Abstract
In order to improve the intergranular corrosion (IGC) resistance of Al–Mg–Si–Cu alloys without strength loss compared to that of the T6 temper, a new two-step aging treatment has been developed in the present study. The two-step aging treatment includes pre-aging at a relatively higher temperature for a shorter time and then re-aging at a lower temperature for a relatively longer time. The microstructural observation shows that after the optimized two-step aging of 180°C/2h+160°C/120h, the microstructural characteristics of the alloy combines the matrix of high number density β″ precipitates and grain boundaries of discretely distributed GBPs. The type of microstructures is responsible for the improvement of IGC resistance of the alloy without strength loss.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
