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Microstructure and mechanical properties of rheo-squeeze casting AZ91-Ca magnesium alloy prepared by gas bubbling process
Highlights Increase of gas flow led to improvement of the quality of AZX912 semi-solid slurry. Increase of gas flow improved ductility of rheo-squeeze casting AZX912 alloy. Increase of applied pressure led to refinement in as-cast microstructure. Increase of applied pressure improved both tensile strength and ductility. Heat treatment brought microstructure modification and increase of ductility.
Abstract Rheo-squeeze casting combined with gas bubbling process was proved effective to improve the mechanical properties of AZ91-2wt%Ca (AZX912) alloy. Increase of gas flow led to improvement of the quality of AZX912 semi-solid slurry and improved ductility of rheo-squeeze casting AZX912 alloy samples. Increase of applied pressure brought refinement in as-cast microstructure and reduction of porosity, as well as continuous improvement in both tensile strength and elongation. Heat treatment at 410°C promoted dissolution of β-Mg17Al12 phase, morphology modification of Al2Ca phase and further increase of both tensile strength and ductility. Compared with conventional squeeze casting, the mechanical properties of rheo-squeeze casting AZX912 alloy were improved by more than 20%. The improvement in mechanical properties was mainly attributed to the grain refinement in microstructure.
Microstructure and mechanical properties of rheo-squeeze casting AZ91-Ca magnesium alloy prepared by gas bubbling process
Highlights Increase of gas flow led to improvement of the quality of AZX912 semi-solid slurry. Increase of gas flow improved ductility of rheo-squeeze casting AZX912 alloy. Increase of applied pressure led to refinement in as-cast microstructure. Increase of applied pressure improved both tensile strength and ductility. Heat treatment brought microstructure modification and increase of ductility.
Abstract Rheo-squeeze casting combined with gas bubbling process was proved effective to improve the mechanical properties of AZ91-2wt%Ca (AZX912) alloy. Increase of gas flow led to improvement of the quality of AZX912 semi-solid slurry and improved ductility of rheo-squeeze casting AZX912 alloy samples. Increase of applied pressure brought refinement in as-cast microstructure and reduction of porosity, as well as continuous improvement in both tensile strength and elongation. Heat treatment at 410°C promoted dissolution of β-Mg17Al12 phase, morphology modification of Al2Ca phase and further increase of both tensile strength and ductility. Compared with conventional squeeze casting, the mechanical properties of rheo-squeeze casting AZX912 alloy were improved by more than 20%. The improvement in mechanical properties was mainly attributed to the grain refinement in microstructure.
Microstructure and mechanical properties of rheo-squeeze casting AZ91-Ca magnesium alloy prepared by gas bubbling process
Zhang, Yang (author) / Wu, Guohua (author) / Liu, Wencai (author) / Zhang, Liang (author) / Pang, Song (author) / Ding, Wenjiang (author)
2014-10-31
8 pages
Article (Journal)
Electronic Resource
English
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