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A visualization of shear strain in processing by high-pressure torsion |
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| Authors: | Y. Cao Y. B. Wang S. N. Alhajeri X. Z. Liao W. L. Zheng S. P. Ringer T. G. Langdon Y. T. Zhu |
| Affiliation: | (1) School of Aerospace, Mechanical and Mechatronic Engineering, The University of Sydney, Sydney, NSW, 2006, Australia;(2) Materials Research Group, School of Engineering Sciences, University of Southampton, Southampton, SO17-1BJ, UK;(3) Shanghai Research Institute of Materials, 99 Handan Road, Shanghai, 200437, China;(4) Australian Key Centre for Microscopy & Microanalysis, The University of Sydney, Sydney, NSW, 2006, Australia;(5) Departments of Aerospace and Mechanical Engineering and Materials Science, University of Southern California, Los Angeles, CA 90089-1453, USA;(6) Department of Materials Science and Engineering, North Carolina State University, Raleigh, NC 27695, USA; |
| Abstract: | Optical microscopy was used to examine the shear strain imposed in duplex stainless steel disks during processing by high-pressure torsion (HPT). The results show a double-swirl pattern emerges in the early stages of HPT and the two centres of the swirl move towards the centre of the disk with increasing revolutions. Local shear vortices also develop with increasing numbers of revolutions. At 20 revolutions, there is a uniform shear strain pattern throughout the disk and no local shear vortices. |
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