A comparison of some deformation models in axisymmetric extrusion

Altan, Şenol; Antar, Nalan; GÜLTEKİN, Elif

doi:10.1016/0924-0136(92)90212-b

Cited by 8 publications

(3 citation statements)

References 2 publications

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“…Based on the upper bound theorem, Avitzur [29] and Altan et al [30] proposed analytical flow line functions for axisymmetric extrusion in a cylindrical die. The model introduced by Altan et al [30] was already successfully used for drawing of pearlitic steel [30] and has also been adopted in the present study.…”

Section: Polycrystal Modellingmentioning

confidence: 99%

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Texture evolution and grain refinement of ultrafine-grained copper during micro-extrusion

Tóth²,

Lapovok

et al. 2010

Philosophical Magazine

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Samples of oxygen-free high conductivity (OFHC) coarse-grained (CG) and ultrafine-grained (UFG) copper were micro-extruded to an equivalent strain of 2.8 in one pass at room temperature. Samples of the OFHC copper were annealed at 650 C for 2 h to produce CG copper. Some samples were subsequently processed by equal channel angular pressing of eight passes, route Bc, at room temperature to produce the UFG material. Crystallographic texture and misorientation distributions were obtained locally from EBSD mappings at different radial positions after micro-extrusion. To model the strain path during micro-extrusion, the analytic flow line model of Altan et al. [J Mater. Process. Tech. 33 (1992) p.263] was used and also validated by finite element calculations. Modelling was carried out using the viscoplastic self-consistent (VPSC) model and a recently developed grain refinement model. The results showed large texture variations along the cross-section of the extruded sample for both UFG and CG copper. These cyclic drawing textures in UFG copper were simulated in good agreement with experiments using the presented modelling framework.

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Section: Polycrystal Modellingmentioning

confidence: 99%

“…The model introduced by Altan et al [30] was already successfully used for drawing of pearlitic steel [30] and has also been adopted in the present study. The approach is based on a third order flow line function.…”

Section: Polycrystal Modellingmentioning

confidence: 99%

Texture evolution and grain refinement of ultrafine-grained copper during micro-extrusion

Tóth²,

Lapovok

et al. 2010

Philosophical Magazine

View full text Add to dashboard Cite

show abstract

“…This effect can be faithfully modelled with the help of finite element calculations [1] but the use of suitable analytical flow line functions can lead to equivalent results with much less complexity. Such efforts have been done earlier by Avitzur [2] and by Altan et al [3]. Heizmann et al [4] have also used analytical flow functions to model the drawing process.…”

Section: Introductionmentioning

confidence: 99%

Simulation of Texture Development of Plane Carbon Steel in Multipass Rolling Using Analytical Flow Function

Beausir

Tóth²,

Bouaziz

2005

MSF

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Using a simple analytical flow function, an analysis of the deformation field in symmetrical rolling has been carried out. The so-obtained varying velocity gradient is incorporated into the Taylor polycrystal plasticity model to simulate the development of the deformation texture. The initial discontinuity in the deformation field of the entering material element on the flow lines is also taken into account. Multiple passes of the material is simulated. A strong texture gradient is obtained in good agreement with experiments carried out for rolling of plane carbon steel. It is shown that the shear component of the texture is strongly related to the nature of multiple passes of the rolling operation.

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A deformation model for tube extrusion

Altan

1994

Journal of Materials Processing Technology

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A comparison of some deformation models in axisymmetric extrusion

Cited by 8 publications

References 2 publications

Texture evolution and grain refinement of ultrafine-grained copper during micro-extrusion

Texture evolution and grain refinement of ultrafine-grained copper during micro-extrusion

Simulation of Texture Development of Plane Carbon Steel in Multipass Rolling Using Analytical Flow Function

A deformation model for tube extrusion

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