Al-Cu-Mg-Mn-Sc-Zr铝合金的流变行为与热加工图

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Abstract The hot deformation behavior of Al-Cu-Mg-Mn-Sc-Zr aluminium alloy is a basis for formulating deformation processing technology. The isothermal compression simulation experiment was carried out on the homogenized Al-Cu-Mg-Mn-Sc-Zr aluminium alloy by Gleeble-3500 system under temperature of 633-753 K and strain rate of 0.01-10 s^-1, the true strain-true stress curves were obtained, and deformation activation energy was calculated, and processing map was built-up. The results show that flow stress decreases and the softening mechanism changes from dynamic recovery to dynamic recrystallization with the increase of deformation temperature or the decrease of strain rate. The precipitates in the deformed alloy pin dislocation slip and grain boundary migration, and hinder recrystallization. The activation energy is 153.5 kJ/mol. 633-663 K, 0.01-0.07 s^-1 and 693-723 K, 0.01-0.1 s^-1 are the best deformation regions.

Key words： Al-Cu-Mg-Mn-Sc-Zr aluminium alloy flow stress constitutive equation activation energy processing map

Received: 19 March 2021 Published: 26 September 2021

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TG146.2

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	ZHOU Xu
	LIU Zuming
	HUANG Lanping
	AI Yongkang
	CAO Bin
	YE Shupeng

Cite this article:

ZHOU Xu,LIU Zuming,HUANG Lanping, et al. Hot deformation behavior and processing map of Al-Cu-Mg-Mn-Sc-Zr aluminium alloy[J]. Materials Science and Engineering of Powder Metallurgy, 2021, 26(4): 372-380.

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http://pmbjb.csu.edu.cn/EN/ OR http://pmbjb.csu.edu.cn/EN/Y2021/V26/I4/372

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