Abstract
Effect of microstructural evolution on sagging behavior of aluminum foil was investigated during the brazing thermal cycle. During the brazing thermal cycle, the sagging behavior consists of three stages: slight sagging stage, accelerative sagging stage and slow sagging stage. The sagging of cold-rolled aluminum foil mainly occurs in the accelerative sagging stage, which is governed by recovery under external stress in the sagging test. The coarse recrystallized grain is responsible for the slow sagging stage by reducing grain boundary sliding. Increasing cold-rolled reduction and addition of final annealing heat treatment can improve sagging resistance by shortening recovery process during the brazing thermal cycle. Dissolution of dispersoids has few effects on sagging deformation.
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The authors would like to thank the support from Jiangsu Key Laboratory for Clad Materials (No. BM2014006), Program on Jiangsu Science and Technology Achievements Transformation (No. BA2015079), International Science & Technology Cooperation Program of Wuxi City (No. CZE02H1504), and Key Countries and Institutions of Industrial Technology Cooperation Projects (No. BZ2016004).
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Liu, C., Xue, X., Chen, X. et al. Effect of Microstructural Evolution on Sagging Behavior of Cold-Rolled Aluminum Foil During the Brazing Thermal Cycle. J. of Materi Eng and Perform 26, 5563–5570 (2017). https://doi.org/10.1007/s11665-017-2782-8
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DOI: https://doi.org/10.1007/s11665-017-2782-8