Abstract
SF6 gas has been generally used for Mg alloys during melting and casting as a cover gas. The use of SF6 gas, however, will be limited owing to its significant impact on global warming. Non-SF6 process during melting and casting in diecasting industry has been proved with Eco-Mg alloys by a simple addition of small amount of CaO into AZ91D and AM60B Mg alloys. This paper will show non-SF6 diecasting procedures for AZ91D Eco-Mg alloys. Cold-chamber and hot-chamber diecasting mass productions were performed by using a Toshiba 135-ton cold chamber and a Frech 200-ton hot chamber diecasting machines under CO2 atmosphere without SF6 gas. An emphasis will be on proportional strength and ductility relationship of Eco-Mg alloys, in part, due to a high-quality melt, refined grain size and Al2Ca second phase strengthening. Microstructures and mechanical properties of AZ91D Eco-Mg alloys will be evaluated in comparison with those of conventional AZ91D Mg alloy.
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© 2011 TMS (The Minerals, Metals & Materials Society)
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Kim, S.K. (2011). Proportional Strength-Ductility Relationship of Non-SF6 Diecast AZ91D Eco-Mg Alloys. In: Sillekens, W.H., Agnew, S.R., Neelameggham, N.R., Mathaudhu, S.N. (eds) Magnesium Technology 2011. Springer, Cham. https://doi.org/10.1007/978-3-319-48223-1_25
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DOI: https://doi.org/10.1007/978-3-319-48223-1_25
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