轧制态7A60铝合金的热压缩显微组织及流变行为

doi:10.11896/j.issn.1005-023X.2018.08.019

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Abstract The microstructral characteristics and flow behaviors of rolled 7A60 aluminum alloy experienced hot compression were investigated within a stress rate range of 0.1—0.01 s^-1 and a temperature range of 250—350 ℃.The results confirmed the wea-kened anisotropy, the enhanced uniformity, and the obviously coarsened grain for the material with the decrease in strain rate and the increase in temperature. In the process of thermal deformation, the main softening mechanism is dynamic recovery and dynamic recrystallization. The peak stress increases with the increase of strain rate and decreases with the increase of temperature. And at the strain rate of 0.01 s^-1, a significant discontinuous dynamic recrystallization behavior occurred. The rheological behavior of the alloy can be characterized by a hyperbolic sine function with a thermal activation energy of 438.981 kJ/mol.

Key words： 7A60 aluminum alloy hot compression microstructure flow stress constitutive equation

Published: 25 April 2018 Online: 2018-05-11

CLC number:

TG376

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	XUE Kemin
	BO Dongqing
	LI Ping

Cite this article:

XUE Kemin,BO Dongqing,LI Ping. Hot Compression Microstructure and Rheological Behavior of Rolled 7A60 Aluminum Alloy[J]. Materials Reports, 2018, 32(8): 1306-1310.

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https://www.mater-rep.com/EN/10.11896/j.issn.1005-023X.2018.08.019 OR https://www.mater-rep.com/EN/Y2018/V32/I8/1306

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