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The Effects of Heat Straightening Temperature on the Microstructure and Properties of 7N01 Aluminum Alloy

1
School of Mechanical Engineering, North China University of Water Resources and Electric Power, Zhengzhou 450045, China
2
New Energy Materials and Technology Institute Ltd. of Dalian University of Technology, Qingdao 266200, China
3
School of Materials Science and Engineering, Dalian University of Technology, Dalian 116024, China
4
School of Electronic Engineering, Xidian University, Xi’an 710126, China
*
Author to whom correspondence should be addressed.
Materials 2019, 12(18), 2949; https://doi.org/10.3390/ma12182949
Received: 5 August 2019 / Revised: 9 September 2019 / Accepted: 10 September 2019 / Published: 11 September 2019
(This article belongs to the Section Corrosion and Materials Degradation)
The 7N01 aluminum alloys are always used in vehicles, but heat treatment can deteriorate mechanical properties and corrosion resistance, which limits its utilization. In this paper, the influences of the temperature of heat straightening on the corrosion behavior and mechanical properties of 7N01 aluminum alloy are investigated. Most of the initial Guinier Preston (GP) zones dissolve into the matrix during heat treatment process, while the grain boundary precipitates have no obvious change. The precipitates of the samples after heat treatment mainly consist of high density GP zones due to the natural aging effect, which result in the recovery of micro-hardness. Although heat treatment decreases the mechanical properties of 7N01 aluminum alloy, there is no obvious difference in mechanical properties of the specimens after different heat treatment conditions. The corrosion resistance of heat treatment samples decreases significantly compared with the base metal, which is attributed to enhancing the difference between the potential of the alloy matrix and the grain boundary. View Full-Text
Keywords: heat straightening; mechanical properties; corrosion behavior; natural aging heat straightening; mechanical properties; corrosion behavior; natural aging
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MDPI and ACS Style

Li, S.; Dong, H.; Shi, L.; Wang, X.; Liu, Z.; Shangguan, L.; Tian, Y. The Effects of Heat Straightening Temperature on the Microstructure and Properties of 7N01 Aluminum Alloy. Materials 2019, 12, 2949.

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