Abstract
The containerless rapid solidification of liquid Al–15%Cu–55%Sn immiscible alloy is accomplished by single-axis ultrasonic levitation. A maximum undercooling of 209K (0.23TL) is obtained for the alloy melt at a cooling rate of about 100K/s. The phase separation pattern transforms from the vertical-type macrosegregation under normal condition into the lateral-type macrosegregation under ultrasonic levitation. The enhancement of both undercooling and cooling rate induces the refinement of microstructure and the remarkable extension of solute solubility in (Sn) phase. Theoretical analyses show that the morphology transition mainly depends on the density and surface tension differences between Al-rich and Sn-rich liquid phases. The centrifugal migration of Sn-rich droplets caused by sample rotation is the major dynamic mechanism responsible for the macrosegregation evolution under ultrasonic levitation condition.
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.
