Abstract
A magnesium AZ31 alloy was processed by equal-channel angular pressing (ECAP) for up to 8 passes to reduce the grain size to ~1.0 μm. Following ECAP, microhardness measurements were taken to evaluate the mechanical properties of the material. Ball-on-disc dry sliding tests were conducted to compare the wear behaviour of the as-received alloy and the alloy processed by ECAP. The surface topography and volume loss were recorded for all samples. The results show that the fluctuations and average values of the coefficient of friction are improved after processing by ECAP. In addition, there is a decrease in the wear depth and volume loss with increasing numbers of ECAP passes. The ECAP-processed alloy has a higher wear resistance than the unprocessed alloy and it is a suitable candidate material for use in industrial applications.
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Acknowledgements
This work was supported in part by the National Natural Science Foundation of China under Grant no. 51105102 and in part by the National Science Foundation of the United States under Grant no. DMR-1160966. Partial support was provided by the National Basic Research Program of China (Grant no. 2012CB934100), the China Postdoctoral Science Foundation (Grant no. 2012T50324) and the Scientific Research Foundation of Harbin Institute of Technology under Grant no. HIT. 2011.513.
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Xu, J., Wang, X., Zhu, X. et al. Dry sliding wear of an AZ31 magnesium alloy processed by equal-channel angular pressing. J Mater Sci 48, 4117–4127 (2013). https://doi.org/10.1007/s10853-013-7224-x
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DOI: https://doi.org/10.1007/s10853-013-7224-x