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Open AccessArticle

Microstructure, Mechanical Properties, and Corrosion Resistance of Thermomechanically Processed AlZn6Mg0.8Zr Alloy

1
Institute of Non-Ferrous Metals, 5 Sowińskiego Street, 44-100 Gliwice, Poland
2
Silesian University of Technology, Institute of Engineering Materials and Biomaterials, 18A Konarskiego Street, 44-100 Gliwice, Poland
3
Polish Naval Academy, Faculty of Mechanical and Electrical Engineering, 69 Śmidowicza Street, 81-127 Gdynia, Poland
4
Institute of Non-Ferrous Metals, Light Metals Division, 19 Piłsudskiego Street, 32-050 Skawina, Poland
*
Author to whom correspondence should be addressed.
Materials 2018, 11(4), 570; https://doi.org/10.3390/ma11040570
Received: 7 March 2018 / Revised: 3 April 2018 / Accepted: 4 April 2018 / Published: 7 April 2018
(This article belongs to the Special Issue Thermo-Mechanical Behaviour of Structural Lightweight Alloys)
The paper presents results of the investigations on the effect of low-temperature thermomechanical treatment (LTTT) on the microstructure of AlZn6Mg0.8Zr alloy (7000 series) and its mechanical properties as well as electrochemical and stress corrosion resistance. For comparison of the LTTT effect, the alloy was subjected to conventional precipitation hardening. Comparative studies were conducted in the fields of metallographic examinations and static tensile tests. It was found that mechanical properties after the LTTT were better in comparison to after conventional heat treatment (CHT). The tested alloy after low-temperature thermomechanical treatment with increasing plastic deformation shows decreased electrochemical corrosion resistance during potentiodynamic tests. The alloy after low-temperature thermomechanical treatment with deformation degree in the range of 10 to 30% is characterized by a high resistance to stress corrosion specified by the level of PSCC indices. View Full-Text
Keywords: aluminium alloy; 7003 alloy; corrosion resistance; thermomechanical treatment; TEM; X-ray diffraction aluminium alloy; 7003 alloy; corrosion resistance; thermomechanical treatment; TEM; X-ray diffraction
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Kowalski, A.; Ozgowicz, W.; Jurczak, W.; Grajcar, A.; Boczkal, S.; Żelechowski, J. Microstructure, Mechanical Properties, and Corrosion Resistance of Thermomechanically Processed AlZn6Mg0.8Zr Alloy. Materials 2018, 11, 570.

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