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CALPHAD-coupled finite element modeling of the liquation cracking in dissimilar AZ31/ZK61 resistance spot weld

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Abstract

A CALPHAD-coupled finite element model of dissimilar AZ31/ZK61 resistance spot welding was established in this work. The coupled effect of phase transformation and heat transfer was considered in this model, which presents the solid fraction contour evolution within the joint. During the cooling stage of AZ31/ZK61 resistance spot welding, a low-solid-fraction layer appears within the partially melted zone of the joint. The continuous liquation crack in the AZ31/ZK61 resistance spot weld exhibits a pattern similar to the low-solid-fraction layer plotted by the CALPHAD-coupled finite element model. In the case of AZ31/ZK61 resistance spot welding with a Zn interlayer, no low-solid-fraction layer appears. Due to the consideration of the coupled effects of phase transformation and heat transfer, the CALPHAD-coupled finite element model possesses the capability to analyze the liquation cracking susceptibility of ZK series magnesium alloy, which exhibits significant eutectic reactions during non-equilibrium solidification.

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Funding

This research was supported by the Beijing Science and Technology Plan Project (No. KM202010017004), the National Natural Science Foundation of China (Grant No. 52275300), the Award Cultication Foundation form Beijing Institute of Petrochemical Technology (Project No. BIPTACF-009), the Cross Scientific Research Exploration Project of Beijing Institute of Petrochemical Technology (No BIPTCFS-013), and the State key Laboratory of Advanced Welding and Joining from Harbin Institute of Technology (Project No AWJ-23M08).

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All authors contributed to the study conception and design. Material preparation, data collection, and analysis were performed by Hua Han and Zuyu Zhou. The first draft of the manuscript was written by Feng Han and Yu Zhang. All authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.

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Correspondence to Caimei Wang or Yu Zhang.

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Han, F., Han, H., Zhou, Z. et al. CALPHAD-coupled finite element modeling of the liquation cracking in dissimilar AZ31/ZK61 resistance spot weld. Int J Adv Manuf Technol 129, 513–523 (2023). https://doi.org/10.1007/s00170-023-12320-1

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