| Summary: | Zinc-Aluminum (ZA) alloys are castable and can be manufactured using a variety of processes including pressure and reocasting. Their good performance, versatility and low cost have converted these alloys in an attractive alternative for noble applications. ZA alloys such as ZA-8, ZA-12 and ZA-27 were developed for casting prototype parts. Particularly, the ZA-27 alloy is known for its high strength/density ratio. In the present work, Zn-27% Al (ZA-27) alloys were directionally solidified with additions of Si, Cu and reinforcements of SiC particles. Microhardness tests and studies of quantitative metallography were carried out. The analyses of distribution of the different elements and silicon precipitates in different areas of the samples were carried out using Scanning Electron Microscopy and Energy Dispersive X-Ray Analysis. Correlations among composition, structure and microhardness
of the alloys were determined.
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Study of the hydrogen effect on microhardness of steels