A Computationally Efficient Multiscale, Multi-Phase Modeling Approach Based on CPFEM to Assess the Effect of Second Phase Particles on Mechanical Properties

Asgharzadeh, Amir; Park, Taejoon; Tiji, Sobhan Nazari; Pourboghrat, Farhang

doi:10.3390/cryst13081199

“…In the work of Asgharzadeh et al [12], CPFEM was applied by an RVE model for a low carbon steel. Their focus was on the effect of second phase particles on the mechanical properties.…”

Section: Of 12mentioning

confidence: 99%

Modelling of Texture Development during Metal Forming Using FE-VPSC

Kronsteiner,

Theil,

Ott

et al. 2024

Preprint

0

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In directional forming processes such as rolling and extrusion, the microstructure is strongly elongated in the forming direction. This results in a preferred alignment of the crystal orientations of the initially randomly oriented grains. These preferred orientations – the texture – and elongations of the grains are the cause of the material anisotropy. This anisotropy leads to phenomena such as earing, which occur during further forming processes, e.g., during deep drawing of sheet metal. Considering anisotropic properties in numerical simulations allows to investigate the effects of texture-dependent defects in forming processes and the development of possible solutions. Purely phenomenological models for modelling anisotropy work by fitting material parameters or applying measured R-values in experiments which are applied to all elements of the part and remain constant over the duration of the simulation. In contrast, methods such as the Visco-Plastic Self-Consistent (VPSC) model, which has been used in this work, provide a deeper insight into the development of the material microstructure. By experimentally measuring the initial texture and using it as an initial condition for the simulations, it is possible to predict the evolution of the microstructure and the resulting effect on the mechanical properties during forming operations. The results of the simulations with VPSC show good qualitative agreement with tests typically used for rolled stock.

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“…A number of studies address the simulation of particle distributions contained in a statistically similar representative volume element (SSRVE). Asgharzadeh et al [24] used the CPFEM modelling technique to include half a million second-phase particles, but with only one integration point each, to simulate a tensile test of low-carbon steel. However, their use of a high-resolution CPFEM to model the influence of the particles can hardly be justified, as it was conducted without the spatial resolution of each particle and without GND mechanisms that would be expected for submicron secondary particles.…”

Section: Introductionmentioning

confidence: 99%

A Full-Field Crystal Plasticity Study on the Bauschinger Effect Caused by Non-Shearable Particles and Voids in Aluminium Single Crystals

Aria,

Holmedal,

Mánik

et al. 2024

Metals

2

0

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In the present work, the goal is to use two-scale simulations to be incorporated into the full-field open software DAMASK crystal plasticity framework, in relation to the Bauschinger effect caused by the composite effect of the presence of second-phase particles with surrounding deformation zones. The idea is to achieve this by including a back stress of the critical resolved shear stress in a single-phase simulation, as an alternative to explicitly resolving the second-phase particles in the system. The back stress model is calibrated to the volume-averaged behaviour of detailed crystal plasticity simulations with the presence of hard, non-shearable spherical particles or voids. A simplified particle-scale model with a periodic box containing only one of the spherical particles in the crystal is considered. Applying periodic boundary conditions corresponds to a uniform regular distribution of particles or voids in the crystal. This serves as an idealised approximation of a particle distribution with the given mean size and particle volume fraction. The Bauschinger effect is investigated by simulating tensile–compression tests with 5% and 10% volume fractions of particles and with 1%, 2%, and 5% pre-strain. It is observed that an increasing volume fraction increases the Bauschinger effect, both for the cases with particles and with voids. However, increasing the pre-strain only increases the Bauschinger effect for the case with particles and not for the case with voids. The model with back stress of the critical resolved shear stress, but without the detailed particle simulation, can be fitted to provide reasonably close results for the volume-averaged response of the detailed simulations.

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“…In the work of Asgharzadeh et al [12], the CPFEM was applied by an RVE model to a low-carbon steel. Their focus was on the effect of second-phase particles on the mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

Modelling of Texture Development during Metal Forming Using FE-VPSC

Kronsteiner,

Theil,

Ott

et al. 2024

Preprint

0

View full text Add to dashboard Cite

In directional forming processes such as rolling and extrusion, the microstructure is strongly elongated in the forming direction. This results in a preferred alignment of the crystal orientations of the initially randomly oriented grains. These preferred orientations – the texture – and elongations of the grains are the cause of the material anisotropy. This anisotropy leads to phenomena such as earing, which occur during further forming processes, e.g., during deep drawing of sheet metal. Considering anisotropic properties in numerical simulations allows to investigate the effects of texture-dependent defects in forming processes and the development of possible solutions. Purely phenomenological models for modelling anisotropy work by fitting material parameters or applying measured R-values in experiments which are applied to all elements of the part and remain constant over the duration of the simulation. In contrast, methods such as the Visco-Plastic Self-Consistent (VPSC) model, which has been used in this work, provide a deeper insight into the development of the material microstructure. By experimentally measuring the initial texture and using it as an initial condition for the simulations, it is possible to predict the evolution of the microstructure and the resulting effect on the mechanical properties during forming operations. The results of the simulations with VPSC show good qualitative agreement with tests typically used for rolled stock.

show abstract

A Computationally Efficient Multiscale, Multi-Phase Modeling Approach Based on CPFEM to Assess the Effect of Second Phase Particles on Mechanical Properties

Cited by 7 publications

References 32 publications

Modelling of Texture Development during Metal Forming Using FE-VPSC

Modelling of Texture Development during Metal Forming Using FE-VPSC

A Full-Field Crystal Plasticity Study on the Bauschinger Effect Caused by Non-Shearable Particles and Voids in Aluminium Single Crystals

Modelling of Texture Development during Metal Forming Using FE-VPSC

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