A review on processing of aluminium and its alloys through Equal Channel Angular Pressing die

Vishnu, P.; Mohan, Rakesh; Sangeethaa, E. Krishna; Raghuraman, S.; Venkatraman, R.

doi:10.1016/j.matpr.2019.04.223

Cited by 21 publications

(15 citation statements)

References 97 publications

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“…There have been different methods and approaches to the manufacture of nanostructured aluminium alloys and composites. Severe plastic deformation (SPD) was reported (Thama, et al, 2007) and reviewed (Vishnu, et al, 2019) as efficient way for making bulk ultra-fine grained or nanostructured very high strain components. Ultrafine grained (UFG) and nanocrystalline substances are better wear resistant and harder than coarse grained counterparts (Joshi et al, 2014).…”

Section: Aluminium Alloys and Nanocompositesmentioning

confidence: 99%

“…Some other production methods of UFG Al microstructure like high pressure torsion (HPT), equal channel angular pressing (ECAP), asymmetric rolling (AR), cryo-rolling (CR) and accumulative roll bonding (ARB) have also been reported (Valiev and Langdon, (2006); Edalati and Horita, 2016;Zhilyaev and Langdon, 2008). Aluminium alloy grain refinement has been attained by other popular techniques (Vishnu, et al, 2019;Yu et al, 2015) and developed over the past two decades of which twist extrusion, ARB and hydrostatic extrusion (HE) are prominent. Various micro-structural growth T through ECAP processing of Al-Cu-Li, Al-Mg-Cu, Al-0.2Sc, Al-Mg-Sc, AA2219, Al-Mg-Mn-Zr, Al-7%Si, Al-Mg-Si, AA7475, Al-Mg alloys are readily reported in the literature (Thama, et al, 2007;Vishnu, et al, 2019;Prangnell et al, 2004;Garcia-Infanta et al, 2009).…”

Section: Aluminium Alloys and Nanocompositesmentioning

confidence: 99%

“…Aluminium alloy grain refinement has been attained by other popular techniques (Vishnu, et al, 2019;Yu et al, 2015) and developed over the past two decades of which twist extrusion, ARB and hydrostatic extrusion (HE) are prominent. Various micro-structural growth T through ECAP processing of Al-Cu-Li, Al-Mg-Cu, Al-0.2Sc, Al-Mg-Sc, AA2219, Al-Mg-Mn-Zr, Al-7%Si, Al-Mg-Si, AA7475, Al-Mg alloys are readily reported in the literature (Thama, et al, 2007;Vishnu, et al, 2019;Prangnell et al, 2004;Garcia-Infanta et al, 2009). Clay et al, (2012) reported the galvanic production of bimodal nanostructures by means of Al nanoparticle pattern wherein about 120 nm diameter size Al nanoparticle template, was substituted by metals like Pt, Ni, Cu, Au, In, Pd, Co, Pb, Ag and Fe due to its very low redox potential.…”

Section: Aluminium Alloys and Nanocompositesmentioning

confidence: 99%

See 2 more Smart Citations

Tribological and mechanical behaviours of nanostructured aluminium alloys and nanocomposites at elevated temperatures: A short review

Ajibola¹,

Owa²,

Adebayo³

et al. 2019

FUOYEJET

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Aluminium alloys demonstrate exceptional properties such as high strength-weight ratio and corrosion resistance are used for general engineering applications, automobile, automotives and in aerospace industries. However, they suffer some limitations as wear and creep at high temperatures. With the trending developments from nanometallurgy, diverse nano-particle compounds of mono and heterogeneous compositions have been used in reinforcing aluminium and its alloys as widely reported in the public domains. This paper reviews some of the vast literature on the enhancement of nanostructured aluminium alloys and reinforced aluminium nanocomposites. Importance is laid on the tribological and mechanical behaviours of the manufactured composites and nano-composites with respect to their production methods and applications at elevated (high) and cryogenic (low) temperatures. Keywords— Tribology; mechanical behaviours; nanostructure; aluminium alloys; nano-composites; elevated temperatures

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Section: Aluminium Alloys and Nanocompositesmentioning

confidence: 99%

Section: Aluminium Alloys and Nanocompositesmentioning

confidence: 99%

Section: Aluminium Alloys and Nanocompositesmentioning

confidence: 99%

See 1 more Smart Citation

Tribological and mechanical behaviours of nanostructured aluminium alloys and nanocomposites at elevated temperatures: A short review

