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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The self-similarity theory of high pressure torsion.
TL;DR: By analyzing the problem of high pressure torsion (HPT) in the rigid plastic formulation, it is shown that the power hardening law of plastically deformed materials leads to self-similarity of HPT, admitting a simple mathematical description of the process.
Journal ArticleDOI
Bimodal Grain Size Distribution Enhances Strength and Ductility Simultaneously in a Low-Carbon Low-Alloy Steel
TL;DR: In this paper, the average total dislocation density was measured by X-ray line profile analysis, whereas the geometrically necessary dislocation densities were obtained from the analysis of EBSD data.
Journal ArticleDOI
High temperature thermal stability of nanocrystalline 316L stainless steel processed by high-pressure torsion
Moustafa El-Tahawy,Moustafa El-Tahawy,Yi Huang,Hyelim Choi,Heeman Choe,János L. Lábár,János L. Lábár,Terence G. Langdon,Jenő Gubicza +8 more
TL;DR: Differential scanning calorimetry (DSC) was used to study the thermal stability of the microstructure and the phase composition in nanocrystalline 316L stainless steel processed by high pressure torsion (HPT) for ¼ and 10 turns as mentioned in this paper.
Journal ArticleDOI
Manipulating the powder size to achieve enhanced strength and ductility in harmonic structured Al alloy
TL;DR: In this article, a simple one-step powder metallurgy approach for producing bulk fine-grained Al2024 alloy with a unique harmonic structure and superior mechanical properties is described.
Journal ArticleDOI
Microstructural evolution of precipitation-hardened β-type titanium alloy through high-pressure torsion
Hakan Yilmazer,Mitsuo Niinomi,Ken Cho,Masaaki Nakai,Junko Hieda,Shigeo Sato,Yoshikazu Todaka +6 more
TL;DR: In this article, severe plastic deformation was conducted on samples of a precipitation-hardened Ti-29Nb-13Ta-4.6Zr (TNTZ) alloy.
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.
Journal ArticleDOI
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.
Journal ArticleDOI
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.
Journal ArticleDOI
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.