Abstract
The phase composition of the Al-Ni-Mn-Fe-Si-Zr system was analyzed with respect to new-generation heat resistant casting aluminum alloys based on a Ni-containing eutectic. The presence of iron and silicon significantly complicates the phase composition as compared with quaternary (Al-Ni-Mn-Zr) alloys. The admissible concentration of iron, at which no primary aluminides form and a high dispersivity of the eutectic is provided for, went up (to approximately 0.5–0.7%) as the concentration of nickel was decreased from 4 to 2%. Herewith, the solidification range did not exceed 10°C, which enabled higher casting properties. Silicon strongly expands the solidification range (being ~60°C already at 0.1%), which increases the aptitude of the alloy to form hot cracks in castings.
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Belov, N.A., Alabin, A.N. (2012). Assestment of the Al-Ni-Mn-Fe-Si-Zr Phase Diagram for New Generation Heat Resistant Casting Aluminum Alloys. In: Weiland, H., Rollett, A.D., Cassada, W.A. (eds) ICAA13 Pittsburgh. Springer, Cham. https://doi.org/10.1007/978-3-319-48761-8_19
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DOI: https://doi.org/10.1007/978-3-319-48761-8_19
Publisher Name: Springer, Cham
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