Hot Tearing Susceptibility (HTS) of aluminum alloys was investigated using a constrained rod hot tearing test apparatus. The test apparatus and procedure were validated using Al-Cu alloy. Subsequently, the test was used to characterize new structural Al-Zn alloys being developed for high pressure die casting application. The behavior was compared with that of Al-Si-Mg alloys. It was found that introducing small amounts of Fe that promotes evolution of eutectic phases could alleviate the hot tearing problem of Al-Zn alloys. In this publication, the details of the investigation are present and discussed.
Kumar Sadayappan, Canmet Materials
Sumanth Shankar, McMaster University
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