7050铝合金热变形行为和组织演变研究

doi:10.11896/cldb.25050017

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Abstract Isothermal hot compression tests were conducted on 7050 aluminum alloy ingots and extruded sheets in the extrusion direction (ED), transverse direction (TD), and normal direction (ND) at 420 ℃ to explore the influence of strain rate and deformation on the flow stress of the material. The microstructure evolution of the specimens under different compression conditions was analyzed by optical microscope, scanning electron microscope and electron backscatter diffraction (EBSD). The results show that when the temperature and deformation remain constant and the strain rate increases, the flow stress increases significantly. When the deformation exceeds 0.05, the flow stress of the material remains almost unchanged with the increase of the deformation. During the thermal compression process, the deformation degree of the material along the ND is significantly greater than that along the ED and TD. The Schmid factors of the deformation of the 7050 extruded sheet along the ED, TD and ND are 0.408, 0.428, and 0.465, respectively. When the strain rate remains constant, the recrystallization fraction increases with the increase of the deformation amount. When the deformation remains constant, the dislocation density increases with the increase of the strain rate, while the recrystallization fraction decreases; dynamic recrystallization during the thermal compression process mainly occurs near grain boundaries. The main textures of the 7050 extruded sheet are S texture, Brass texture and Copper texture. When compressed along the ND, the S texture gradually transforms into the Brass texture.

Key words： 7050 aluminum alloy hot compression deformation behavior microstructure evolution

Published: 25 July 2026 Online: 2026-08-12

CLC number:

TG146.21

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	Articles by authors
	WANG Haojun
	HU Shengshuang
	SUN Youzheng
	CAO Shanpeng
	YOU Qifan
	NIU Pengliang
	HE Wenbin
	ZHANG Bingxian

Cite this article:

WANG Haojun,HU Shengshuang,SUN Youzheng, et al. Investigation on Hot Deformation Behavior and Microstructure Evolution of 7050 Aluminum Alloy[J]. Materials Reports, 2026, 40(14): 25050017-9.

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https://www.mater-rep.com/EN/10.11896/cldb.25050017 OR https://www.mater-rep.com/EN/Y2026/V40/I14/25050017

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