Abstract
Mathematical model is formulated for description of thermophysical processes at laser welding of metal plates for the case when modifying nanoparticles of refractory compounds (nanopowder inoculators – NPI) are introduced into the weld pool. Specially prepared nanoparticles of refractory compounds serve here as crystallization centers, i.e. in fact they are exogenous inoculants on which surface clusters are grouped. This can be used to control the melt crystallization process and formation of its structure, and, therefore, properties of the weld seam. As an example, calculation results of the butt welding of aluminum alloy and steel plates are presented. The results of calculation and experimental data comparison are shown.
Highlights
IntroductionIn the last years increasing attention has been paid to development of technology for laser welding of metal products
Mathematical model is formulated for description of thermophysical processes at laser welding of metal plates for the case when modifying nanoparticles of refractory compounds are introduced into the weld pool
In the last years increasing attention has been paid to development of technology for laser welding of metal products
Summary
In the last years increasing attention has been paid to development of technology for laser welding of metal products. In this connection, development of appropriate mathematical models and numerical algorithms for their implementation is a pressing problem [1,2]. A mathematical model is developed in this work for description of thermophysical processes at laser welding of metal plates for the case when modifying nanoparticles of refractory compounds (nitrides, oxides, etc) are introduced in the molten pool. The mathematical model proposed is based on non-equilibrium birth and growth of crystal phase on the inoculants, which are the nanoparticles, with use of the Kolmogorov’s theory for calculation of the solid phase fraction.
Sign-in/Register to view highlights & summary 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.
