Abstract
This research examined in-situ creep behavior of three extruded high performance magnesium alloys (AE42, AJ32 and ZE10). Neutron diffraction was used to measure compressive creep behavior at 175°C in the extrusion direction. The AE42 and AJ32 alloys exhibited higher creep strains than the ZE10 alloy. The highest strain was recorded for AE42 (2.4%), while ZE10 exhibited greatest creep resistance (0.2% strain). Microstructure analysis has shown that the distribution and composition of secondary phases was critical for creep resistance. The aluminum containing alloys had acicular and globular intermetallics, whereas the ZE10 alloy contained fine and irregular intermetallics dispersed along grain boundaries, effectively contributing to pinning of grains under high temperature loads. Significant grain re-crystallization was also observed in the aluminum containing alloys, but was absent in ZE10.
This is a preview of subscription content, log in via an institution to check access.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
Similar content being viewed by others
References
Michael Avedesian, and Hugh Baker, ASM Specialty Handbook; Magnesium and Magnesium Alloys (Materials Park, OH: ASM International, 1999).
Q. Guo et al., “Elevated temperature compression behavior of Mg-Al-Zn alloys,” Materials Science and Technology, 22 (6) (2006), 725–729.
Edward F. Emley, Principles of Magnesium Technology (Long Island City, NY: Pergamon Press, 1966).
J. Yan et al., “Creep deformation mechanism of magnesium-based alloys,” Journal of Material Science, 43 (2008), 6952–6959.
H. Deming et al., “Indentation creep behavior of AE42 and Ca-containing AE41 alloys,” Materials Letters, 61 (2007), 1015–1019.
B.R. Powell et al., “Microstructure and creep behavior in AE42 Magnesium die-casting alloy,” Journal of Metals, 54 (8) (2002), 34–38.
B. Nami et al., “Effect of Ca and rare earch elements on impression creep properties of AZ91 magnesium alloy,” Metallurgical and Materials Transactions A, 41A (2010), 1973–1982.
A.A. Luo, “Recent magnesium alloy development for elevated temperature applications,” International Materials Reviews, 49 (1) (2004), 13–30.
T. Rypaev et al., “Microstructure of superplastic QE22 and EZ33 magnesium alloys,” Materials Letters, 62 (2008), 4041–4043.
D. Sediako and M. Gharghouri, “Neutron Diffraction Measurements of Residual Stress in Creep Resistant Mg Alloys,” Magnesium Technology 2008, TMS, 2008, 407–409.
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2012 TMS (The Minerals, Metals & Materials Society)
About this chapter
Cite this chapter
Fletcher, M., Bichler, L., Sediako, D. (2012). The Role of Intermetallics on Creep Behaviour of Extruded Magnesium Alloys. In: Mathaudhu, S.N., Sillekens, W.H., Neelameggham, N.R., Hort, N. (eds) Magnesium Technology 2012. Springer, Cham. https://doi.org/10.1007/978-3-319-48203-3_80
Download citation
DOI: https://doi.org/10.1007/978-3-319-48203-3_80
Publisher Name: Springer, Cham
Print ISBN: 978-3-319-48571-3
Online ISBN: 978-3-319-48203-3
eBook Packages: Chemistry and Materials ScienceChemistry and Material Science (R0)