Application of Crystal Plasticity Model for Simulation of Polycrystalline Aluminum Sample Behavior During Plain Strain Compression Test

Wajda, W.; Madej, Łukasz; Paul, H.

doi:10.2478/amm-2013-0024

Cited by 8 publications

(3 citation statements)

References 7 publications

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“…This 'room temperature annealing' was also observed earlier in pure copper plane strain compressed at 77 K and Cu-2%Al alloy single crystals [47] or silver ECAP-ed at room temperature [48]. It is worth to mention, that the data can be employed in development of numerical models like digital material representation, which mostly relay on crystal plasticity material model description [49,50].…”

Section: Crystallographic Aspect Of New Grains Occurring Near and Farmentioning

confidence: 93%

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Tem Study of Recrystallization in Ultra-Fine Grain AA3104 Alloy Processed by High-Pressure Torsion

Paul¹,

Morawiec²,

Baudin³

et al. 2015

Archives of Metallurgy and Materials

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The effect of annealing on the microstructure and the texture development was investigated in a particle containing AA3104 aluminium alloy. The samples were processed at room temperature by high-pressure torsion (HPT) up to ten turns. The nucleation of new grains was analyzed by a transmission electron microscope equipped with a system for local orientation measurements and a heating holder.The shear deformation induces a decrease of the grain size. After the first two turns of the HPT processing the initial structure of large grains was 'transformed' into a structure of fine cells/grains with the diameter of a few tens of nanometers. In the central areas of the samples the elongated shape of the cells/grains was observed up to six turns. For higher deformations, this structural inhomogeneity was totally removed and only the equiaxed grains were observed. The crystal lattice of small grains rotates in such a way that the <111> direction is parallel to the compression axis. After annealing the structure coarsened. Nevertheless, after primary recrystallization, the structure was still composed of relatively fine and equiaxed grains of a similar size. In most of the observed cases the size of the recrystallized grains in the areas close to and far from the large second phase particles was similar. The recrystallization leads to the creation of new texture components. The new grain orientations lost the positions typically observed in the deformed state and showed the tendency for the coincidence of the <100> crystallographic directions with the compression axis.Keywords: High Pressure Torsion, AA3104 alloy, TEM orientation mapping, Texture, Microstructure W pracy analizowano wpływ warunków wyżarzania na zmiany mikrostrukturalne i teksturowe w stopie AA3104 zawierającym wydzielenia cząstek drugiej fazy. Próbki odkształcano z wykorzystaniem techniki skręcania pod wysokim ciśnieniem (HPT), do dziesięciu obrotów, w temperaturze otoczenia. Proces zarodkowania nowych ziaren analizowano z wykorzystaniem transmisyjnej mikroskopii elektronowej wyposażonej w system pomiaru orientacji lokalnych oraz 'heating holder'.Zaobserwowano, że w miarę wzrostu liczby obrotów, intensywne ścinanie prowadzi do silnego zmniejszenia wielkości ziarna. Po dwu obrotach, wyjściowa struktura dużych ziaren uległa przekształceniu w strukturę drobnoziarnistą złożoną z ziaren o wielkości kilkudziesięciu nanometrów. W obszarach próbki zbliżonych do osi obrotu wydłużony kształt ziaren obserwowano do sześciu obrotów. W zakresie wyższych stopni odkształcenia ta niejednorodność strukturalna zanika; obserwowano jedynie równoosiowe ziarna. Orientacja sieci krystalicznej tych ziaren formuje silną teksturę osiową z kierunkiem <111> usytuowanym równolegle do kierunku normalnego (osi ściskania/skręcania). Po wyżarzaniu struktura ulega 'pogrubieniu'. Jednakże, w zakresie rekrystalizacji pierwotnej, w dalszym ciągu pozostaje równoosiowa i silnie rozdrobniona. W większości obserwowanych przypadków wielkość zrekrystalizowanych ziaren w obszarach położonych zarówno ...

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Section: Crystallographic Aspect Of New Grains Occurring Near and Farmentioning

confidence: 93%

“…• ) LAGB and an increased frequency of the boundaries with the disorientation angles close to [45][46][47][48][49][50] • (Fig. 12a), as typically observed in the deformed state.…”

Section: >15mentioning

confidence: 99%

Tem Study of Recrystallization in Ultra-Fine Grain AA3104 Alloy Processed by High-Pressure Torsion

Paul¹,

Morawiec²,

Baudin³

et al. 2015

Archives of Metallurgy and Materials

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“…The plasticity criterion depending on the current stress state and the current crystal orientation is the following, therefore (eq. 9) [35].…”

Section: Kinematical Equations Of the Cp Theorymentioning

confidence: 99%

Hybrid, Multiscale Numerical Simulations of the Equal Channel Angular Pressing (ECAP) using the Crystal Plasticity Theory

Wójcik

2023

Archives of Metallurgy and Materials

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Hybrid, Multiscale NuMerical siMulatioNs of tHe equal cHaNNel aNgular PressiNg (ecaP) usiNg tHe crystal Plasticity tHeoryThe FEM simulations of the EcAP including real conditions of the process -the friction between the metal extruded and the die walls, as well as, the channels rounding, were done here in two scales -macro-and micro-. The macroscopic analyses were done for isotopic material with a non-linear hardening using the UMAT user material procedure. The pure Lagrangian approach was applied here. The stress, strains and their increments, as well as, the deformation gradient tensor were recorded for selected finite elements in each calculation step. The displacements obtained in the macroscopic FEM analysis are then used as the kinematic input for the polycrystalline structure. The dislocation slip was included as the source of the plastic deformation here for the facecentered cubic structure. The results obtained with the use of the crystal plasticity show the heterogeneous distribution of stress and strain within the material associated with the grains anisotropy. The results in both micro-and macro-scales are coincident. The FEM analyses show the potential of the application of the crystal plasticity approach for solving elastic-plastic problems including the material forming processes.

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Discrete micro-scale cellular automata model for modelling phase transformation during heating of dual phase steels

Halder

Madej

Pietrzyk

2014

Archives of Civil and Mechanical Engineering

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Application of Crystal Plasticity Model for Simulation of Polycrystalline Aluminum Sample Behavior During Plain Strain Compression Test

Cited by 8 publications

References 7 publications

Tem Study of Recrystallization in Ultra-Fine Grain AA3104 Alloy Processed by High-Pressure Torsion

Tem Study of Recrystallization in Ultra-Fine Grain AA3104 Alloy Processed by High-Pressure Torsion

Hybrid, Multiscale Numerical Simulations of the Equal Channel Angular Pressing (ECAP) using the Crystal Plasticity Theory

Discrete micro-scale cellular automata model for modelling phase transformation during heating of dual phase steels

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