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HomeMaterials Science ForumMaterials Science Forum Vol. 879Recovery or Non-Recovery in Al-0.1% Mg and Al-1%...

Recovery or Non-Recovery in Al-0.1% Mg and Al-1% Mg Alloy during High-Pressure Torsion Processing

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Abstract:

The Al-1% Mg and Al-0.1% Mg alloys were both processed by high-pressure torsion (HPT) at room temperature. In the Al-1% Mg alloy, the hardness values in the disc centre area are lower than in the disc edge area after 1/2 and 1 turn, and the area of lower hardness values in the disc centre decreases as the number of turns increases from 1/2 to 1 turn. Finally, the hardness values are reasonably homogenous along the disc diameter as the number of turns increases to 5 and 10 turns. The Al-0.1% Mg alloy displays a different hardness evolution behavior: the hardness values in the disc centre are higher than at the disc edge 1/2 and 1 turn, and the area of higher hardness values decreases as the numbers of turn increases from 1/2 to 1 turn. The hardness values evolve towards homogeneity along the disc diameter after 5 and 10 turns. EBSD microstructure investigations in the Al-0.1% Mg alloy reveal that a few low-angle boundaries exist at the disc edge after 1/2 turn. It is suggested that the higher hardness values in the disc centre in the Al-0.1% Mg alloy are related to rapid recovery at the disc edge where the material is subjected to heavy straining.

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THERMEC 2016

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Periodical:

Materials Science Forum (Volume 879)

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773-778

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.879.773

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Online since:

November 2016

Authors:

Yi Huang*, Justine Millet, Nian Xian Zhang, Pedro Henrique R. Pereira, Terence G. Langdon

Keywords:

Al-0.1%Mg Alloy, Al-1%Mg Alloy, Hardness, High-Pressure Torsion, Microstructure

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