Radial-shear rolling of high-strength aluminum alloys: Finite element simulation and analysis of microstructure and mechanical properties

Akopyan, Т. К.; Gamin, Yu. V.; Галкин, С. П.; Prosviryakov, A. S.; Алещенко, А. С.; Noshin, M.A.; Koshmin, A. N.; Фомин, А. В.

doi:10.1016/j.msea.2020.139424

Cited by 38 publications

(20 citation statements)

References 30 publications

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“…According to grain orientation maps (Fig. 3), the formation of so called gradient grained structure occurs similar to described earlier in study [18] for high-strength alloy of 7xxx series. The observed gradient structure is characterized by the near surface layer with ultrafine grained structure with size from 0.3 to 5 µm (average grain size is approx.…”

Section: Ebsd Microstructure Analysissupporting

confidence: 77%

“…6a. As can be seen the character of hardness change over cross-section is the same for all variants of rolling temperatures and corresponds to microstructure formed at RSR [15][16][17][18]. Microhardness has maximum values at the surface of the rod, then smoothly decrease towards the center and again increases in the axial zone.…”

Section: Mechanical Propertiesmentioning

confidence: 67%

“…The friction factor was chosen as a matter of RSR experience of aluminum alloys and coordination of rolling time in real process and modelling. Based on a number of experiments carried out earlier [16][17][18], the rolling time of a certain length bar was determined. In the simulation, a friction factor was selected that would provide the same rolling time as in the experiment to ensure the same slip.…”

Section: Model Used In Fem Simulationmentioning

confidence: 99%

“…As a result, the rods with a gradient functional structure were obtained. The authors [17,18] carried out the detailed analysis of temperature and deformation parameters of RSR based on FEM results and experimental rolling. The perspectivity for combination of piercing and RSR process for obtaining the pipes from copper alloys for electrical purposes is shown in [19].…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Microstructure evolution and property analysis of commercial pure Al alloy processed by radial-shear rolling

Gamin

Akopyan

Koshmin

et al. 2020

Archiv.Civ.Mech.Eng

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Section: Ebsd Microstructure Analysissupporting

confidence: 77%

Section: Mechanical Propertiesmentioning

confidence: 67%

Section: Model Used In Fem Simulationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Microstructure evolution and property analysis of commercial pure Al alloy processed by radial-shear rolling

Gamin

Akopyan

Koshmin

et al. 2020

Archiv.Civ.Mech.Eng

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“…The observed difference in particle size over the cross-section of workpiece is due to the natural gradient distribution of strains and stresses at RSR. Indeed, according to the previous studies [29,30], higher strains and stresses are observed near the surface of workpiece. For the regime 4 the about equivalent size of the particles over the cross-section of workpiece can be observed.…”

Section: Microstructure Characterization and Phase Analysismentioning

confidence: 59%

Effect of Process Parameters on the Microstructure and Mechanical Properties of Bars from Al-Cu-Mg Alloy Processed by Multipass Radial-Shear Rolling

Akopyan¹,

Gamin²,

Галкин³

et al. 2021

Preprint

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The study of microstructure and mechanical properties formation of A2024 alloy obtained by the multipass radial-shear rolling (RSR) method is discussed in this article. FEM simulation was carried out that made it possible to evaluate the influence degree of rolling temperature-velocity parameters on the strain state of material. It has been found the increase in rotary velocity of rolls significantly influences on the deformation heating of bar after RSR (predominantly in its surface layer). The combination of rolling temperature-velocity conditions at selection of deformation regime has complex effect on structure and properties formation. The analysis of sizes and distribution of phase particles has shown that the rolling at lower temperatures allowed to increase the mechanical strength due to the more intensive refinement of undissolved Fe-containing phase. The gradual decrease in the rolling temperature in each pass makes possible to achieve the high strength (UTS~430 MPa and YS~255 MPa) while maintaining the ductility level ~15%, that are comparable to ones obtained at some severe plastic deformation (SPD) methods.

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Numerical simulation of billet height-diameter ratio on magnesium alloy automobile wheel formed by back extrusion

Jiang

Ren

et al. 2022

Int J Adv Manuf Technol

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Magnesium alloy wheels are widely concerned for their satisfactory energy saving and emission reduction effects and increased driving comfort. However, the current single-step back extrusion (BE) forming process of magnesium alloy wheels uses a relatively small billet height-diameter ratio (HDR), which results in coarse grains and uneven grain size distribution of the spokes, seriously affecting the service performance of the wheel. A numerical model of the magnesium alloy wheel was constructed based on the actual single-step BE process of the magnesium alloy wheel in this study, and the effect of billet HDR on the physical field and dynamic recrystallization (DRX) grain size during the forming process of magnesium alloy wheel was explored through numerical simulation. Finding reveals that as the HDR of the billet increases, the overall effective strain of the wheel increases, the overall DRX volume fraction increases, and the grains are refined. When the HDR of the billet is greater than 1, the overall grain size distribution of the wheel tends to be stable. Compared with the traditional small HDR, when the billet HDR is greater than 1, the grain size at the spokes is reduced from the original 60~120μm to 30μm. During the forming process of the wheel, the upper rim is prone to cracking. With the increase of the HDR of the billet, the damage value at the upper rim of the wheel increases, that is, the cracking tendency at the upper rim increases. Simultaneously, the cracking tendency of the outer side of the rim increases with the HDR of the billet. Considering it comprehensively within the scope of this study, it is recommended to set the HDR of the wheel billet between 0.7 and 1.

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Radial-shear rolling of high-strength aluminum alloys: Finite element simulation and analysis of microstructure and mechanical properties

Cited by 38 publications

References 30 publications

Microstructure evolution and property analysis of commercial pure Al alloy processed by radial-shear rolling

Microstructure evolution and property analysis of commercial pure Al alloy processed by radial-shear rolling

Effect of Process Parameters on the Microstructure and Mechanical Properties of Bars from Al-Cu-Mg Alloy Processed by Multipass Radial-Shear Rolling

Numerical simulation of billet height-diameter ratio on magnesium alloy automobile wheel formed by back extrusion

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