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Metals 2016, 6(3), 49; doi:10.3390/met6030049

The Hot Deformation Activation Energy of 7050 Aluminum Alloy under Three Different Deformation Modes

1,2
,
1,2,* and 1,2
1
State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004, China
2
College of Materials Science and Engineering, Yanshan University, Qinhuangdao 066004, China
*
Author to whom correspondence should be addressed.
Academic Editor: Nong Gao
Received: 21 January 2016 / Accepted: 23 February 2016 / Published: 29 February 2016
(This article belongs to the Special Issue Aluminum Alloys)
View Full-Text   |   Download PDF [1123 KB, uploaded 15 March 2016]   |  

Abstract

In this study, the hot deformation activation energy values of 7050-T7451 aluminum alloy, calculated with two different methods under three deformation modes, were compared. The results showed that the hot deformation activation energy values obtained with the classical constitutive equation are nearly equivalent under the hot tensile, compression, and shear-compression deformation modes. Average values exhibited an obvious increase when calculated with the modified constitutive equation because it can reflect the variation of activation energy with deformation conditions such as deformation temperature, strain rate and strain state. Moreover, the values under tensile and compression deformation modes were nearly the same regardless of the calculation method. The higher average value under the shear-compression deformation mode with modified equation indicates that the strain state has a significant effect on the hot deformation activation energy. In addition, when the activation energy was investigated for various deformation conditions, the effect of the strain state on the activation energy was more significant. Under a certain condition, the activation energy was the same for the three deformation modes. View Full-Text
Keywords: activation energy; hot deformation; aluminum alloy; deformation mode activation energy; hot deformation; aluminum alloy; deformation mode
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. (CC BY 4.0).

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Sang, D.; Fu, R.; Li, Y. The Hot Deformation Activation Energy of 7050 Aluminum Alloy under Three Different Deformation Modes. Metals 2016, 6, 49.

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