Grain refinement and tensile strength of carbon nanotube-reinforced Cu matrix nanocomposites processed by high-pressure torsion

Yoon, Eun Yoo; Lee, Dong Jun; Park, Byungho; Akbarpour, M.R.; Farvizi, M.; Kim, Hyoung Seop

doi:10.1007/s12540-013-5004-4

Cited by 43 publications

(23 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…1. The HPT process with 5 revolutions was performed at room temperature and a speed of 1 rpm under 8 GPa using a semi-constrained HPT die 3,5,6) with a 1 mm total depth and a 10 mm diameter.…”

Section: Methodsmentioning

confidence: 99%

“…One of the attractive techniques developed for producing bulk UFG metallic materials is severe plastic deformation (SPD), 14) such as high-pressure torsion (HPT), 5,6) equal channel angular pressing (ECAP), 7) and accumulative roll bonding. 8) AlCu alloys are considered as very important structural materials in the aircraft industry due to their light weight and high strength.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Effect of Homogenization Treatment on the Microstructure and Mechanical Property Evolutions of As-Cast Al–Cu Alloy during High-Pressure Torsion

Aal

Choi

et al. 2014

Mater. Trans.

Self Cite

View full text Add to dashboard Cite

As-cast and homogenization treated as-cast AlCu (3 mass% Cu) alloy samples were processed via high-pressure torsion (HPT) under an applied pressure of 8 GPa with 5 revolutions at room temperature. Microstructure, mechanical properties, and fracture surface morphology of the HPT-processed AlCu were investigated, demonstrating that the HPT process successfully resulted in distinct grain refinements in both samples. Significant improvements in the microhardness, tensile properties, and deformation homogeneity due to fine grains, high grain boundary misorientation angle, and homogeneous distribution of the ª phase were achieved after the HPT process of the homogenized sample. The homogenization treatment of the as-cast AlCu has a significant effect on the fracture surface morphology and fracture mode of the HPTprocessed samples.

show abstract

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effect of Homogenization Treatment on the Microstructure and Mechanical Property Evolutions of As-Cast Al–Cu Alloy during High-Pressure Torsion

Aal

Choi

et al. 2014

Mater. Trans.

Self Cite

View full text Add to dashboard Cite

show abstract

“…It follows from Eqs. [3,4] that two-pass and four-pass TE with b = 60 deg impose maximum von Mises strains of e (2) = 4.0 and e (4) = 8.0, respectively. At the same time, calculation for seven-pass TE with b = 36 deg gives a value of e (7) = 5.9.…”

Section: A Mechanical Propertiesmentioning

confidence: 99%

“…The interest in SPD stems from unique properties that were exhibited by ultrafine-grained materials produced by SPD methods. [1][2][3][4] To date, there have been a no. of SPD processes developed at the laboratory scale; however, most of them prove difficult to be commercialized.…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Mechanical Properties of Copper Processed by Twist Extrusion with a Reduced Twist-Line Slope

Latypov

Yoon

Lee

et al. 2014

Metall Mater Trans A

Self Cite

View full text Add to dashboard Cite

Pure copper processed by a twist extrusion process with a reduced twist-line slope is investigated. Twist extrusion is a severe plastic deformation technique which is promising for scale-up because it allows for processing of relatively large metallic bars. On the way to commercialization, decreasing costs associated with processing is critical for twist extrusion. As one of the measures, reducing the twist-line slope-an important geometrical feature of twist extrusion-can be advantageous in terms of processing costs. The current study seeks to elucidate effects of reducing the twist-line slope on the microstructure, mechanical properties, and their heterogeneity in the processed metal, which were unclear because most of the previous research has focused on twist extrusion with high twist-line slopes (e.g., 60 deg). Results of the present study suggest that reducing the twist-line slope moderates grain refinement and limits improvement of mechanical properties of the twist-extruded metal. These findings are discussed in terms of the shear strain reversal which is inherent in the process.

show abstract

“…Various severe plastic deformation (SPD) methods were employed to achieve nano grain size range. Some of the usual SPD methods include accumulative roll bonding (ARB) [2], equal channel angular pressure (ECAP) [3], hot pressure torsion (HPT) [4], twist extrusion [5] and accumulative back extrusion (ABE) [6]. Among them repetitive upsetting-extrusion (RUE) is a relatively new process among severe deformation process [7,8].…”

Section: Introductionmentioning

confidence: 99%

Nano grain refinement and strengthening of copper under room temperature RUE process

Aghaie-Khafri

Anijdan²,

Meraj

2017

Scientia Iranica

View full text Add to dashboard Cite

In this investigation repetitive upsetting-extrusion (RUE) process was used to investigate the effect of severe plastic deformation on the microstructural changes and flow behavior of commercial pure copper. Initial material together with two passes, four passes and eight passes of RUE in annealed and non-annealed condition were studied. Results show that grain refinement, in the scale of nano meter, has mostly been achieved only after two passes of RUE which is essentially a combination of one upsetting and one extrusion path. Increasing the number of passes after four passes of RUE did not have discernible effect on the grain refinement. Such a behavior is explained to be due to saturation of dislocations and the formation of high angle grain boundaries after only two passes of RUE. The grains after eight passes of RUE process even became slightly larger than the two and the four passes of RUE. This was related to restoration phenomena occurring during high number of passes of RUE. Flow strength of the material after different passes substantially increased, though the rate at which the flow stress increased declined by increasing the number of passes. ETMB model were used to explain the deformation behavior of the RUE samples.

show abstract

Grain refinement and tensile strength of carbon nanotube-reinforced Cu matrix nanocomposites processed by high-pressure torsion

Cited by 43 publications

References 32 publications

Effect of Homogenization Treatment on the Microstructure and Mechanical Property Evolutions of As-Cast Al–Cu Alloy during High-Pressure Torsion

Effect of Homogenization Treatment on the Microstructure and Mechanical Property Evolutions of As-Cast Al–Cu Alloy during High-Pressure Torsion

Microstructure and Mechanical Properties of Copper Processed by Twist Extrusion with a Reduced Twist-Line Slope

Nano grain refinement and strengthening of copper under room temperature RUE process

Contact Info

Product

Resources

About

Grain refinement and tensile strength of carbon nanotube-reinforced Cu matrix nanocomposites processed by high-pressure torsion

Cited by 43 publications

References 32 publications

Effect of Homogenization Treatment on the Microstructure and Mechanical Property Evolutions of As-Cast Al&ndash;Cu Alloy during High-Pressure Torsion

Effect of Homogenization Treatment on the Microstructure and Mechanical Property Evolutions of As-Cast Al&ndash;Cu Alloy during High-Pressure Torsion

Microstructure and Mechanical Properties of Copper Processed by Twist Extrusion with a Reduced Twist-Line Slope

Nano grain refinement and strengthening of copper under room temperature RUE process

Contact Info

Product

Resources

About

Effect of Homogenization Treatment on the Microstructure and Mechanical Property Evolutions of As-Cast Al–Cu Alloy during High-Pressure Torsion

Effect of Homogenization Treatment on the Microstructure and Mechanical Property Evolutions of As-Cast Al–Cu Alloy during High-Pressure Torsion