Results 261 to 270 of about 16,474,783 (283)

Texture evolution of Mg during high-pressure torsion

Journal of Materials Science, 2008
Polycrystalline magnesium of 99.8 wt.% purity was subjected to high-pressure torsion (HPT) at room temperature. A special technique was developed in order to enable HPT of Mg up to very high shear strains of 115 and hydrostatic pressures of 4 GPa. The texture development during HPT was investigated by systematic X-ray texture measurements.
Bonarski, Bartlomiej, Schafler, Erhard, Mingler, Bernhard, Skrotzki, Werner, Mikulowski, Boris, Zehetbauer, Michael   +5 more
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High-Pressure Torsion

2016
This chapter starts with a brief description of the technique and how to calculate the strain induced by high-pressure torsion (HPT). Thereafter, the effect of HPT on different classes of metal hydrides is discussed.
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High pressure torsion of intermetallic Zr3Al

Materials Science Forum, 2008
The L12-structured intermetallic compound Zr3Al can be rendered amorphous easily by several techniques. In the present study the structural evolution during high pressure torsion (HPT) was investigated systematically by transmission electron microscopy (TEM) methods.
Geist, David, Rentenberger, Christian, Karnthaler, Hans-Peter   +2 more
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Fabrication of nanograined silicon by high-pressure torsion

Journal of Materials Science, 2014
This paper describes fabrication of Si nanograins through allotropic phase transformation by concurrent application of high pressure and intense straining using high-pressure torsion (HPT). Single-crystalline Si(100) wafers were processed by HPT under a pressure of 24 GPa at room temperature.
Yoshifumi Ikoma, Kazunori Hayano, Kaveh Edalati, Katsuhiko Saito, Qixin Guo, Zenji Horita, Toshihiro Aoki, David J. Smith   +7 more
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A detailed model of high pressure torsion

Materials Science and Engineering: A, 2017
Abstract High Pressure Torsion (HTP) is a popular physical simulator to produce ultra-fine grained materials. Existing solutions of HPT predict a zero deformation and grain refinement near its sample’s longitudinal axis. However, experimental observations confirm that this is not typically the case.
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Application of High Pressure Torsion to Bulk Samples

Materials Science Forum, 2006
High pressure torsion (HPT) is a well-known procedure to impart severe plastic deformation (SPD) into metallic materials. It was reported that HPT produces grain sizes finer than those using other SPD processes such as equal-channel angular pressing (ECAP). However, the application of HPT has been restricted to thin disk samples.
Genki Sakai, Katsuaki Nakamura, Z. Horita, Terence G. Langdon   +3 more
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The dead metal zone in high-pressure torsion

Scripta Materialia, 2012
Plastic deformation behavior during high-pressure torsion (HPT) was analyzed by the finite element method in order to investigate heterogeneous deformation in HPT-processed disks. The effective strain and strain rate developed increase from the center to the edge of the HPT-processed disk; however, they decrease to zero at the surface corner of the ...
Lee, DJ, Yoon, EY, Park, LJ, Kim, HS
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Ring-Constraint High-Pressure Torsion Process

Metallurgical and Materials Transactions A, 2016
In this study, a constraint ring around a workpiece was employed in order to develop back pressure in addition to a compressive die pressure in high-pressure torsion (HPT) process. The influence of the constraint ring during the HPT process was analyzed using the finite element method and experimental analyses.
Joo, SH, Kim, HS
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High pressure torsion of amorphous Cu60Zr30Ti10 alloy

Journal of Applied Physics, 2008
High pressure torsion was applied to produce a disk-shaped specimen of Cu60Zr30Ti10 composition. The dependence of the morphology, microstructure, and thermal behavior on the applied shear strain was monitored by scanning and transmission electron microscopies, synchrotron x-ray diffraction, and calorimetry.
Sándor Hóbor, Ádám Révész, Péter J. Szabó, Alex P. Zhilyaev, Viktória Kovács Kis, János L. Lábár, Zsolt Kovács   +6 more
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Die design for high-pressure torsion

Vestnik KazNRTU, 2021
A.V. Volokitin, A.B. Naizabekov, I.E. Volokitina, E.A. Panin, G.Zh. Moldabaeva   +4 more
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