been developed to predict the stress-strain curves based on phenomenological representation of the curves and the traditional theories for constitutive equations which incorporate the power law. The constitutive equation expressed in terms of peak stress, peak strain and additional parameters to predict flow stress. The stress-strain curves of 7085 alloy predicted by this model are in good agreement with experimental results.

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Advanced Materials Research (Volume 1095)

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579-582

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.1095.579

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Online since:

March 2015

Authors:

Rui Bin Mei*, Bo Zhang, B. Cai, X.Y. Zhang, Z.T. Zou, Y.N. Liu, C.S. Li

Keywords:

7085 Aluminum Alloy, Constitutive Equation, Dynamic Recrystallization, Hot Compression

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