Modelling of microstructure evolution during hot rolling of AA5083 using an internal state variable approach integrated into an FE model

Ahmed, Haitham M.; Wells, Mary A.; Maijer, Daan M.; Howes, Belinda; Winden, M.R. van der

doi:10.1016/j.msea.2004.08.045

Cited by 50 publications

(34 citation statements)

References 24 publications

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“…The implicit two-dimensional model with rigid rolls has been adapted from a previously developed coupled thermal-mechanical model for conventional symmetric rolling. [19] The starting uniformly meshed sheet was constructed from 20, fournode quadrilateral plane stress elements. The model geometry has been taken to match that of the experimental setup, including the inclusion of the mechanical response of AA5754 at large strains, as described by Go et al [20] The contact between rolls and the material surface has been modeled assuming a Coloumb friction law with a friction coefficient l = 0.1 unless otherwise noted.…”

Section: A Experimentalmentioning

confidence: 99%

Deformation Geometry and Through-Thickness Strain Gradients in Asymmetric Rolling

Roumina

Sinclair

2008

Metall Mater Trans A

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Experiments and simulations focusing on cold rolling under conditions where the work roll velocities are different (asymmetric rolling) have been performed to provide a basic framework for understanding the effects of the roll velocity ratio and deformation geometry on through thickness shear strain development. It is shown that deformation geometry, controlled by varying the reduction per pass, has a significant impact on the through thickness shear strain gradients at a given level of asymmetry. Large reductions per pass lead to more uniform through thickness shear strains, but lower overall shear strain magnitudes compared to rolling conditions involving small reductions per pass. Moreover, the results show that a critical value of the roll velocity ratio exists, for a fixed set of rolling conditions, above which the shear strains induced by asymmetric rolling remain unchanged. This is interpreted based on the relative importance of geometrically induced shear strains and those arising from frictional effects. In this context, the position of the neutral points plays a vital role.

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Section: A Experimentalmentioning

confidence: 99%

Deformation Geometry and Through-Thickness Strain Gradients in Asymmetric Rolling

Roumina

Sinclair

2008

Metall Mater Trans A

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“…[1] One method of understanding microstructure development is to develop physically based mathematical models that predict the microstructure evolution at each stage of the process and thereby achieve a greater understanding of the effect of the process variables on the properties of the final product. Although modeling of single pass hot rolling of aluminum alloys has been studied previously, [2,3] the reported work in modeling of multipass hot rolling is limited in the literature, such as the approaches reported by Reyes et al and Vatne et al, for example. [4,5] Multipass hot rolling is particularly important in situations where various levels of recrystallization may occur between passes.…”

Section: Introductionmentioning

confidence: 99%

“…[2] Ahmed et al recently presented a successful integration of this model and experimental validation for single-pass rolling conditions. [3] The next step is to combine a state variable-based microstructure model with FE analysis for industrial-scale multipass rolling of aluminum alloys.…”

Section: Introductionmentioning

confidence: 99%

Mathematical Modeling of Multipass Hot Deformation of Aluminum Alloy AA5083—Model Development and Validation

Ahmed

Wells

Maijer

et al. 2007

Metall Mater Trans A

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Hot rolling, a critical step in the manufacturing of sheet products, influences the final sheet properties based on the microstructure evolution during this operation. A comprehensive mathematical model of the hot rolling process for aluminum alloys has been developed. This article outlines the development of a two-dimensional (2-D) mathematical model to simulate multipass hot rolling using the commercial finite element (FE) package, ABAQUS. Microstructure evolution during multipass rolling was modeled using a physically based approach to predict the stored energy and the resulting microstructure for an AA5083 aluminum alloy. The stored energy in the material between passes is quantified using a rule-of-mixtures approach based on the fraction of the material that is recrystallized. An extensive experimental program was undertaken to validate the model using Corus' single-stand reversible rolling facility located in IJmuiden, The Netherlands. Overall, the model was able to simulate the thermomechanical history experienced during multipass hot rolling reasonably well based on comparison to temperature and rolling load measurements. The model was also able to predict the fraction recrystallized through the thickness of the strip reasonably well, but the grain size predictions were consistently low.

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“…It is worth noting that this approach involves an evolution law for the subgrain misorientation, taking the misorientation as an averaged quantity. This formulation is used in simulation of SRX during thermo-mechanical processing in [73] and in relation to hot rolling in [74,75]. The formulation is also discussed in the review paper [23].…”

Section: Continuum Mechanical Modelsmentioning

confidence: 99%

Approaches to Modeling of Recrystallization

Hallberg

2011

Metals

153

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Control of the material microstructure in terms of the grain size is a key component in tailoring material properties of metals and alloys and in creating functionally graded materials. To exert this control, reliable and efficient modeling and simulation of the recrystallization process whereby the grain size evolves is vital. The present contribution is a review paper, summarizing the current status of various approaches to modeling grain refinement due to recrystallization. The underlying mechanisms of recrystallization are briefly recollected and different simulation methods are discussed. Analytical and empirical models, continuum mechanical models and discrete methods as well as phase field, vertex and level set models of recrystallization will be considered. Such numerical methods have been reviewed previously, but with the present focus on recrystallization modeling and with a rapidly increasing amount of related publications, an updated review is called for. Advantages and disadvantages of the different methods are discussed in terms of applicability, underlying assumptions, physical relevance, implementation issues and computational efficiency.

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Modelling of microstructure evolution during hot rolling of AA5083 using an internal state variable approach integrated into an FE model

Cited by 50 publications

References 24 publications

Deformation Geometry and Through-Thickness Strain Gradients in Asymmetric Rolling

Deformation Geometry and Through-Thickness Strain Gradients in Asymmetric Rolling

Mathematical Modeling of Multipass Hot Deformation of Aluminum Alloy AA5083—Model Development and Validation

Approaches to Modeling of Recrystallization

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