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

作者：Kowalski Aleksander^*; Ozgowicz Wojciech; Jurczak Wojciech; Grajcar Adam; Boczkal Sonia; Zelechowski Janusz

来源：Materials, 2018, 11(4): 570.

DOI：10.3390/ma11040570

• aluminium alloy
• 7003 alloy
• corrosion resistance
• thermomechanical treatment
• TEM
• X-ray diffraction

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 P-SCC indices.

• 出版日期2018-4
• 单位中国人民解放军海军大连舰艇学院