Inhomogeneous Microstructure Distribution and Its Formation Mechanism in Deep Penetration Laser Welding of Medium-Thick Aluminum-Lithium Alloy Plates
OPTICS AND LASER TECHNOLOGY（2023）
Abstract
•The microstructure distribution in deep penetration laser welding (DPLW) of Al-Li alloy is seriously inhomogeneous along the depth direction.•A multi-scale simulation was used to investigate the formation mechanism of inhomogeneous microstructure distribution.•Macro-scale fluid flow and micro-scale nuclei density play critical roles in microstructure evolution during DPLW of Al-Li alloy.
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Key words
Al-Li alloy,Microstructure distribution,High power laser welding,Macro-scale thermal-mass transport,Micro-scale microstructure evolution
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