冷轧结合T6热处理对7075铝合金组织和性能的影响<sup>*</sup>

doi:10.11896/j.issn.1005-023X.2017.014.018

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Abstract In order to examine the combined effect of plastic deformation and the T6 treatment on Al-Zn-Mg-Cu alloys, a 7075 Al alloy was subjected to cold-rolling (CR) deformation and T6 heat-treatment (T6) in two different routes of CR+T6 (CR followed with T6) and T6+CR (T6 treatment followed with CR), respectively, and characterized by optical microscopy, transmission electron microscope, and mechanical tensile property measurement. The results show that the cold-rolling before T6 heat treatment has less influences on the tensile strength and elongation of the CR+T6 samples. While the yield strength and ultimate tensile strength of T6+CR samples are remarkably improved with increasing the deformation, and the T6+40% deformation (the optimized T6+CR) sample exhibits superior strength with adequate plasticity, with less energy consumption compared with the 60% deformation T6 sample (the optimized CR+T6). Microstructure investigation reveals that the grain-boundary strengthening and dislocation streng-thening are the primary reasons for the improved mechanical properties of CR+T6 and T6+CR samples.

Key words： aluminum alloy cold rolling aging microstructure mechanical property

Published: 04 May 2018

CLC number:

TG146.2

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	Articles by authors
	CUI Xinwei
	XU Xiaofeng
	NING Yuheng
	ZHAO Yuguang

Cite this article:

CUI Xinwei,XU Xiaofeng,NING Yuheng, et al. Microstructure and Mechanical Properties of 7075 Al Alloy Processed by Combined Cold-rolling and T6 Heat-treatment[J]. Materials Reports, 2017, 31(14): 88-91.

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http://www.mater-rep.com/EN/10.11896/j.issn.1005-023X.2017.014.018 OR http://www.mater-rep.com/EN/Y2017/V31/I14/88

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