Abstract
Grain refinement is an important means to strengthen the properties of alloy. Here the Al-Zn-Mg-Cu alloy was processed by intermediate-temperature equal channel angular pressing (ECAP) to evaluate the grain refinement, mechanical properties and corrosion resistance of the alloy. Ultra-fine grained structure was obtained by 4 passes ECAP applied to Al-Zn-Mg-Cu alloy. With the increase of ECAP passes, some low angle grain boundaries (LAGBs) transform to high angle grain boundaries (HAGBs), forming micron-sized fine grains. Meanwhile, the strength, microhardness and corrosion resistance of the alloy were improved with the increase of extrusion passes. The pinning effect caused by dynamic precipitation and the mechanical fragmentation caused by ECAP refine the grains of the alloy. The microhardness and strength of the deformed alloy were improved under the combined action of fine grain strengthening, dislocation strengthening and second phase strengthening. A high density of dislocations, refined grains and secondary phases were produced by intermediate-temperature ECAP, which together improved the corrosion resistance of the alloy.
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.
