A finite element study of the temperature rise during equal channel angular pressing

Pei, Qing‐Xiang; Hu, B.H.; Lu, C.; Wang, Y.Y.

doi:10.1016/s1359-6462(03)00284-7

Cited by 51 publications

(24 citation statements)

References 14 publications

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“…Typically, direct experimental measurements showed that the temperature may rise by ~70 K in a high strength aluminum alloy when processing by ECAP [57] and this was subsequently confirmed using finite element modeling [58] and a heat transfer analysis [59].…”

Section: Work Hardening and Flow Softeningmentioning

confidence: 93%

Effect of grain size on compressive behaviour of titanium at different strain rates

Zhang¹,

Wang²,

Zhilyaev³

et al. 2015

Materials Science and Engineering: A

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Abstract:An investigation was conducted to evaluate the dependence on grain size of the compressive deformation of commercial purity (CP) Ti. Tests were performed at room temperature using grain sizes from coarse-grained CG (20 m) to ultrafine-grained UFG (500 nm) and nanocrystalline NC (90 nm) with testing strain rates in the range from 0.01 to 10 s -1 .The results show the flow stress and the strain rate sensitivity of CP Ti increase with decreasing grain size. Work hardening dominates at all strain rates in CG Ti but it balances with flow softening at 0.01 and 0.1 s -1 in UFG and NC Ti and there is obvious flow softening in these two materials at 10 s -1 .

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Section: Work Hardening and Flow Softeningmentioning

confidence: 93%

Effect of grain size on compressive behaviour of titanium at different strain rates

Zhang¹,

Wang²,

Zhilyaev³

et al. 2015

Materials Science and Engineering: A

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“…[29] For the canned compact under investigation, as seen in Figure 12, the largest temperature buildup for the billet is in the compact. The can is considerably cooler as it is in contact with the die.…”

Section: Temperaturementioning

confidence: 97%

Equal Channel Angular Pressing of Canned 2124-Al Compacts: Processing, Experiments, and Modeling

Elkhodary

Salem

Zikry

2008

Metall Mater Trans A

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A detailed experimental and computational investigation of the influence of equal channel angular pressing (ECAP) on the microstructure and properties of precompacted 2124-Al nanostructured powder, canned in copper, was conducted. Measurements and observations were obtained by densitometry and optical, scanning, and transmission electron microscopy. Based on experimental observations, it was found that hot compacts subjected to a single ECAP pass had significant microstructural refinement and subgrain formation, and significant density changes were not attained. Green compacts, on the other hand, were observed to lose coherency under ECAP. Three-dimensional finite element modeling of the ECAP process was also conducted to further elucidate the evolution of the extrusion process, and to understand how it affects plastic strains, porosity, and thermal distributions.

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“…The difference in the temperature rise in different parts of the work-piece has several reasons. First, during the deformation, heat transfers from the deformed part to the un-deformed part of the work-piece that makes the later to be deformed at higher temperature and causes more temperature rise in those parts 33 . Second, die temperature increases by the deformed part, and then the undeformed part is deformed in a pre-heated die that causes less heat loss and more temperature rise 33 .…”

Section: Temperature Contours In Work-piece and Diementioning

confidence: 99%

“…Some analytical models are developed to predict the average temperature rise in ECAP 32 . However, FEM may predict the temperature rise in various points of the billet [33][34][35] . Similarly, FEM could be successfully used to predict the induced strain, damage and temperature rise in HPT 36 .…”

Section: Introductionmentioning

confidence: 99%

An Investigation on the Deformation Heating in Billet and Die During Equal-Channel Angular Pressing and High-Pressure Torsion

Karami

2016

Mat. Res.

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This work aims to investigate the temperature rise in Aluminum alloy 6061 due to deformation heating in equal channel angular pressing (ECAP) and high-pressure torsion (HPT) processes using finite element method. The roles of various parameters are investigated and the heating of ECAP die due to billet deformation is included in the simulations. The results show that while the work-piece moves in the exit channel, the generated heat is transferred to die via conduction and therefore the temperature isosurfaces in die are extended in the direction of inlet and exit channels. The dependency of maximum work-piece temperature to velocity is more than its dependency to friction. Increasing the plunger velocity increases the difference between maximum and minimum temperatures. Additionally, the maximum work-piece temperature is attained at the deformation zone. The temperature rise in HPT is less than ECAP due to the small size of the HPT work-piece compared to ECAP. Not only the work-piece size, but also the good heat conduction of aluminum makes the temperature distribution roughly uniform in HPT.

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A finite element study of the temperature rise during equal channel angular pressing

Cited by 51 publications

References 14 publications

Effect of grain size on compressive behaviour of titanium at different strain rates

Effect of grain size on compressive behaviour of titanium at different strain rates

Equal Channel Angular Pressing of Canned 2124-Al Compacts: Processing, Experiments, and Modeling

An Investigation on the Deformation Heating in Billet and Die During Equal-Channel Angular Pressing and High-Pressure Torsion

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