Abstract
Undercooled dendritic growth of bulk Ni–25 wt%Pb alloy was investigated. When the alloy was undercooled less than 50 K, the solidification microstructures were composed of common dendrites and interdendritic lead phase. When the undercooling was up to 77 K, rapidly directional “pseudo-couple” microstructure formed. With the undercooling increasing into the range of 132–240 K, uniformly precipitated fine lead particles resulted from primary supersaturated dendrites were observed. When the alloy was undercooled up to 308 K, refined granular grains with homogeneously distributed fine lead particles on it formed. By calculating the thermodynamic parameters based on the BCT model, it was found that the formation of “pseudo-couple” microstructure was owing to the directional growth of primary dendrites.
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.
