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Investigating Anvil Alignment and Anvil Roughness on Flow Pattern Development in High-Pressure Torsion.

Huang, Y., Kawasaki, M. and Langdon, T.G., 2016. Investigating Anvil Alignment and Anvil Roughness on Flow Pattern Development in High-Pressure Torsion. In: IMRC2015: XXIV International Materials Research Congress 2015, 17-21 August 2015, Cancun, Mexico, imrc2015s4g-p001.

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HuangY-MRS OPL-2016-1818-1 (HPT, anvil alignment, anvil roughness, flow pattern).pdf - Accepted Version
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DOI: 10.1557/opl.2016.79

Abstract

High-pressure torsion (HPT) is a processing technique in which samples are subjected to a high pressure and torsional straining. Anvil alignment and anvil roughness are two important factors related to the successful application of the HPT processing technique. Using a two phase duplex stainless steel as a model material, experiments were conducted by placing the anvils in different amounts of initial misalignment. Experiments show that the flow patterns (the development of double-swirl patterns) in HPT are dependent upon the alignment of the anvils within the HPT facility. Through carefully designed experiments, it is shown that the presence of a double-swirl is a feature of HPT processing when the initial positions of the anvils have a small lateral misalignment. The effect of the double-swirl patterns on the hardness evolution was also evaluated quantitatively. By comparing the flow patterns developed on the disc upper surface using both rough and smooth anvils with a fixed anvil misalignment, it was demonstrated that there are some differences in the flow patterns which are dependent upon the anvil surface roughness.

Item Type:Conference or Workshop Item (Paper)
ISSN:0272-9172
Group:Faculty of Science & Technology
ID Code:34365
Deposited By: Symplectic RT2
Deposited On:03 Aug 2020 11:36
Last Modified:14 Mar 2022 14:23

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