Abstract
The growth behavior of Al3Ni intermetallic compounds (IMCs) during the directional solidification of Al-10 wt% Ni alloy was investigated by synchrotron radiography. Two main growth patterns of primary Al3Ni phase, I-like and V-like, appeared during solidification, and I-like Al3Ni phase grew faster than V-like phase, which can be explained by the minimum energy criterion. The growth of I-like phase can be divided into two stages and was mainly affected by undercooling and Ni concentration. We also found that V-like Al3Ni phase can evolve into M-like phase during solidification.
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Acknowledgements
This work was supported by the National Natural Science Foundation of China (No. 51374144), Shanghai Municipal Natural Science Foundation (No. 13ZR1420600), Shanghai Rising-Star Program (No. 14QA1402300). The support of the BL13W1 beam line of Shanghai Synchrotron Radiation Facility (SSRF) is gratefully acknowledged.
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Sun, SY., Hu, QD., Lu, WQ. et al. In situ Study on the Growth Behavior of Primary Al3Ni Phase in Solidifying Al–Ni Alloy by Synchrotron Radiography. Acta Metall. Sin. (Engl. Lett.) 31, 668–672 (2018). https://doi.org/10.1007/s40195-017-0684-2
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DOI: https://doi.org/10.1007/s40195-017-0684-2