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Al–Ti powder produced through mechanical alloying for different times

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Abstract

A powder mixture of aluminum, 10 wt% titanium, and 1.5 wt% of a wax acting as process control agent (PCA), has been attrition-milled for 2–20 h. Titanium powder had been previously ground to a lower particle size to make it similar to the as-received aluminum particle size. The overall aim of this work was to achieve a metastable titanium solution in the aluminum matrix. Changes with milling time of particle size and shape, microstructure, hardness and other powder characteristics have been studied. Given the used experimental-conditions, a process time of 10 h has been selected for the mechanical alloying (MA) of Al–10Ti powder, attaining a compromise between uniform microstructure development and a not so long processing time. At this milling time aluminum dissolves about 9 wt% Ti, increasing its Vickers microhardness (202 VH20) more than 10 times with reference to the starting Al powder (20 VH20). Milled particle size is smaller than the starting one (17 vs. 44 μm). Increasing milling for longer times, up to 20 h, does not produce important changes in powders structure.

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Acknowledgements

This work was supported by the C.I.C.Y.T., Madrid, under research project DPI2005-03711.

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Correspondence to F. G. Cuevas.

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Cuevas, F.G., Cintas, J., Montes, J.M. et al. Al–Ti powder produced through mechanical alloying for different times. J Mater Sci 41, 8339–8346 (2006). https://doi.org/10.1007/s10853-006-1029-0

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  • DOI: https://doi.org/10.1007/s10853-006-1029-0

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