Achieving ultra-fine grains and high corrosion resistance of Al–Zn–Mg–Cu alloy by ECAP and post cold rolling

• DOI: 10.1016/j.jmrt.2023.09.070
• Publication Date: 2023-09-12T13:33:10Z
• Authors: Guisheng Li; Xinyuan Pan; Jin Jiang; Jinghui Li; Lingling Xie; Haitao Liu; Mingya Zhang
• Keywords: Corrosion behavior; Mining engineering. Metallurgy; Al–Zn–Mg–Cu alloy; TN1-997; Second phases; Cold rolling; 02 engineering and technology; 0210 nano-technology; Grain refinement

The ultra-fine grain structure of Al–Zn–Mg–Cu alloy was prepared by equal channel angular pressing (ECAP) and post cold rolling (CR) combined deformation process. effect different on the microstructure, microhardness corrosion behavior ECAP were studied. results show that with increase deformation, dislocation density increased, second phases deformed obviously refined. Grain refinement mainly due to gradual transformation some subgrain boundaries low angle (LAGBs) alloys into high (HAGBs), which eventually form fine grains. improvement attributed strengthening, strengthening phase strengthening. Simultaneously, tested immersion intergranular corrosion, revealed high-density lattice defects, refined second-phase particles can improve resistance alloys.