Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7176544 | Journal of Materials Processing Technology | 2018 | 22 Pages |
Abstract
Interrupted tensile tests, performed between room temperature (RT) and 250 °C, were used to simulate warm forming of an AA3003/AA4045 brazing sheet. Brazing performance was predicted from sagging distance measurements after a thermal cycle. The sagging distance as a function of strain for sheets strained at 150 °C was similar to that of RT strained samples, while the sagging distances were larger at all levels of applied strain for sheets strained at 200 °C and 250 °C. Large sagging distances were correlated with the occurrence of liquid film migration during simulated brazing and a recovered substructure in the core alloy, while small sagging distances were associated with a coarse, recrystallized core alloy. The poor brazing performance of sheets formed above 150 °C was attributed to a reduction in the stored strain energy during forming, resulting in recovery rather than recrystallization during brazing, leaving a microstructure which is susceptible to liquid film migration.
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Engineering
Industrial and Manufacturing Engineering
Authors
M.J. Benoit, R. Kaur, M.A. Wells, H. Jin, B. Shalchi Amirkhiz, S. Winkler,