Viscoplastic Self-consistent Modeling of the Through-Thickness Texture of a Hot-Rolled Al-Mg-Si Plate

Falkinger, Georg; Šimon, Peter; Mitsche, Stefan

doi:10.1007/s11661-020-05743-y

Cited by 13 publications

(7 citation statements)

References 54 publications

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“…Weiland and Hirsch [4] found a strengthening of the brass component and a stable cube component after hot rolling of an Al-Mn-Mg alloy at 480 • C to different degrees of deformation. A similar behavior was found in a wide variety of alloys such as Al-Mg [5], Al-Mg-Zn [6], Al-Cu [6][7][8] and Al-Mg-Si alloys [9]. The mechanism which controls the temperature dependence of texture evolution has been found to be the activation of non-octahedral slip modes at elevated temperatures [10,11].…”

Section: Introductionsupporting

confidence: 70%

“…They account for slip on all non-octahedral systems and assume a typical value for the rate-sensitivity exponent. Similar values have been used for Al-Mg-Si alloys in [9,19]. The other three sets provide temperature dependent model parameters.…”

Section: Model Parametersmentioning

confidence: 99%

“…Most of the studies use a rate-sensitivity exponent of 10 [18, 19] or vary the exponent to achieve agreement with experimental textures. An overview of modeling parameters used in the literature is provided in [9]. Maurice and Driver [15] performed a parametric study and make explicit recommendations on model parameters: they recommend quasi pencil glide, i.e.…”

Section: Introductionmentioning

confidence: 99%

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Numerical investigation of the effect of rate-sensitivity, non-octahedral slip and grain shape on texture evolution during hot rolling of aluminum alloys

Falkinger¹,

Mitsche²

2020

Modelling Simul. Mater. Sci. Eng.

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Based on texture simulations with a viscoplastic self-consistent polycrystal algorithm, this contribution presents a comprehensive investigation of the effect of the rate-sensitivity exponent, the relative strength of non-octahedral slip modes as well as the grain shape on texture evolution. The simulations are validated with texture measurements of samples from the industrial hot rolling process at different rolling reductions. Simulated textures at different hot rolling temperatures are compared with experimental findings from the literature. The present investigation indicates, that texture simulations must include three non-octahedral slip systems, use temperature dependent rate-sensitivity exponents and account for the evolution of grain shape.

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Section: Introductionsupporting

confidence: 70%

Section: Model Parametersmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Numerical investigation of the effect of rate-sensitivity, non-octahedral slip and grain shape on texture evolution during hot rolling of aluminum alloys

Falkinger¹,

Mitsche²

2020

Modelling Simul. Mater. Sci. Eng.

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“…Both the strain rate sensitivity and the critical stresses of the nonoctahedral slip systems depend on the temperature. Several values have been previously suggested in the literature (Falkinger et al, 2020). Typically, the relative strengths of the nonoctahedral slips with respect to the octahedral slips are within the range of 0.75-1.5, the strain-rate sensitivity varies from 0.1 to 0.3, see e.g., (Perocheau et al, 1998;Falkinger et al, 2020).…”

Section: Rate-sensitive Models With Both Octahedral and Nonoctahedralmentioning

confidence: 99%

Deformation Texture Evolution in Flat Profile AlMgSi Extrusions: Experiments, FEM, and Crystal Plasticity Modeling

et al. 2021

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In the present work, the deformation textures during flat profile extrusion from round billets of an AA6063 and an AA6082 aluminium alloy have been numerically modeled by coupling FEM flow simulations and crystal plasticity simulations and compared to experimentally measured textures obtained by electron back-scatter diffraction (EBSD). The AA6063 alloy was extruded at a relatively low temperature (350°C), while the AA6082 alloy, containing dispersoids that prevent recrystallization, was extruded at a higher temperature (500°C). Both alloys were water quenched at the exit of the die, to maintain the deformation texture after extrusion. In the center of the profiles, both alloys exhibit a conventional β-fiber texture and the Cube component, which was significantly stronger at the highest extrusion temperature. The classical full-constraint (FC)-Taylor and the Alamel grain cluster model were employed for the texture predictions. Both models were implemented using the regularized single crystal yield surface. This approach enables activation of any number and type of slip systems, as well as accounting for strain rate sensitivity, which are important at 350°C and 500°C. The strength of the nonoctahedral slips and the strain-rate sensitivity were varied by a global optimization algorithm. At 350°C, a good fit could be obtained both with the FC Taylor and the Alamel model, although the Alamel model clearly performs the best. However, even with rate sensitivity and nonoctahedral slip systems invoked, none of the models are capable of predicting the strong Cube component observed experimentally at 500°C.

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“…The addition of shear forces to plane strain compression affects the activation of slip systems and, in turn, the changes in crystallographic textures. In hot rolling, where non-octahedral slip systems may be activated, Falkinger et al [3] reported that the presence of a high shear strain due to increased friction between the roll and metal surface (i.e., a high F RD-ND ) strengthens rotated cube and reduces the fraction of rolling texture components (Brass, S, and Copper), which dominate at the sheet center where the loading is in the form of plane strain compression. The texture at the center of the metal strip is characterized by rolling components pertaining to the b fiber.…”

Section: Introductionmentioning

confidence: 99%

Simulations of Texture Evolution in the Near-Surface Region During Aluminum Rolling

Cantergiani,

Riedel,

Karhausen

et al. 2024

Metall Mater Trans A

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Prediction of texture changes during cold rolling is important because they affect the recrystallization and anisotropy of an aluminum sheet during successive forming steps. During cold rolling of aluminum alloys, the through-thickness textural change in the subsurface layer depends heavily on the shear stresses exerted on the material. The intensity of this shear stress is determined by the value of and change in the coefficient of friction as the contact length between the rolls and metallic sheet changes. The quality of the texture prediction under constant and variable coefficients of friction are assessed for three established texture models: the grain interaction (GIA) model, the viscoplastic self-consistent (VPSC) approach, and the full-field crystal plasticity Düsseldorf Advanced Material Simulation Kit (DAMASK) code. The simulation results are compared with subsurface layer textures obtained from conducting experimental cold-rolling trials on an aluminum alloy, which are designed to maximize shear in a single rolling pass. The formulation of a variable coefficient of friction is crucial for ensuring both the reasonable prediction of rolling forces and changes in texture. GIA and DAMASK yield the best texture prediction results for a variable coefficient of friction model.

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Viscoplastic Self-consistent Modeling of the Through-Thickness Texture of a Hot-Rolled Al-Mg-Si Plate

Cited by 13 publications

References 54 publications

Numerical investigation of the effect of rate-sensitivity, non-octahedral slip and grain shape on texture evolution during hot rolling of aluminum alloys

Numerical investigation of the effect of rate-sensitivity, non-octahedral slip and grain shape on texture evolution during hot rolling of aluminum alloys

Deformation Texture Evolution in Flat Profile AlMgSi Extrusions: Experiments, FEM, and Crystal Plasticity Modeling

Simulations of Texture Evolution in the Near-Surface Region During Aluminum Rolling

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