Abstract
Dissimilar-filler welding is widely used for joining aluminum components. However, macrosegregation that will degrade the performance of the weld joint commonly occurs within the weld metal, because of the compositional difference between the filler and base metals. This study reports a new mechanism for the macrosegregation introduction during dissimilar-filler welding. Liquid segregation is induced in the weld pool owing to dynamic heterogeneous mixing between the filler and the base metal melts. In the front portion of the weld pool, heterogeneous mixing proceeds uninhibited owing to convection and the presence of a continuous heat source. However, away from this region, the temperature of the weld pool is significantly reduced, and solidification dominates heterogeneous mixing. If the heterogeneous mixing has none or only partially occurred, this liquid segregation is frozen into the weld metal to introduce macrosegregation. The mechanism elucidation will provide new insights into the improvement of weld joints.
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.
