Grain refinement in AZ31 magnesium alloy rod fabricated by extrusion-shearing severe plastic deformation process

Huang, Hongjun; Yang, Ming‐Bo; Deng, Ming

doi:10.1016/s1003-6326(11)60705-x

Cited by 27 publications

(10 citation statements)

References 13 publications

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“…The parameters for the simulations of the square-section channel of ECAP process When die channel angle was 90° and the value of the die corner angle were 15°, 26°, 37° and 52°respectively, it is brought into the equation (6) and the corresponding radius R can be calculated, they respectively were 2.79mm, 4.5mm, 6mm and 7.87mm.…”

Section: Tablementioning

confidence: 99%

“…magnesium and magnesium alloys Taylor coefficient is larger due to the hcp structure relative to the face-centered cubic and body centered cubic, so its k is larger, and the potential through grain refinement method to improve the magnesium alloy plastic of is much greater than the iron alloy, aluminum alloy, etc. [5,6].The reason why the grain finer material is high strength and hardness than the coarse grains of the material is mainly because of the relatively large area of grain boundaries of fine material [7].…”

Section: Introductionmentioning

confidence: 99%

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FE Simulation Investigation of Magnesium Alloy by Equal Channel Angular Processing

Zhang

Liu

et al. 2021

Preprint

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Magnesium alloy is one of the structure metals of great potential. The hcp structure makes its plasticity is poor at room temperature, which severely limits the development of magnesium alloy. Magnesium alloy plastic problem can be resolved through grain refinement method, and equal channel angular processing is one of the more effective methods of grain refinement. In this paper, two-dimensional dynamic simulation of equal channel angular processing for magnesium alloy were done with the finite element software. The deformation of magnesium alloy was analyzed when die angle and die corner angle were different. The results show that: in the main deformation zone, when die angles were different, the sample deformation in the horizontal direction is very uniform. But in the sample longitudinally direction, the greater the die angle, the more uniform the sample deformation. Die corner angle has no significant effect on the uniformity of the longitudinally deformation of the sample, but its affects the size of the dead zone and sample warpage.

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Section: Tablementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

FE Simulation Investigation of Magnesium Alloy by Equal Channel Angular Processing

Zhang

Liu

et al. 2021

Preprint

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show abstract

“…The simulation models consisted of 3 objects in the extrusion the billet, the die with an aperture diameter of 85 mm and a bearing length 0.02 of 20mm, and a rigid container. Both the container and the die regarded as rigid bodies, and the extrusion billet a rigidplastic material have been considered in present analyses 13 . Wrought magnesium alloyAZ31 was used as the billet material in computer simulations and the properties are list in Table 2.…”

Section: Finite Element Modelsmentioning

confidence: 99%

Extrusion-shear of AZ31 alloy billets with low temperature and high speed by using three-dimensional finite element modeling and experiments

et al. 2014

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A new kind of compound extrusion technology including direct extrusion and shears for AZ31 magnesium billets can cause plastic large deformations and high strain rates. A series of compressive tests have been done to obtain the stress-strain curves of AZ31 magnesium alloy. Three-dimensional (3D) thermo-mechanical coupled finite element modeling of forming magnesium alloy AZ31billets into small rods at certain high ram speed and low temperature by extrusion-shears have been carried out. The simulation model has been established and meshed based on symmetrical characteristic. Computed parameters including material characteristics for workpiece and die and process conditions consisting of initial billet temperature, extrusion ratio, channel angle and ram speed have been list. The evolution of temperature during extrusion-shear process, there are hardly any temperature gradients within the workpiece, but temperature in severe plastic deformation zone increase rapidly. Strain evolutions for inner billet are larger than those of border positions. The flow velocity distribution is uniform basically which avoid the extrusion cracks to a certain degree. Experiments show that the rods with good surface smoothness can be obtained by low temperature and high speed extrusion-shear, and the alloy grains are effectively refined by dynamic recrystallization (DRX).

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“…al. [10] for magnesium independent of each other. Their objective was to simplify the transferability from laboratory scale to production scale and transform the discontinuous to a continuous process.…”

Section: Introductionmentioning

confidence: 97%

Modification of the anisotropy and strength differential effect of extruded AZ31 by extrusion-shear

Jaehnke¹,

Gensch²,

Mueller³

2018

AIP Conference Proceedings

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Grain refinement in AZ31 magnesium alloy rod fabricated by extrusion-shearing severe plastic deformation process

Cited by 27 publications

References 13 publications

FE Simulation Investigation of Magnesium Alloy by Equal Channel Angular Processing

FE Simulation Investigation of Magnesium Alloy by Equal Channel Angular Processing

Extrusion-shear of AZ31 alloy billets with low temperature and high speed by using three-dimensional finite element modeling and experiments

Modification of the anisotropy and strength differential effect of extruded AZ31 by extrusion-shear

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