Recovery or non-recovery in Al-0.1% Mg and Al-1% Mg alloy during high-pressure torsion processing

Authors: Huang, Y., Millet, J., Zhang, N.X., Pereira, P.H.R. and Langdon, T.G.

Journal: Materials Science Forum

Volume: 879

Pages: 773-778

eISSN: 1662-9752

ISSN: 0255-5476

DOI: 10.4028/www.scientific.net/MSF.879.773

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 thedisc 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.

Source: Scopus

Recovery or non-recovery in Al-0.1% Mg and Al-1% Mg alloy during high-pressure torsion processing

Authors: Huang, Y., Millet, J., Zhang, N.X., Pereira, P.H.R. and Langdon, T.G.

Conference: THERMEC 2016: 9th International Conference on Processing & Manufacturing of Advanced Materials

Dates: 29 May-3 June 2016

Journal: Materials Science Forum

Volume: 879

Pages: 773-778

eISSN: 1662-9752

ISBN: 9783035711295

ISSN: 0255-5476

DOI: 10.4028/www.scientific.net/MSF.879.773

Abstract:

© 2017 Trans Tech Publications, Switzerland. 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 thedisc 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.

Source: Manual

Preferred by: Yi Huang