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HomeMaterials Science ForumMaterials Science Forum Vols. 838-839Effect of Solute Elements on Grain Refinement...

Effect of Solute Elements on Grain Refinement during Friction Stir Processing in High-Purity Aluminum

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Abstract:

Friction stir processing (FSP) is one of the severe plastic deformation (SPD) processes. It has been reported that SPD-processed Al with various purities attained a minimum grain size when Zener-Hollomon parameter is larger than 10¹⁶ s^-1. The minimum grain size is different by purity level and alloying elements. We investigated the influence of Fe solute atoms on grain refinement of high-purity Al on the condition that Zener-Hollomon parameter was larger than 10¹⁶ s^-1. FSP was conducted on Al-0.01%Fe, which was fabricated by using 5N Al (99.999% purity). FSP-ed Al-0.01%Fe exhibits the minimum grain size of 1.4 μm, although high-purity aluminums with more than 99.998% exhibits much larger minimum grain sizes of 30-40 μm. Only 101 at.ppm Fe played a critical role in the grain refinement of pure aluminums.

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Periodical:

Materials Science Forum (Volumes 838-839)

Pages:

116-121

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.838-839.116

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Online since:

January 2016

Authors:

Tokuteru Uesugi*, Hideaki Iwami, Yorinobu Takigawa, Kenji Higashi

Keywords:

Friction Stir Processing (FSP), High-Purity Aluminum, Minimum Grain Size, Severe Plastic Deformation (SPD), Zener-Hollomon Parameter

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© 2016 Trans Tech Publications Ltd. All Rights Reserved

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