An Investigation of Strain-Softening Phenomenon in Al–0.1% Mg Alloy during High-Pressure Torsion Processing

Authors: Huang, Y., Millet, J., Zhang, N.X., Jenei, P., Gubicza, J. and Langdon, T.G.

Journal: Advanced Engineering Materials

Volume: 22

Issue: 10

eISSN: 1527-2648

ISSN: 1438-1656

DOI: 10.1002/adem.201901578

Abstract:

An Al–0.1% Mg alloy is processed by high-pressure torsion (HPT) at room temperature. The Al–0.1% Mg alloy displays strain-softening phenomenon through hardness evolution: the hardness values in the disc center area are higher than at the disc edge area after 1/2, 1, and 3 turns, and the size of the hard region in the disc center gradually reduces as the number of turns increases from 1/2 to 3 turns. The hardness values evolve toward homogeneity along the disc diameters after 5 and 10 turns. Electron backscatter diffraction (EBSD) and X-ray line profile analysis suggest that the lower hardness values at the disc edge area in the Al–0.1% Mg alloy are related to a recovery/recrystallization mechanism where the material is subjected to heavy straining.

https://eprints.bournemouth.ac.uk/33384/

Source: Scopus