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Quenching Sensitivity of Al-Zn-Mg Alloy after Non-Isothermal Heat Treatment

School of Mechanical Engineering, North China University of Water Resources and Electric Power, Zhengzhou 450045, China
School of Materials Science and Engineering, Dalian University of Technology, Dalian 116024, China
Author to whom correspondence should be addressed.
Materials 2019, 12(10), 1595;
Received: 11 April 2019 / Revised: 13 May 2019 / Accepted: 13 May 2019 / Published: 15 May 2019
PDF [6867 KB, uploaded 15 May 2019]


Type Al-Zn-Mg alloy has a wide ranges of application in vehicles, but corrosion resistance and mechanical properties of this alloy after heat treatment or heat straightening limits its utilization. This paper investigates the effect of quenching condition during non-isothermal heat treatment on corrosion behavior and mechanical properties of Al-Zn-Mg alloy. The corrosion resistance of Al-Zn-Mg alloy decreases after non-isothermal heat treatment and the sample after air quenching has the lowest corrosion resistance, the specimens can get better corrosion resistance when suffered 5 min air cooling followed by water quenching process. The evolution of mechanical properties and corrosion resistance of heat-treated specimens is caused by the modification of distribution of precipitates at grain boundary and the microchemistry of precipitates at grain boundary, precipitate-free zones and the matrix. View Full-Text
Keywords: non-isothermal heat treatment; quenching sensitivity; corrosion susceptibility non-isothermal heat treatment; quenching sensitivity; corrosion susceptibility

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Li, S.; Dong, H.; Wang, X.; Liu, Z. Quenching Sensitivity of Al-Zn-Mg Alloy after Non-Isothermal Heat Treatment. Materials 2019, 12, 1595.

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