Ajibola¹,

Owa²,

Adebayo³

et al. 2019

FUOYEJET

View full text Add to dashboard Cite

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“…When choosing the SPD method, it is necessary to take into account that in many methods for obtaining aluminium workpieces with UFG or NS, or the workpieces obtained after the implementation of the method have limited small dimensions, such as in the high-pressure torsion method [11][12][13][14], or plastic deformation is accompanied by numerous cycles, as in the equal-channel angular pressing [15][16][17] and multi axial forging [18,19]. All these processes are focused on creating high pressures in the zone of plastic deformation [6].…”

Section: Introductionmentioning

confidence: 99%

Stress State of 6063 Cold-Formed Aluminium Alloy Workpieces in a Closed Die

Ashkeyev¹,

Abishkenov²

2021

Metallofiz. Noveishie Tekhnol.

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The article presents the results of stress state analysis for workpieces from aluminium alloy 6063 cold-formed in a closed die. Mathematical methods of computer modelling (finite element method) and slip lines (slip-line field method) are used for the analysis. The experimental procedure for repeated cold deformation in a closed matrix (in several passes and/or cycles), the mechanisms of grain grinding and material hardening under the influence of grain-dislocation factors are described. The results of the stress state study of the material during cold deformation (at room temperature) show that the volume of the workpiece is mainly compressive stresses, the values of which are in the range from −273 MPa to −533 MPa. As found, due to the hydrostatic stress from the side of the punches and the side walls of the semi-dies, the workpiece is subjected to triaxial compression, which makes it possible to obtain volumetric spherical workpieces with ultrafine-grained nanostructure in a closed die with minimal processing cycles.

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“…It is well known that metallic materials processed by severe plastic deformation have ultrafine-grained microstructure and exhibit enhanced utility properties [1][2][3]. Low thermal stability of the UFG microstructure due to the high energy accumulated during SPD is one of the problems associated with the application of UFG materials in industry [4][5].…”

Section: Introductionmentioning

confidence: 99%

thermal stability of serely deformed Almg3 sheets

Hilšer

Snopiński

Rusz

et al. 2020

METAL 2020 Conference Proeedings

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In this article a continuous severe plastic deformation (SPD) process entitled dual rolls equal channel extrusion (DRECE) for producing ultrafine-grained (UFG) microstructure of thin sheets is presented. The DRECE process combines conventional equal channel angular pressing (ECAP) process and continual CONFORM process, and it can be easily scaled for industrial use. Keeping constant both the cross section and the length of the severely deformed strip of sheet, the DRECE method promotes a refinement of the microstructure. The effect of post SPD annealing at different temperatures (150 °C, 180 °C, 200 °C, 250 °C, 300 °C and 350 °C) for 30 minutes on the stability of severely deformed microstructure of investigated AlMg3 aluminium alloy. The initial grain size was ~ 7.9 μm and was reduced to 6.8 μm with maximum density of dislocation after 6 passes at room temperature, which were accompanied by the formation that is typical for low strain structures. The annealing treatment at temperatures lower than 180°C did n ot affe cted the microstructure significantly. A continuous grain growth occurred at higher temperatures (180°C-300°C) due to the continuous recrystallization. A bimodal microstructure having a bimodal dislocation density distribution was obtained through the discontinuous recrystallization at 350°C. The annealing led to some sort of bimodal grain mixture with the larger grains embedded in the severely deformed structure that provide and excellent combination of strength and ductility. Therefore, the DRECE process could be a promising industrial SPD method to continuously produce advanced construction materials with the advantages of energy and cost saving and high process efficiency.

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A review on processing of aluminium and its alloys through Equal Channel Angular Pressing die

Cited by 21 publications

References 97 publications

Tribological and mechanical behaviours of nanostructured aluminium alloys and nanocomposites at elevated temperatures: A short review

Tribological and mechanical behaviours of nanostructured aluminium alloys and nanocomposites at elevated temperatures: A short review

Stress State of 6063 Cold-Formed Aluminium Alloy Workpieces in a Closed Die

thermal stability of serely deformed Almg3 sheets

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