Creation of 3D Model of Stainless-Steel Billet’s Grain after Three-High Screw Rolling

Skripalenko, M. M.; Рогачев, С. О.; Романцев, Б. А.; Галкин, С. П.; Капуткина, Л. М.; Skripalenko, M. N.; Danilin, Andrei Vladimirovich; Fadeev, Viktor A.

doi:10.3390/ma15030995

Cited by 3 publications

(4 citation statements)

References 24 publications

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“…Nevertheless, the hardness change patterns observed as a result of the present research have been identified for other screw rolling temperature and deformation regimes and for other materials, such as titanium alloy [30], steels [29,31], nickel alloy [32] and magnesium alloy [33]. Microstructure twist, as illustrated in Figure 10b,c, was identified for the three-high screw rolling of commercial pure aluminum billet at completely different temperatures from the current study temperature and deformation regimes [36], three-high screw rolling of AISI 1020 steel billet [37], and of AISI 321 steel billet [36]. These data indicate that stress-strain influences the microstructure and hardness formation substantially (independently form the regimes and rolled billet material), and its effect should be one of the key issues for examination in future research into screw rolling and RSR processes.…”

Section: Resultsmentioning

confidence: 63%

Research of Three-High Screw Rolling of Aluminum Billets with Copper Inserts at Different Rolls Feed Angles

Skripalenko,

Rogachev,

Bazhenov

et al. 2023

Metals

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Three-high screw-rolling of aluminum alloy ingots was carried out at 12- and 20-degrees rolls feed angles. The ingots had two copper, cylindrical inserts oriented along the ingot axis: the center of one insert coincided with the ingot’s center, and the center of the other insert coincided with the ingot’s half-radius. The effect of the rolls feed angle value on the aluminum and copper microstructure as well as the hardness formation was established. X-ray study and three-dimensional modeling allowed the copper insert twisting angle to be estimated along the rolled billet axis. It also allowed detection of the number of breaks of the insert located in the ingot’s center and the insert located in the ingot’s half-radius depending on the rolls feed angle value.

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Section: Resultsmentioning

confidence: 63%

Research of Three-High Screw Rolling of Aluminum Billets with Copper Inserts at Different Rolls Feed Angles

Skripalenko,

Rogachev,

Bazhenov

et al. 2023

Metals

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“…However, at present, the precise expressions for the temperature dependence of elastic moduli are not known for all materials. Therefore, most authors continue to use the Sellars expression in the form (2), in this case calling the quantity Q the "apparent" activation energy.…”

Section: Resultsmentioning

confidence: 99%

“…Austenitic stainless steels are widely used in the chemical industry, thermal and nuclear power, and medical and cryogenic engineering [1]. The production process of semi-finished products and final products from these steels usually includes the stage of hot deformation via rolling, forging, or extrusion [2][3][4].…”

Section: Introductionmentioning

confidence: 99%

Study on the Hot Deformation Behavior of Stainless Steel AISI 321

et al. 2022

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In this study, the hot deformation behavior of austenitic Ti-modified AISI 321 steel with a relatively high content of carbon (0.07 wt.%) and titanium (0.50 wt.%) was studied in the temperature range of 1000–1280 °C and strain rates in the range of 0.01–1 s−1. Hot deformation was carried out with uniaxial compression of cylindrical specimens on a Gleeble 3800 thermomechanical simulator. It is shown that the flow stress increased with a decrease in the deformation temperature and an increase in the strain rate. The shape of the stress-strain curves indicates that, at high temperatures and low strain rates, the hot deformation of AISI 321 steel was accompanied by dynamic recrystallization. The passage of dynamic recrystallization was confirmed by microstructural studies. Hyperbolic sine type of constitutive equation with deformation activation energy Q = 444.2 kJ·mol−1 was established by analyzing the experimental flow stresses. The power-law dependences of the critical strain necessary for the onset of dynamic recrystallization and the size of recrystallized grains on the Zener–Hollomon parameter were established. The value of the parameter Z = 5.6 × 1015 was determined, above which the dynamic recrystallization was abruptly suppressed in the steel under study. It is speculated that the suppression of dynamic recrystallization occurs due to dispersed precipitates of titanium carbonitrides.

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“…It is important to develop a technique to estimate the size of this neutral layer using both the stress-strain state and the kinematic parameters' distribution along with the microstructure features. It is also relevant that the RSR parameters directly influence the microstructure, considering the results in [44,45].…”

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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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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Creation of 3D Model of Stainless-Steel Billet’s Grain after Three-High Screw Rolling

Cited by 3 publications

References 24 publications

Research of Three-High Screw Rolling of Aluminum Billets with Copper Inserts at Different Rolls Feed Angles

Research of Three-High Screw Rolling of Aluminum Billets with Copper Inserts at Different Rolls Feed Angles

Study on the Hot Deformation Behavior of Stainless Steel AISI 321

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

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