Microstructure and mechanical properties of MEZ casting alloy
- 31 December 2002
- journal article
- conference paper
- Published by Trans Tech Publications, Ltd. in Materials Science Forum
- Vol. 419-4, 273-277
- https://doi.org/10.4028/www.scientific.net/MSF.419-422.273
Abstract
The as-cast and the heat treated microstructures of MEZ casting alloy are characterized in detail, revealing the presence of intermetallic particles at grain boundaries and fine-scale precipitates in the matrix. The alloy showed a small age hardening response after a T6 heat treatment (1000 min. at 498 K), leading to a 23% increase in proof strength. A T5 heat treatment (360 min. at 488 K) showed no appreciable age hardening response, but resulted in a 15% increase in proof strength. This apparent anomaly is discussed, comparing macro-indentation and nanoindentation hardness test results.Keywords
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