动态载荷下7005铝合金力学行为及数值模拟

doi:10.11896/cldb.201904020

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Abstract The flow stress behavior of 7005 aluminum alloy at strain rate ranging from (1—5)×10³ s^-1 was investigated. The results show that 7005 aluminum alloy is sensitive to strain rate. The parameters of Johnson-Cook equation were obtained thorough least square method. The ABAQUS was used to simulate the adiabatic shear of hat like specimen. The simulated stress-strain curves are in agreement with expe-riment results. The calculation of temperature field is a way to estimate the occurrence of recrystallization, when the strain rate is 15 000 s^-1, compared to the initial temperature, the average temperature rise of the sample is 405 ℃ in the range of 120—240 μs. A large number of equiaxed grains are detected by observing the microstructure of the deformed specimens, which is a typical character of recrystallization. The deformation tempe-rature rise and dynamic recrystallization softening behavior of 7005 aluminum alloy at high strain rate will provide important guidance for its application in automobile crash structural parts.

Key words： 7005 aluminum alloy strain rate sensitivity numerical simulation adiabatic shear

Published: 11 March 2019

CLC number:

TG146.2

Fund:This work was financially supported by the National Natural Science Foundation of China (51501061), the National Key Research and Development Progarm of China (2016YFB0101704)

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	Articles by authors
	XU Congchang
	YE Tuo
	TANG Ming
	GUO Pengcheng
	TANG Xu
	WU Yuanzhi
	LI Luoxing

Cite this article:

XU Congchang,YE Tuo,TANG Ming, et al. Mechanical Behavior and Numerical Simulation of 7005 Aluminum
Alloy Under Dynamic Impact[J]. Materials Reports, 2019, 33(4): 670-673.

URL:

http://www.mater-rep.com/EN/10.11896/cldb.201904020 OR http://www.mater-rep.com/EN/Y2019/V33/I4/670

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