Abstract
Existing experimental results of weldability tests show the susceptibility of carbon steels to solidification cracking varies significantly with the C content. To analyze the effect of the C content on the susceptibility, equilibrium solidification of binary Fe-C alloys was assumed as an approximation in view of the rapid diffusion of the interstitial solute C in Fe. First, the curve of the equilibrium freezing temperature range vs. the C content was plotted and compared with the experimental results, but the agreement was not good. Then, the susceptibility index, i.e., |dT/d(fS)1/2| near (fS)1/2 = 1 (T: temperature; fS: fraction solid) recently proposed for Al alloys was tried. The curve of the susceptibility index vs. the C content was calculated. The curve agreed well with the experimental results of crack susceptibility tests of carbon steels in welding.
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Acknowledgments
Chunzhi Xia was supported by the Jiangsu Overseas Visiting Scholar Program for University Prominent Young and Middle-aged Teachers and Presidents as a Visiting Professor at the University of Wisconsin-Madison from 2018 to 2019. Sindo Kou was supported by the National Science Foundation initially under Grant No. DMR 1500367 and subsequently under Grant No. DMR1904503.
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Manuscript submitted August 17, 2020, Accepted October 25, 2020.
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Xia, C., Kou, S. Calculating the Susceptibility of Carbon Steels to Solidification Cracking During Welding. Metall Mater Trans B 52, 460–469 (2021). https://doi.org/10.1007/s11663-020-02021-5
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DOI: https://doi.org/10.1007/s11663-020-02021-5