Journal ArticleDOI
Using high-pressure torsion for metal processing: Fundamentals and applications
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TLDR
High pressure torsion (HPT) is a well-known technique for metal forming as discussed by the authors, where samples are subjected to a compressive force and concurrent torsional straining.About:
This article is published in Progress in Materials Science.The article was published on 2008-08-01. It has received 2499 citations till now.read more
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Outstanding mechanical properties of high-pressure torsion processed multiscale TWIP-cored three layer steel sheet
TL;DR: In this paper, three layer steel sheets composed of a twinning-induced plasticity (TWIP) steel core and two interstitial free (IF) steel sheath layers are processed by high pressure torsion up to 1 turn under an applied pressure of 6 GPa.
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Finite element analysis of the effect of friction in high pressure torsion
Song Yuepeng,Song Yuepeng,Wenke Wang,Gao Dongsheng,Eun Yoo Yoon,Duu-Jong Lee,Hyoung Seop Kim +6 more
TL;DR: In this article, the friction effect in high pressure torsion (HPT) was analyzed using the finite element method and the distribution of effective strain on the contact surface of the HPT samples under different friction conditions was investigated.
Journal ArticleDOI
An examination of the elastic distortions of anvils in high-pressure torsion
Pedro Henrique R. Pereira,Pedro Henrique R. Pereira,Roberto B. Figueiredo,Paulo Roberto Cetlin,Terence G. Langdon,Terence G. Langdon +5 more
TL;DR: In this article, the effect of elastic distortions of the anvils on plastic flow and sample geometry in the compression stage in high-pressure torsion was examined and it was shown 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.
Journal ArticleDOI
Superplastic martensitic Mn–Si–Cr–C steel with 900% elongation
TL;DR: In this paper, a homogeneous martensitic starting microstructure is obtained through thermomechanical processing (austenitization plus 12 true strain, followed by quenching) superplastic forming leads to a duplex structure consisting of ferrite and spherical micro-carbides.
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Three-dimensional analysis of plastic flow during high-pressure torsion
Roberto B. Figueiredo,Gustavo Coutinho Faria,Paulo Roberto Cetlin,Terence G. Langdon,Terence G. Langdon +4 more
TL;DR: In this paper, the theoretical plastic flow occurring during high-pressure torsion and finite element modeling of this technique to complement the theory is presented. But, the use of imposed plastic deformation as a single parameter to compare results of samples processed by severe plastic deformations is not always accurate.
References
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Journal ArticleDOI
Bulk nanostructured materials from severe plastic deformation
TL;DR: In this article, the authors present methods of severe plastic deformation and formation of nanostructures, including Torsion straining under high pressure, ECA pressing, and multiple forging.
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Principles of equal-channel angular pressing as a processing tool for grain refinement
TL;DR: In this article, a review examines recent developments related to the use of ECAP for grain refinement including modifying conventional ECAP to increase the process efficiency and techniques for up-scaling the procedure and for the processing of hard-to-deform materials.
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Novel ultra-high straining process for bulk materials—development of the accumulative roll-bonding (ARB) process
TL;DR: In this paper, the accumulative roll-bonding (ARB) method was proposed to introduce high plastic strain without any geometrical change if the reduction in thickness is maintained to 50% every rolling pass.
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Producing bulk ultrafine-grained materials by severe plastic deformation
Ruslan Z. Valiev,Yuri Estrin,Zenji Horita,Zenji Horita,Terence G. Langdon,Michael J. Zehetbauer,Yuntian Zhu +6 more
TL;DR: In this article, an overview of recent achievements and new trends in the production of bulk ultrafine-grained (UFG) materials using severe plastic deformation (SPD) is presented.