Hollow cone high-pressure torsion: Microstructure and tensile strength by unique severe plastic deformation

Um, Ho Yong; Yoon, Eun Yoo; Lee, Jun Young; Lee, Chong Soo; Park, Lee Ju; Lee, Sunghak; Kim, Hyoung Seop

doi:10.1016/j.scriptamat.2013.09.032

Cited by 17 publications

(8 citation statements)

References 24 publications

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“…[121] Tube channel pressing (TCP) [122,123] Parallel tubular channel angular pressing (PTCAP) [124] Single-roll angularrolling (SRAR) [125] Spiral equal channel angular extrusion (Sp-ECAE) [126] High pressure tube twisting (HPTT) [128,129] 3 Rotation torsion [130] 4 High-pressure shearing (t-HPS) [131] 5 HPT for ring specimens [132] High pressure torsion for bulk samples [28] Continuous highpressure torsion for bars/rods [29,133] High pressure sliding [134] Cone-cone method [135] Hollow cone highpressure torsion [136] Incremental high pressure torsion [137] Compressive torsion processing [138] High pressure double torsion (HPDT) [139] High pressure torsioncylindrical segment (HPT-CS)…”

Section: Summery and Conclusionmentioning

confidence: 99%

An overview on severe plastic deformation: research status, techniques classification, microstructure evolution, and applications

Bagherpour

Pardis

Reihanian

et al. 2018

Int J Adv Manuf Technol

120

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The present overview gives a new approach toward developments and recent achievements in severe plastic deformation. The review focuses on several subjects. First, an outline of SPD research status in the world is presented by literature analysis based on the total number of publications, citations and the contribution of the topranked countries. Second, the mechanisms of grain refinement and grain growth during SPD processing are discussed by means of the latest concepts. Third, all SPD methods invented so far are classified based on a new approach. Up to now, the growing tendency of researchers to introduce new SPD techniques results in a large number of SPD methods which can be considered as new or modified techniques or a combination of previous ones. Such a reference can help to prevent the future duplication to introduce the SPD processes, which are technically similar. At the end, the practical applications of ultrafine/nanostructured materials and industrial commercialization of SPD methods are summarized.

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Section: Summery and Conclusionmentioning

confidence: 99%

An overview on severe plastic deformation: research status, techniques classification, microstructure evolution, and applications

Bagherpour

Pardis

Reihanian

et al. 2018

Int J Adv Manuf Technol

120

View full text Add to dashboard Cite

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“…Due to the small dimensions of the produced samples, the conventional HPT specimens could not be used in a practical application for material fabrication. However, recent HPT studies represent upscaled or modified techniques to produce large-scale disks and cone-shaped specimen 20 , 21 as well as strips or rods 22 – 24 . Such a development allows HPT to be considered as a plastic forming method for manufacturing the parts of nanocrystalline materials.…”

Section: Introductionmentioning

confidence: 99%

Superior Strength and Multiple Strengthening Mechanisms in Nanocrystalline TWIP Steel

Kim

Enikeev

Seol

et al. 2018

Sci Rep

Self Cite

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The strengthening mechanism of the metallic material is related to the hindrance of the dislocation motion, and it is possible to achieve superior strength by maximizing these obstacles. In this study, the multiple strengthening mechanism-based nanostructured steel with high density of defects was fabricated using high-pressure torsion at room and elevated temperatures. By combining multiple strengthening mechanisms, we enhanced the strength of Fe-15 Mn-0.6C-1.5 Al steel to 2.6 GPa. We have found that solute segregation at grain boundaries achieves nanograined and nanotwinned structures with higher strength than the segregation-free counterparts. The importance of the use of multiple deformation mechanism suggests the development of a wide range of strong nanotwinned and nanostructured materials via severe plastic deformation process.

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“…In addition to the aforementioned HPT facilities and constraining conditions, 3D FEM simulations were also performed in a cone-shaped sample in the severe plastic deformation technique known as hollow cone high-pressure torsion. 45) The simulation results revealed that the asdeformed cone displays a highly heterogeneous strain distribution with lower strain values at the tip of the workpiece.…”

Section: Hpt Facilities and Constraining Conditionsmentioning

confidence: 93%

Finite Element Modelling of High-Pressure Torsion: An Overview

Pereira

Figueiredo

2019

Mater. Trans.

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Finite element modelling (FEM) has been extensively performed to study the flow process, the distribution of hydrostatic stress and the temperature rise in materials processed by high-pressure torsion (HPT). This overview provides a summary and a critical assessment of the most important findings obtained by means of these FEM simulations which permitted a better understanding about the microstructural evolution during processing by HPT. For convenience, FEM investigations focused on examining the nature of the HPT facility, the plastic flow, the hydrostatic pressure and the temperature evolution in HPT processing were separated into different topics. It is shown the distributions of strain, temperature and hydrostatic pressure along the disc diameter depend upon different factors such as the configuration of the HPT facility and the dimensions of the processed sample. [

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Hollow cone high-pressure torsion: Microstructure and tensile strength by unique severe plastic deformation

Cited by 17 publications

References 24 publications

An overview on severe plastic deformation: research status, techniques classification, microstructure evolution, and applications

An overview on severe plastic deformation: research status, techniques classification, microstructure evolution, and applications

Superior Strength and Multiple Strengthening Mechanisms in Nanocrystalline TWIP Steel

Finite Element Modelling of High-Pressure Torsion: An Overview

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