An alternative approach in ceramic shell investment casting of AZ91D magnesium alloy: in situ melting technique
In this research, the possibility of ceramic shell investment casting of a magnesium alloy using in situ melting technique was explored. AZ91D granules were charged into shell investment mould and in situ melted under various processing parameters including heating temperature, flux application, she...
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my.utm.517622018-10-21T04:33:32Z http://eprints.utm.my/id/eprint/51762/ An alternative approach in ceramic shell investment casting of AZ91D magnesium alloy: in situ melting technique Jafari, Hassan Idris, Mohd. Hasbullah Ourdjini, Ali TJ Mechanical engineering and machinery In this research, the possibility of ceramic shell investment casting of a magnesium alloy using in situ melting technique was explored. AZ91D granules were charged into shell investment mould and in situ melted under various processing parameters including heating temperature, flux application, shell mould thickness and permeability. Scanning electron microscopy, energy dispersive X-ray spectroscopy and X-ray diffraction techniques were used to characterise the cast samples. Thermal analysis was employed to further investigate the effect of mould thickness on the solidification behaviour of the metal. It was found that mixing flux with the granules not only reduced the temperature at which melting can be achieved, but it also contributed to produce castings with acceptable surface quality. The use of thinner mould provided higher solidification rate, which is believed to favour in situ melting of the granules. It enabled melting of the granules at 650 °C, which in turn helped to suppress the mould-metal reaction and produce castings with good surface quality. Shell mould permeability showed no influence on suppressing the mould-metal reaction at 650 °C Elsevier B.V. 2014 Article PeerReviewed Jafari, Hassan and Idris, Mohd. Hasbullah and Ourdjini, Ali (2014) An alternative approach in ceramic shell investment casting of AZ91D magnesium alloy: in situ melting technique. Journal of Materials Processing Technology, 214 (4). pp. 988-997. ISSN 0924-0136 http://dx.doi.org/10.1016/j.jmatprotec.2013.11.004 |
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TJ Mechanical engineering and machinery Jafari, Hassan Idris, Mohd. Hasbullah Ourdjini, Ali An alternative approach in ceramic shell investment casting of AZ91D magnesium alloy: in situ melting technique |
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In this research, the possibility of ceramic shell investment casting of a magnesium alloy using in situ melting technique was explored. AZ91D granules were charged into shell investment mould and in situ melted under various processing parameters including heating temperature, flux application, shell mould thickness and permeability. Scanning electron microscopy, energy dispersive X-ray spectroscopy and X-ray diffraction techniques were used to characterise the cast samples. Thermal analysis was employed to further investigate the effect of mould thickness on the solidification behaviour of the metal. It was found that mixing flux with the granules not only reduced the temperature at which melting can be achieved, but it also contributed to produce castings with acceptable surface quality. The use of thinner mould provided higher solidification rate, which is believed to favour in situ melting of the granules. It enabled melting of the granules at 650 °C, which in turn helped to suppress the mould-metal reaction and produce castings with good surface quality. Shell mould permeability showed no influence on suppressing the mould-metal reaction at 650 °C |
format |
Article |
author |
Jafari, Hassan Idris, Mohd. Hasbullah Ourdjini, Ali |
author_facet |
Jafari, Hassan Idris, Mohd. Hasbullah Ourdjini, Ali |
author_sort |
Jafari, Hassan |
title |
An alternative approach in ceramic shell investment casting of AZ91D magnesium alloy: in situ melting technique |
title_short |
An alternative approach in ceramic shell investment casting of AZ91D magnesium alloy: in situ melting technique |
title_full |
An alternative approach in ceramic shell investment casting of AZ91D magnesium alloy: in situ melting technique |
title_fullStr |
An alternative approach in ceramic shell investment casting of AZ91D magnesium alloy: in situ melting technique |
title_full_unstemmed |
An alternative approach in ceramic shell investment casting of AZ91D magnesium alloy: in situ melting technique |
title_sort |
alternative approach in ceramic shell investment casting of az91d magnesium alloy: in situ melting technique |
publisher |
Elsevier B.V. |
publishDate |
2014 |
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http://eprints.utm.my/id/eprint/51762/ http://dx.doi.org/10.1016/j.jmatprotec.2013.11.004 |
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13.159267 |