Analysis of radial-shear rolling process parameters of aluminum alloys based on FEM modeling

Gamin, Yu. V.; Koshmin, A. N.; Ta, Dinh Xuan

doi:10.1051/matecconf/202031511001

Cited by 5 publications

(4 citation statements)

References 22 publications

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“…Hence, the surface microstructure should be characterized by a smaller grain size than the central region. Research dealing with the estimation of the microstructure after three-high RSR, for instance [40], found two areas that could be identified in the billet after RSR: peripheral with a fine-grain structure and central with more coarse grains. This is visible in Figure 6b, where the relative increase in the accumulated strain was positive, and then it was negative.…”

Section: Resultsmentioning

confidence: 99%

“…Computer simulation, including FEM-based, is applied for the estimation of the stress-strain state parameters and temperature distribution through the rolled billet's volume during RSR [28][29][30][31][32]. Some research has been dedicated to the joint use of computer simulation and experimental RSR for different purposes: the prediction of a possible billet's fracture during RSR [11], the estimation of the features of the stressstrain state parameters' distribution during the stationary and nonstationary stages of RSR [33][34][35], research of the billet's microstructure and property formation [36][37][38][39], and the estimation of the stress-strain state parameters' distribution in the deformation zone during RSR [14,20,40,41]. It has been noted [11,35] that further investigations of three-high screw rolling are necessary because the billet's stress-strain state features and their influence on the billet's microstructure have not been completely detected.…”

Section: Introductionmentioning

confidence: 99%

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Simulation of the Kinematic Condition of Radial Shear Rolling and Estimation of Its Influence on a Titanium Billet Microstructure

Skripalenko

Karpov²,

Рогачев

et al. 2022

Materials

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The finite element method (FEM) computer simulation of the three-high radial shear rolling of Ti-6Al-4V alloy round billets was conducted using QForm software. The simulation was performed for the MISIS-100T rolling mill’s three passes according to the following rolling route: 76 mm (the initial billet diameter) →65 mm→55 mm→48 mm (the final billet diameter). The change in the total velocity values for the points on the radius of the 48 mm diameter billet was estimated while passing the rolls’ draft. The relative increase in the accumulated strain was estimated for the same points. Then, experimental shear rolling was performed. Grain sizes of the α- and β-phases were estimated in the cross section of the final billet at the stationary stage of rolling. The grain size distribution histograms for different phases were plotted. An area was found in the billet’s cross section in which the trend of change in the total velocity of the points changed. This area represented a neutral layer between the slowing peripheral segments of the billet and the accelerating central segments of the billet. Inside this neutral layer, the limits of the cylindrical surface radius value were estimated. Experimental radial shear rolling was performed to compare the experimental rolling results (the billet microstructure investigation) with the computer simulation results. The computer simulation obtained two estimations of the radius limits: 8–16 mm (based on the analysis of the total velocity change) and 12–16 mm (based on the accumulated strain’s relative increment change). The experimental rolling obtained two more estimations of the radius limits: 8.4–19.5 mm and 11.3–19.7 mm—based on the results of the microstructure investigation. It was confirmed that varying the kinematic and deformation parameters of radial shear rolling allows regulation of the thickness of the peripheral fine-grain layer and the diameter of the central coarse-grain layer of the rolled billets.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Simulation of the Kinematic Condition of Radial Shear Rolling and Estimation of Its Influence on a Titanium Billet Microstructure

Skripalenko

Karpov²,

Рогачев

et al. 2022

Materials

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“…While the decrease in temperature to 350 °С increases this value almost by 14%. In the central zone of bar occupied approximately 1/3 of the radius, where the effect of strain rate intensity is minimal [26,27], the equivalent strain parameter is mainly determined by elongation in a given section (by reducing its area).…”

Section: Deformation Parameters Analysismentioning

confidence: 99%

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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“…To study machinability and to determine the optimal parameters of hot deformation for some metals and alloys, the test conditions in laboratory. For example, during radial-shear rolling (RSR), the temperature and deformation-rate undergo zonal changes over a wide range (0.1-100 sec) -1 depending on the tool speed, reduction, and tool design [7]. This fact is indicative of the need of finding the optimal deformation parameters for closeto-industrial conditions.…”

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confidence: 99%

Influence of Radial-Shear Rolling Conditions on the Metal Consumption Rate and Properties of D16 Aluminum Alloy Rods

et al. 2021

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The effect of five cases of temperature-and-speed conditions in radial-shear rolling (RSR) of D16 alloy is analyzed. The temperature of the rod after each pass is obtained from the simulation results. With decrease in the heating temperature of the billet, the self-heating temperature of the rod during RSR increases. Depending on the selected temperature, rolling speed, reduction per pass, and rod dimensions, the temperature change relative to the initial heating can be more than 100 °C. The length and volume of the back-end defect are calculated for each of the temperature-and-speed conditions. With increase in the elongation ratio, the length of the back-end defect increases, and its volume decreases. The smallest back-end defect is observed in rods produced gradually decreasing the rolling temperature in each pass (for a 6 m rod, the scrap losses are 2.2% of the volume of rolled metal). For one of the temperature-andspeed conditions, the specific deformation energy consumption that does not exceed 24-35% of the total energy consumption is obtained. The rods produced by RSR have better strength and plasticity (σ B = 452-486 MPa, σ y = 262-290 MPa, δ = 13.0-16.5%) than those required by the GOST 21488-97 State Standard.

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Analysis of radial-shear rolling process parameters of aluminum alloys based on FEM modeling

Cited by 5 publications

References 22 publications

Simulation of the Kinematic Condition of Radial Shear Rolling and Estimation of Its Influence on a Titanium Billet Microstructure

Simulation of the Kinematic Condition of Radial Shear Rolling and Estimation of Its Influence on a Titanium Billet Microstructure

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

Influence of Radial-Shear Rolling Conditions on the Metal Consumption Rate and Properties of D16 Aluminum Alloy Rods

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