Numerical Modeling of Frictional Stress in the Contact Zone of Direct Extrusion of Aluminum Alloys under Starved Lubrication

Tomar, Pankaj; Pandey, R. K.; Nath, Y.

doi:10.1007/s11837-013-0709-x

Cited by 2 publications

(1 citation statement)

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“…An efficient thermal analysis of inlet zone in hydrostatic extrusion is carried out by Tomar et al [16] for various operating parameters using Lobatto quardature technique and presented a regression formula for elevated operating conditions. Starvation effect of lubricant on interfacial friction is investigated by Tomar et al [17] for aluminum and aluminum alloys.…”

Section: Fig 1 Schematic View Of Hydrostatic Extrusion Processmentioning

confidence: 99%

Investigation of Friction Using Non-Newtonian Lubricant Model in Hydrostatic Extrusion of Tungsten Alloy

Tomar

2015

AMM

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Friction at die/billet interface is a complex phenomenon affected by various operating and process parameters in metal forming industries. In presence of lubricating layer at the interfacial contact friction effect is reduced and enhances tool life and surface quality of product. The lubricant viscosity is strongly dependent on pressure and temperature during deformation of hard material and an accurate prediction of lubricants viscosity leads to realistic results in the work zone. Therefore, the paper incorporates numerical simulation of friction at the die/billet interface in hydrostatic extrusion of tungsten alloy 93W for three different lubricants whose rheology is represented by a Non-Newtonian friction model. The billet heating effect is incorporated in the investigation and results show that the co-efficient of friction varies in a range (0.058 to 0.062) along the work zone for various lubricating conditions in hydrostatic extrusion process.

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Section: Fig 1 Schematic View Of Hydrostatic Extrusion Processmentioning

confidence: 99%