2060-T8E30铝锂合金的高温拉伸变形行为及显微组织研究

doi:10.11896/cldb.21090209

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Abstract The effect of deformation temperature and strain rate on the microstructure and hot deformation behavior of 2060-T8E30 Al-Li alloy was stu-died by Sans CMT4104 tensile testing machine, optical microscopy(OM) and scanning electron microscope(SEM). The true stress-strain curves of the alloy under different thermal deformation conditions were analyzed, and the thermal deformation parameters of the alloy were obtained by combining the Zener-Hollomon equation. By observing the second phase, cavity and fracture morphology, the microstructure evolution of the alloy under hot stretching was studied. The results show that the peak stress of the alloy decreases with the increase of deformation temperature and the decrease of strain rate. The elongation of the alloy increases with the increase of deformation temperature and then decreases with the decrease of strain rate. The elongation reaches 170% at 500 ℃/0.01 s^-1. The deformation activation energy of the alloy is 227.28 kJ/mol. The microstructure shows that the number and size of cavities increase with the increase of deformation temperature and the decrease of strain rate. When the deformation temperature is 475—500 ℃, the second phase is precipitated and the geometric dynamic recrystallization occurs.

Key words： 2060-T8E30 Al-Li alloy hot deformation behavior dynamic recrystallization microstructure

Published: 25 March 2023 Online: 2023-03-27

CLC number:

TG146.21

Fund:Aeronautical Science Foundation (2019ZE056009), the Key Research and Development Program of Jiangxi Pro-vince (20202BBEL53012), and the Foundation of National Defense Key Discipline Laboratory of Light Alloy Processing Science and Technology (EG201903175).

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	Articles by authors
	YU Yibiao
	CHEN Leping
	XU Yong
	YUAN Yuanping
	FANG Senpeng

Cite this article:

YU Yibiao,CHEN Leping,XU Yong, et al. High Temperature Tensile Deformation Behavior and Microstructure of 2060-T8E30 Al-Li Alloy[J]. Materials Reports, 2023, 37(6): 21090209-6.

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http://www.mater-rep.com/EN/10.11896/cldb.21090209 OR http://www.mater-rep.com/EN/Y2023/V37/I6/21090209

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