An examination of the elastic distortions of anvils in high-pressure torsion
An examination of the elastic distortions of anvils in high-pressure torsion
Experiments and finite element modelling were used to examine the effect of elastic distortions of the anvils on plastic flow and sample geometry in the compression stage in high-pressure torsion. The results demonstrate that the curved disc surfaces observed consistently in HPT processing originate from elastic deformation of the anvils and the measured variations in the thicknesses of the samples depend upon the imposed pressure. It is shown also that the samples are further deformed during unloading of the anvils and this produces a peak in the strain in the central region of the disc as recorded in several experimental measurements of the local microhardness.
finite element method, hardness measurements, high-pressure torsion, severe plastic deformation
201-208
Pereira, Pedro .Henrique R.
9ee129fd-0e06-482d-990c-971aaf83b1d0
Figueiredo, Roberto B.
2e0060b8-6368-4d87-825a-c3cb90e92145
Cetlin, Paulo R.
6fe5efb8-7976-4d56-8aae-08cbf76b9628
Langdon, Terence G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86
17 April 2015
Pereira, Pedro .Henrique R.
9ee129fd-0e06-482d-990c-971aaf83b1d0
Figueiredo, Roberto B.
2e0060b8-6368-4d87-825a-c3cb90e92145
Cetlin, Paulo R.
6fe5efb8-7976-4d56-8aae-08cbf76b9628
Langdon, Terence G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86
Pereira, Pedro .Henrique R., Figueiredo, Roberto B., Cetlin, Paulo R. and Langdon, Terence G.
(2015)
An examination of the elastic distortions of anvils in high-pressure torsion.
Materials Science and Engineering: A, 631, .
(doi:10.1016/j.msea.2015.02.052).
Abstract
Experiments and finite element modelling were used to examine the effect of elastic distortions of the anvils on plastic flow and sample geometry in the compression stage in high-pressure torsion. The results demonstrate that the curved disc surfaces observed consistently in HPT processing originate from elastic deformation of the anvils and the measured variations in the thicknesses of the samples depend upon the imposed pressure. It is shown also that the samples are further deformed during unloading of the anvils and this produces a peak in the strain in the central region of the disc as recorded in several experimental measurements of the local microhardness.
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Accepted/In Press date: 19 February 2015
e-pub ahead of print date: 27 February 2015
Published date: 17 April 2015
Keywords:
finite element method, hardness measurements, high-pressure torsion, severe plastic deformation
Organisations:
Engineering Mats & Surface Engineerg Gp
Identifiers
Local EPrints ID: 377253
URI: http://eprints.soton.ac.uk/id/eprint/377253
ISSN: 0921-5093
PURE UUID: b494b488-9422-4def-8b20-79a395d05431
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Date deposited: 20 May 2015 15:58
Last modified: 15 Mar 2024 03:13
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Contributors
Author:
Pedro .Henrique R. Pereira
Author:
Roberto B. Figueiredo
Author:
Paulo R. Cetlin
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