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| Microstructure and performance of AZ4.51-Ca magnesium alloy sheets |
| Chen Hongmei;Suk-Bong Kang;Huashun Yu;Guanghui Min |
| 山东大学 |
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Cite this article:
Chen Hongmei; Suk-Bong Kang; Huashun Yu; Guanghui Min. Microstructure and performance of AZ4.51-Ca magnesium alloy sheets. Acta Metall Sin, 2008, 44(4): 397-402 .
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Abstract Magnesium sheets produced by different process were studied in this paper. The microstructure and mechanical properties of the alloys were analyzed by optical microscope (OM)、scanning electron microscope (SEM)、transmission electron microscope (TEM) 、digital microhardness tester and electron test equipment. The conventional casting ingot and twin rolling casting strip were all can be hot rolled at certain temperature and get magnesium sheets with 1mm thickness had refined and uniform deformation microstructure, the alloys were recrystallized after heat treatment and got equiaxed structure. The alloys had good mechanical properties after hot rolling, the strength and the elongation of twin roll casting alloy were evident higher than those of the conventional casting alloy. The tensile strength, yield strength and elongation of twin roll casting alloy and conventional casting alloy after hot rolling and 350℃×10min annealing were 334.4MPa, 229.3MPa, 23.8%, and 270.8MPa, 174.4MPa, 10.8%, respectively. The fracture surface of the alloys all took on ductile fracture contains lacerated ridge and ductile sockets, but the twin roll casting alloy had more evidence and smaller ductile sockets, this because the grain size of twin roll casting alloy was finer than that of conventioanal casting alloy.
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Received: 29 August 2007
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