Densification of Al-Y2O3 composite powder by equal channel angular pressing

Yarra, Ramu; Venkatachalam, Perumal; Kumar, Suresh; Ravisankar, B.; Jayasankar, K.; Mukherjee, P.

doi:10.1007/s12666-010-0124-8

Cited by 19 publications

(10 citation statements)

References 13 publications

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“…ecaP was used to consolidate aluminium (al) -Yttria composite powder by incorporating a back pressure. this produced a nearly fully relative density compaction at atmospheric temperature [4]. back pressure assisted ecaP of al particles produces bulk material with better metallurgical bonding when compared to the ecaP carried out with out the aid of back pressure [10].…”

Section: Introductionmentioning

confidence: 95%

“…application of severe plastic deformation (SPd) methods have been developed and evaluated successfully for the solid-state recycling of metal scraps. SPd methods like, equal channel angular pressing (ecaP) [4], high pressure torsion (hPt) [5], friction stir extrusion (FSe) [6], cyclic extrusion and compression (cec) [7] etc., are viable metal forming routes followed not only for producing ultra-fine-grained high strength materials but also not limited to produce solid bulk products form waste metal scraps.…”

Section: Introductionmentioning

confidence: 99%

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Archives of Metallurgy and Materials

Palanivel,

Vigneshwaran,

Alshqirate

et al. 2021

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EffEct of Machining ProcEss ParaMEtErs and nuMbEr of Pass on coMPaction bEhaviour of coMMErcially PurE aluMiniuM chiPs consolidatEd by Equal channEl angularPrEssing (EcaP) using rEsPonsE surfacE MEthodology this work investigates the compaction behaviour of commercial pure aluminium chips (cP al) produced during a machining operation and subsequently consolidated by equal channel angular Pressing (ecaP). empirical models were developed to describe the relative density and hardness of the compacted product of ecaP as functions of the initial machining input parameters including cutting edge angle (ca), depth of cut (dOc) and then the number of consolidation pass during ecaP. the models were developed utilizing response surface methodology (RSM) based on data from a central composite face centred factorial design of experiments approach. the models were then validated by using analysis of variance (anOva). the effect of input parameters on the relative density and hardness of the ecaP consolidated samples are presented and discussed including details as regards to the mechanical and microstructural properties. an optimum set of input parameters are identified and presented where the best relative density and hardness are demonstrated.

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Section: Introductionmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

Archives of Metallurgy and Materials

Palanivel,

Vigneshwaran,

Alshqirate

et al. 2021

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“…Consolidation by SPD relies on plastic deformation of individual particles, rather than diffusion, to make bonding and thus may be performed at much lower temperatures and shorter times, compared to conventional sintering processes [30]. This technique has been utilized effectively to compact different composite powders such as Al-Y 2 O 3 [31], Al-Al 2 O 3 [32,33] and AA7075-ZrO 2 [34].…”

Section: Introductionmentioning

confidence: 99%

Microstructure and properties of ZrB₂-reinforced aluminum matrix composites consolidated by ECAP process

Jafari,

Rajabi,

Montazeri-Pour

2024

Phys. Scr.

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In this research work, the effect of mechanical alloying time on the microstructural, physical, and mechanical properties of Al-ZrB2 metal matrix composites (MMCs) was evaluated. A mixture of Al and ZrB2 powders was mechanically alloyed at different times, and then the resulting composite powder was heated, consolidated and turned into bulk material by warm equal channel angular pressing (ECAP) at the temperature of 250°C. SEM micrographes indicate that the size of the obtained particles decreases by increasing the time of mechanical alloying up to 18 hours. However, after this time, the particle size has increased. By means of mechanical alloying for 18 hours, the average size of fine particles reached 823 nm, while coarse particles were 8 µm. The calculation of the size of crystallites by the use of XRD examination implys that the rate of crystallite size reduction after 12 hours of mechanical alloying is gradually reduced, and that is reached its lowest level after 18 hours. After that, increasing the time of mechanical alloying has led to an increase in the size of the crystallites and a decrease in the lattice strain. The Al-ZrB2 MMC bulk samples processed by the ECAP method, with an optimum amount of ZrB2 (5 wt.%) had a relative density, hardness, and ultimate shear strength of 99.3%, 170 HV, and 151 MPa, respectively, using powders which have been mechanically alloyed up to 24 hours.

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“…Because it limits the amount of foaming agent to be filled in between the plates and if excess material is placed in between the plates, chances of formation of tunnel defect is very common. 22,23 Thus, it is required to select any other method to mix the foaming agent in the substrate. Along with that, it is also required that the developed foam should have good properties like high strength-toweight ratio.…”

Section: Introductionmentioning

confidence: 99%

Effect of Process Parameters on Mechanical Properties of Aluminum Composite Foam Developed by Friction Stir Processing

Rathore¹,

Singh

Khan³

2021

Proceedings of the Institution of Mechanical Engineers, Part B:

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The underwater friction stir processing is used for development of aluminum metal matrix composite (AA2219-Y2O3) foam. For development of foam, holes with different diameter in the mid thickness of plate were filled with a mixture of TiH2 and aluminum powder and underwater friction stir processing was used to mix this mixture in aluminum metal matrix composite. Then precursors extracted from the processed zone and heated upto 650°C in a furnace for development of foam. The effect of diameter of hole, number of passes and the tool rotation direction has been studied on the foam cell size and static and dynamic compressive behavior of the foam. It is found that as the diameter of hole increases, the size of pores increases. The distribution of pores is better with higher number of passes and increasing the hole diameter. The quality of foam further improves by reversing the tool rotation direction. The developed foam has different pore size varies from 0.7 to 2.7 mm depends on the FSP parameters. Based on the size of pores and their distribution the relative density ranges from 0.1 to 0.78. The foam produced with 4 mm hole diameter has best static and dynamic compression properties.

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Densification of Al-Y2O3 composite powder by equal channel angular pressing

Cited by 19 publications

References 13 publications

Archives of Metallurgy and Materials

Archives of Metallurgy and Materials

Microstructure and properties of ZrB₂-reinforced aluminum matrix composites consolidated by ECAP process

Effect of Process Parameters on Mechanical Properties of Aluminum Composite Foam Developed by Friction Stir Processing

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Densification of Al-Y2O3 composite powder by equal channel angular pressing

Cited by 19 publications

References 13 publications

Archives of Metallurgy and Materials

Archives of Metallurgy and Materials

Microstructure and properties of ZrB2-reinforced aluminum matrix composites consolidated by ECAP process

Effect of Process Parameters on Mechanical Properties of Aluminum Composite Foam Developed by Friction Stir Processing

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Product

Resources

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Microstructure and properties of ZrB₂-reinforced aluminum matrix composites consolidated by ECAP process