Abstract
Casting is a net shape or near net shape forming process so work-hardening will not be applicable for improving properties of magnesium cast alloys. Grain refinement, solid-solution strengthening, precipitation hardening and specially designed heat treatment are the techniques used to enhance the properties of these alloys. This research focusses on grain refinement of magnesium alloy AZ91D, which is a widely used commercial cast alloy. Recently, Al-B based master alloys have shown potential in grain refining AZ91D. A comparative study of the grain refinement of AZ91D by addition of 0.02wt%B, 0.04wt%B, 0.1wt%B, 0.5wt%B and 1.0wt%B of A1-5B master alloy and equivalent amount of solute element aluminium is described in this paper. Hardness profile of AZ91D alloyed with boron and aluminium is compared.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
References
D. Eliezer, E. Aghion, F.H. Fross, “Magnesium Science, technology and applications”, Journal of Advanced Performance Materials, 5 (1998), 201–212
Chen et al., “Grain refinement of AZ91D magnesium alloy by SiC”, Journal of Alloys and Compounds, 496 (1–2) (2010), 218–225
Liu et al., “Effect of Mg-TiB2 master alloy on the grain refinement of AZ91D magnesium alloy”, Journal of Alloys and compounds, 487 (1–2) (2009), 202–205
Chen et al., “Grain refinement of AZ91D magnesium alloy by Al-Ti-B master alloy and its effect on mechanical properties”, Materials & Design, 34 (2012), 637–648
Suresh et al., “Influence of boron addition on the grain refinement and mechanical peoperties of AZ91 Mg alloy”, Materials Science and Engineering A, 525 (2009) 207–210
L Piejie, T. Bin and E.G. Kandalova, “Microstructure and properties of AZ91D alloy with Ca additions”, Materials Letters 59 (6) (2005), 671–675
Kim, Y., Yim, C., and You, B., “Grain refining mechanism in Mg-Al base alloys with carbon addition”, Scripta Materialia, 57 (8) (2007), 691–694
Nishino et al., “Grain refinement of magnesium casting alloys by boron addition”, In: Proceedings of the International Conference on Magnesium Alloys and their Applications, September 2000. Germany: Wiley, 59–64
Dargusch et al., “The effect of aluminium content on the mechanical properties and microstructure of die cast binary magnesium-aluminium alloys”, Materials Transactions, 47 (4) (2006), 977–982
L. Backerud and M. Johnsson: in Light Metals, W. Hale, ed., TMS, Warrendale, PA, 1996, 679–85
I. Maxwell and A. Hellawell, “A simple model for grain refinement during solidification”, Acta Metallurgica, 23 (1975), 229–37
Y.C. Lee, A.K. Dahle, D.H. Stjohn, “The role of solute in grain refinement of magnesium”, Metallurgical and Materials Transaction, 31A (11) (2000) 2895–2906.
Cheng et al., “Effect of Sr addition on the grain refinement of AZ31 magnesium alloys”, Progress in Natural Science: Materials International, 23 (1) (2013), 7–12
Wang, X, “The formation of A1B2 in an Al-B master alloy”, Journal of Alloys and Compounds, 403 (2005) 283–287
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2014 TMS (The Minerals, Metals & Materials Society)
About this chapter
Cite this chapter
Joshi, U., Babu, N.H. (2014). Effect of Al Addition on Microstructure of AZ91D. In: Alderman, M., Manuel, M.V., Hort, N., Neelameggham, N.R. (eds) Magnesium Technology 2014. Springer, Cham. https://doi.org/10.1007/978-3-319-48231-6_41
Download citation
DOI: https://doi.org/10.1007/978-3-319-48231-6_41
Publisher Name: Springer, Cham
Print ISBN: 978-3-319-48589-8
Online ISBN: 978-3-319-48231-6
eBook Packages: Chemistry and Materials ScienceChemistry and Material Science (R0)