Hardening mechanism of commercially pure Mg processed by high pressure torsion at room temperature
Hardening mechanism of commercially pure Mg processed by high pressure torsion at room temperature
Coarse-grained Mg in the as-cast condition and fine-grained Mg in the extruded condition were processed by high pressure torsion (HPT) at room temperature for up to 16 turns. Microstructure observation and texture analysis indicate that to fulfil the Von Mises criterion, the non-basal slip is activated in the as-cast Mg and tension twinning is activated in the as-extruded Mg. Although the deformation mechanism is different in the as-cast Mg and the as-extruded Mg during HPT, their hardening evolutions are similar, i.e. after 1/8 turn of HPT, microhardness of the as-cast Mg and the extruded Mg both show a significant increase and further HPT processing does not significantly further increase the microhardness. Texture strengthening can explain the rapid hardening. Hardness anisotropy and texture data results suggest that texture strengthening plays an important role for both types of samples. Texture strengthening weakens with decreasing grain size.
95-106
Qiao, X.G.
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Zhao, Y.W.
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Gan, W.M.
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Chen, Y.
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Zheng, M.Y.
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Wu, K.
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Gao, N.
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Starink, M.J.
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28 September 2014
Qiao, X.G.
98a947bc-f5af-4841-9c53-c59a2d3fb9f8
Zhao, Y.W.
bfcedd2e-7b53-4266-b821-074b2a65eadf
Gan, W.M.
0993d58a-8d02-4ec4-aea5-0cd12c9cf506
Chen, Y.
aa3aa967-2aa4-499c-9265-8e6a7e7fb9e5
Zheng, M.Y.
dd9a887e-b609-4e63-8ab1-982d5270a252
Wu, K.
7ca23420-1642-4375-a2e8-6332351a1a97
Gao, N.
9c1370f7-f4a9-4109-8a3a-4089b3baec21
Starink, M.J.
fe61a323-4e0c-49c7-91f0-4450e1ec1e51
Qiao, X.G., Zhao, Y.W., Gan, W.M., Chen, Y., Zheng, M.Y., Wu, K., Gao, N. and Starink, M.J.
(2014)
Hardening mechanism of commercially pure Mg processed by high pressure torsion at room temperature.
Materials Science and Engineering: A, 619, .
(doi:10.1016/j.msea.2014.09.068).
Abstract
Coarse-grained Mg in the as-cast condition and fine-grained Mg in the extruded condition were processed by high pressure torsion (HPT) at room temperature for up to 16 turns. Microstructure observation and texture analysis indicate that to fulfil the Von Mises criterion, the non-basal slip is activated in the as-cast Mg and tension twinning is activated in the as-extruded Mg. Although the deformation mechanism is different in the as-cast Mg and the as-extruded Mg during HPT, their hardening evolutions are similar, i.e. after 1/8 turn of HPT, microhardness of the as-cast Mg and the extruded Mg both show a significant increase and further HPT processing does not significantly further increase the microhardness. Texture strengthening can explain the rapid hardening. Hardness anisotropy and texture data results suggest that texture strengthening plays an important role for both types of samples. Texture strengthening weakens with decreasing grain size.
Text
Qiao et al HPT Mg MSEA.pdf
- Author's Original
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Published date: 28 September 2014
Organisations:
Engineering Mats & Surface Engineerg Gp
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Local EPrints ID: 369186
URI: http://eprints.soton.ac.uk/id/eprint/369186
ISSN: 0921-5093
PURE UUID: 897c6185-9ee5-4350-98fe-6aa9fdf3ba4f
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Date deposited: 29 Sep 2014 12:33
Last modified: 15 Mar 2024 03:10
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Author:
X.G. Qiao
Author:
Y.W. Zhao
Author:
W.M. Gan
Author:
Y. Chen
Author:
M.Y. Zheng
Author:
K. Wu
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