This work was supported by the European Research Council under ERC grant agreement no. 267464-SPDMETALS.
Evolution of Strength and Homogeneity in a Magnesium AZ31 Alloy Processed by High-Pressure Torsion at Different Temperatures†
Article first published online: 20 JUL 2012
Copyright © 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Advanced Engineering Materials
Special Issue: Nanostructured Materials
Volume 14, Issue 11, pages 1018–1026, November 2012
How to Cite
Huang, Y., Figueiredo, R. B., Baudin, T., Brisset, F. and Langdon, T. G. (2012), Evolution of Strength and Homogeneity in a Magnesium AZ31 Alloy Processed by High-Pressure Torsion at Different Temperatures. Adv. Eng. Mater., 14: 1018–1026. doi: 10.1002/adem.201200016
- Issue published online: 2 NOV 2012
- Article first published online: 20 JUL 2012
- Manuscript Accepted: 17 JUN 2012
- Manuscript Received: 13 JAN 2012
Processing through the application of severe plastic deformation (SPD) is attractive because it produces significant grain refinement and high strength. The standard procedure for performing SPD processing is through the use of equal-channel angular pressing (ECAP) but in practice it is difficult to perform ECAP on the magnesium AZ31 alloy at room temperature because the material cracks or exhibits segmentation. This difficulty was avoided in the present investigation by processing the alloy using high-pressure torsion (HPT). The results show that HPT provides an excellent procedure for producing significant grain refinement in the AZ31 alloy. At temperatures of 296 and 373 K, the processed grain sizes are in the submicrometer range and there is an evolution toward microstructural homogeneity after 5 turns. By contrast, at the higher temperature of 473 K, which is a typical temperature for ECAP, the grains grow during the processing operation.