| 4 | Anisotropic Inter-granular Corrosion Behaviors and Microstructures of AlMgSiCu Alloy Sheets Made by Thermal–Mechanical Treatments显示文摘This study investigates the microstructure and local corrosion behavior of an Al-Mg-Si-Cu alloy,which has been subjected to cold-rolling with different deformation strain ratios(DSRs)and followed by artificial aging.Accelerated corrosion tests show that peak-aged samples with a small DSR(5-10%)are sensitive to inter-granular corrosion(IGC)along both the normal and rolling directions.When the DSR increases to medium strength(20-40%),IGC sensitivity decreases along both directions and corrosion propagates anisotropically.When the DSR is 60-80%,IGC sensitivity along the normal direction continues to decrease,but increases along the rolling direction,indicating pronounced corrosion anisotropy.Microstructural characterization reveals the decreased IGC sensitivity is mainly attributed to a reduction in element segregation at high-angle grain boundaries and the kinked and discontinuous grain boundary corrosion paths.The increased IGC sensitivity along the rolling direction could be related to the significantly flattened grains. | L.M.Liu Y.X.Lai C.L.Wu Z.Zhang J.H.Chen | 2022 | Acta Metallurgica Sinica(English Letters)2022，35，2： | 0 |
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