In situ Study on the Growth Behavior of Primary Al3Ni Phase in Solidifying Al–Ni Alloy by Synchrotron Radiography
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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.
KeywordsSynchrotron radiography Directional solidification Intermetallic compounds Al–Ni alloy
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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