Abstract
Mg-Al-Zn alloy thin strips were prepared by vertical twin-roll casting. Effects of Al and Ca on the microstructure and the surface defects of the thin strips were investigated. The results show that with the increase of Al content, the quantity of surface cracks of the thin strips increases rapidly and their locations are moved to the center of the thin strips. The alloy melts with more than 0.10% Ca (mass fraction) stick on the roller and a poor surface quality of the thin strips appears. With the increase of Al content, the microstructure of the thin strips evolves from single α-Mg phase, characterized by the uniform and equiaxed recrystallization grains, to the combination of dendritic α-Mg with Al supersaturated α-Mg. The minor addition of Ca can obviously refine the grains of Mg-3Al-1Zn thin strip because the formation of Al 2Ca and the finest grains are obtained by adding 0.08% Ca.
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 callMore From: Transactions of Nonferrous Metals Society of China
Disclaimer: 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.
