Friction factor, Load and Displacement Studies of AA6063 in forward Extrusion process with Equal Channel Angular Pressing (ECAP) Preprocess

Balasubramani, S.; Kumar, Naveen

doi:10.1016/j.matpr.2019.05.232

Cited by 2 publications

(1 citation statement)

References 5 publications

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“…Friction is a complex phenomenon with numerous key roles and applications in science and engineering. Prior knowledge of friction factor is also essential for several experimental-numerical studies [1][2][3][4][5][6][7] , industrial forming processes [8][9][10][11][12] and characterization material properties [12][13][14][15][16] . Solving friction's exact governing equations for a real transient process or its physical simulation is extremely complex.…”

Section: Introductionmentioning

confidence: 99%

A verified solution of friction factor in compression test based on its sample's shape changes

Khoddam

Fardi

Solhjoo

2021

International Journal of Mechanical Sciences

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The friction factor is a key input for "barrel compression test " and for a meaningful interpretation of the test data. Despite its widespread use, due to the complexity of the problem, there are very few solutions available for the test, let alone for the friction factor. Extended-Avitzur (EA) model has serious known limitations to calculate the friction factor. To estimate the friction factor more reliably, a closed-form solution of the friction factor has been proposed here. The solution is based on the "Exponential Profile Model " (EPM) and provides an instantaneous value for the friction factor. It simply relies on the sample's initial and deformed dimensions. Unlike existing experimental procedures, the proposed solution integrates the test results and friction factor identification based on a single set of experimental load-displacement-barreling data. Merits of the model and its solution were highlighted and compared to those of the conventional Cylindrical Profile Models (CPMs). A finite element model was developed as the reference to produce pseudo-experimental test data and to verify the presented solution. The deformation data were used in the EPM and the EA model to calculate the friction factors by each model and to compare them with the reference data as the benchmark. Contrary to EA's estimated friction factors, those identified by the EPM were in good agreement with the reference values. Recommendations were provided to identify a deformation zone at which the EPM's friction factor can be estimated meaningfully.

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Section: Introductionmentioning

confidence: 99%

A verified solution of friction factor in compression test based on its sample's shape changes

Khoddam

Fardi

Solhjoo

2021

International Journal of Mechanical Sciences

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Effects of lubricants and billet geometry on the extrusion of AA6063/5% SiCp composites

Veerasundaram¹,

Kalaichelvan

Ramasamy³

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part E:

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Lubricants are necessary for metal forming to avoid direct contact, adhesion, transfer, and scratches from materials and tools. It is also essential for increasing tool durability and reducing energy use. The work aims to study the effects of lubricants and billet geometry on the extrusion of AA6063/5% SiCp. The lubricants were used such as graphite, zinc stearate, and molybdenum disulphide. The friction factor has been determined by the lubricant effect and billet geometry. The simulation was done for the lubricated condition which was compared with experimental results. It was found that improved billet quality was obtained by the graphite-lubricated 12:8 configuration die profile. Also, the friction factor for the graphite-lubricated 12:8 configuration dies profile was 10.5% less compared to other configure profiles. Scanning electron microscopy was used to investigate the surface of the lubricated extruded component, and samples were examined utilizing energy-dispersive X-ray analyses.

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Friction factor, Load and Displacement Studies of AA6063 in forward Extrusion process with Equal Channel Angular Pressing (ECAP) Preprocess

Cited by 2 publications

References 5 publications

A verified solution of friction factor in compression test based on its sample's shape changes

A verified solution of friction factor in compression test based on its sample's shape changes

Effects of lubricants and billet geometry on the extrusion of AA6063/5% SiCp composites

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