Effect of melt superheating treatment on the cast microstructure of Mg–1.5Si–1Zn alloy

The effect of melt superheating treatment on the microstructure of Mg–1.5Si–1Zn alloy is investigated in this article. The microstructure of samples poured into sand and metal molds shows that the primary Mg₂Si is considerably refined in size when the melt is superheated from 750 to 900 °C. However,...

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Veröffentlicht in:	Journal of materials science 2008-02, Vol.43 (3), p.980-984
Hauptverfasser:	Gu, Z. H, Wang, H. Y, Zheng, N, Zha, M, Jiang, L. L, Wang, W, Jiang, Q. C
Format:	Artikel
Sprache:	eng
Schlagworte:	alloys Characterization and Evaluation of Materials Chemistry and Materials Science Classical Mechanics Cross-disciplinary physics: materials science rheology Crystallography and Scattering Methods Exact sciences and technology Grain refinement Heredity Intermetallic compounds Intermetallics magnesium Magnesium base alloys Magnesium compounds Materials Science melting Melts Metal silicides Microstructure Morphology Other topics in materials science Physics Polymer Sciences Sand Semiconductors Silicides silicon Solid Mechanics Superheating zinc
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Zusammenfassung:	The effect of melt superheating treatment on the microstructure of Mg–1.5Si–1Zn alloy is investigated in this article. The microstructure of samples poured into sand and metal molds shows that the primary Mg₂Si is considerably refined in size when the melt is superheated from 750 to 900 °C. However, its polyhedral morphology does not change. In addition, also the size of eutectic Mg₂Si phase obviously decreases, but the morphology still exhibits Chinese script type. Meanwhile, it is concluded that the reduction of the heredity plays an important role in the grain refinement of Mg–1.5Si–1Zn alloy.
ISSN:	0022-2461 1573-4803
DOI:	10.1007/s10853-007-2275-5