应变速率对7065铝合金等温压缩软化机制的影响

doi:10.11896/cldb.22080187

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Abstract The effect of strain rate on the hot deformation behavior of 7065 aluminum alloy was investigated by isothermal compression experiments and electron backscatter diffraction. The results show that as the strain rate increases from 0.001 s^-1 to 30 s^-1, the dynamic recrystallization area fraction of the alloy first decreases significantly, reaching a lower level at 1 s^-1, and then the change is less than 10%, and the substructure area fraction increases significantly when the strain rate is greater than 1 s^-1. The softening mechanisms in the low strain rate range (0.001—1 s^-1) are dynamic recrystallization (DRX) mechanism and dynamic recovery (DRV) mechanism, while the softening mechanism in the high strain rate range (1—30 s^-1) is DRV. With the increase of strain rate, the deformation stored energy of alloy after isothermal compression deformation gra-dually increases.

Key words： Al-Zn-Mg-Cu alloy isothermal compression hot deformation constitutive equation dynamic recrystallization(DRX) dynamic recovery(DRV)

Published: 25 April 2024 Online: 2024-04-28

CLC number:

TG146.2

Fund:High Toughness and High Corrosion Resistance Aluminum Alloy Thick Plate Preparation Technology and Application Research (GuikeAA22067075).

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	ZHAO Yan
	TANG Jianguo
	ZHANG Yong
	ZHENG Xu
	ZHAO Hui

Cite this article:

ZHAO Yan,TANG Jianguo,ZHANG Yong, et al. Effect of Strain Rate on Isothermal Compression Softening Mechanism of 7065 Aluminum Alloy[J]. Materials Reports, 2024, 38(8): 22080187-6.

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https://www.mater-rep.com/EN/10.11896/cldb.22080187 OR https://www.mater-rep.com/EN/Y2024/V38/I8/22080187

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