Plastic forming of the equal-channel angular pressing processed 6061 aluminum alloy

Kim, W.J.; Sa, Y.K.; Kim, H.K.; Yoon, U-Sok

doi:10.1016/j.msea.2007.10.069

Cited by 50 publications

(26 citation statements)

References 9 publications

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“…11a). This behavior was very similar to that found in Kim et al [36] results for an ECAPed AA6061 alloy at room temperature. Kawasaki et al [35] have concluded that for ECAPed pure Al, there is no additional grain refinement with the increase in the number of passes 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 11 (~1.3 μm).…”

Section: Microstructuresupporting

confidence: 91%

Structure and microstructure evolution of Al–Mg–Si alloy processed by equal-channel angular pressing

Khelfa

Rekik

Khitouni

et al. 2017

Int J Adv Manuf Technol

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An ultrafine grained Al-Mg-Si alloy was prepared by severe plastic deformation using the Equal Channel Angular Pressing (ECAP) method. Samples were ECAPed through a die with an inner angle of Φ=90º and outer arc of curvature of ψ= 37° from 1 to 12 ECAP passes at room temperature following route Bc. To analyze the evolution of the microstructure at increasing ECAP passes x-ray diffraction and Electron Backscatter Diffraction analyses were carried out. The results revealed two distinct processing regimes, namely: i) from 1 to 5 passes, the microstructure evolved from elongated grains and sub-grains to a rather equiaxed array of ultrafine grains and ii) from 5 to 12 passes where no change in the morphology and average grain size was noticed. In the overall behavior, the boundary misorientation angle and the fraction of high-angle boundaries increase rapidly up to 5 passes and at a lower rate from 5 to 12 passes. The crystallite size decreased down to about 45 nm with the increase in deformation. The influence of deformation on precipitate evolution in the Al-Mg-Si alloy was also studied by differential scanning calorimetry. A significant decrease in the peak temperature associated to the 50% of recrystallization was observed at increasing ECAP passes.

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Section: Microstructuresupporting

confidence: 91%

Structure and microstructure evolution of Al–Mg–Si alloy processed by equal-channel angular pressing

Khelfa

Rekik

Khitouni

et al. 2017

Int J Adv Manuf Technol

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“…17 Our findings are consistent with those reported in the literature, indicating that the hot ductility of equal-channel angular pressed AA6061 is two to four times greater than those of the unequal-channel angular pressed condition. 18 Second, the ductility of severe plastic deformed samples increases with temperature. The observed behavior can be attributed to the occurrence of recovery and recrystallization during the deformation of severely deformed materials.…”

Section: Elongation To Failurementioning

confidence: 99%

Modeling the Hot Ductility of AA6061 Aluminum Alloy After Severe Plastic Deformation

Khamei

Dehghani

Mahmudi

2015

JOM

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Solutionized AA6061 aluminum alloy was processed by equal-channel angular pressing followed by cold rolling. The hot ductility of the material was studied after severe plastic deformation. The hot tensile tests were carried out in the temperature range of 300-500°C and at the strain rates of 0.0005-0.01 s À1 . Depending on the temperature and strain rate, the applied strain level exhibited significant effects on the hot ductility, strain-rate sensitivity, and activation energy. It can be suggested that the possible mechanism dominated the hot deformation during tensile testing is dynamic recovery and dislocation creep. Constitutive equations were developed to model the hot ductility of the severe plastic deformed AA6061 alloy.

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“…In relation to the manufacturing of gears from ECAP-processed materials, research work from both Kim et al [12] and Luis Pérez et al [13] are noteworthy. From ECAP-processed AA6061 (twelve times using route Bc), Kim et al [12] manufacture a micro-gear by extrusion at temperature values of 443 K and 553 K. One of their most remarkable conclusions is that the extrusion process may be carried Cisar et al [22] manufacture a knuckle arm, which forms part of the steering system of an automobile, from ECAP-processed AZ31 magnesium alloy.…”

Section: Introductionmentioning

confidence: 99%

Design and Mechanical Properties Analysis of AA5083 Ultrafine Grained Cams

Salcedo

Luis

Luri

et al. 2017

Metals

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This present research work deals with the development of ultrafine grained cams obtained from previously ECAP (Equal Channel Angular Pressing)-processed material and manufactured by isothermal forging. The design and the manufacturing of the dies required for the isothermal forging of the cams are shown. Optimization techniques based on the combination of design of experiments, finite element and finite volume simulations are employed to develop the dies. A comparison is made between the mechanical properties obtained with the cams manufactured from material with no previous deformation and with those from previously SPD (Severe Plastic Deformation)-processed material. In addition, a comparative study between the experimental results and those obtained from the simulations is carried out. It has been demonstrated that it is possible to obtain ultrafine grained cams with an increase of 10.3% in the microhardness mean value as compared to that obtained from material with no previous deformation.

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Plastic forming of the equal-channel angular pressing processed 6061 aluminum alloy

Cited by 50 publications

References 9 publications

Structure and microstructure evolution of Al–Mg–Si alloy processed by equal-channel angular pressing

Structure and microstructure evolution of Al–Mg–Si alloy processed by equal-channel angular pressing

Modeling the Hot Ductility of AA6061 Aluminum Alloy After Severe Plastic Deformation

Design and Mechanical Properties Analysis of AA5083 Ultrafine Grained Cams

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