Investigation on texture evolution during cyclic expansion–extrusion (CEE) technique using crystal plasticity finite element modeling

Sadrnia, Hassan; Ebrahimi, R.

doi:10.1007/s10853-016-0245-5

Cited by 9 publications

(2 citation statements)

References 32 publications

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“…In many studies, numerical and experimental methods have been used to investigate the properties of materials in microscale deformation, texture analysis, damage and crack initiation, micro-forming, severe plastic deformation and micromanufacturing processes [31][32][33][34][35][36][37][38]. The crystal plasticity finite element method (CPFE), considering texture and grains, has good accuracy in simulating material behavior under different conditions.…”

Section: Introductionmentioning

confidence: 99%

Crystal plasticity finite element simulation and experimental investigation of the micro-upsetting process of OFHC copper

Kardan-Halvaei

Morovvati

Mollaei-Dariani

2020

J. Micromech. Microeng.

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In this research, the size effect in the micro-upsetting process of oxygen-free high conductivity copper has been investigated numerically and experimentally. For the numerical part of this study, the crystal plasticity finite element (CPFE) method was employed and grains were produced using the Voronoi algorithm. The homogenization method was used for curve fitting and to obtain the material-hardening parameters. Then, simulation of the micro-upsetting process was carried out using a VUMAT subroutine which was written to implement crystal plasticity formulation. The micro-upsetting process was carried out at compression deformation of 50% for parts with diameters 0.75, 1 and 2 mm and height ratio of 1.5. Comparison of the data obtained from the CPFE and experimental procedures indicated a remarkable agreement. The results showed that, by increasing grain size from 30 to 60 μm, the forming forces for the diameters 0.75, 1 and 2 mm reduce by 12.3%, 6.8% and 6.7%, respectively, admitting the Hall–Petch equation. Also, according to the results obtained for constant grain sizes, when sample dimensions decrease, the stress–strain curve of the micro-upsetting process shows a downward shift which happens due to the increase in the grain size ratio and size effect. For the first time, investigation of the barrel shape and end surface geometry obtained from simulations and experimental tests shows distortion in the boundaries of both the modeled and fabricated specimens. Therefore, in micro-sized parts, the grain size has a greater effect on behavior of the material and geometrical accuracy.

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Section: Introductionmentioning

confidence: 99%

Crystal plasticity finite element simulation and experimental investigation of the micro-upsetting process of OFHC copper

Kardan-Halvaei

Morovvati

Mollaei-Dariani

2020

J. Micromech. Microeng.

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“…e common dynamic recrystallization mechanism of the Mg alloy includes twinning-induced dynamic recrystallization, continuous dynamic recrystallization, and rotation dynamic recrystallization [20][21][22], which makes the microstructural evolution more complex. Sheikh and Ebrahimi [23] studied the texture evolution during CEE technique using crystal plasticity finite element modeling. However, there is little research work focusing on the texture evolution of Mg alloy during CEE technique.…”

Section: Introductionmentioning

confidence: 99%

Effect of Cyclic Expansion-Extrusion Process on Microstructure, Deformation and Dynamic Recrystallization Mechanisms, and Texture Evolution of AZ80 Magnesium Alloy

Xue

Chen

Liu

et al. 2019

Advances in Materials Science and Engineering

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The microstructure, deformation mechanisms, dynamic recrystallization (DRX) behavior, and texture evolution of AZ80 magnesium alloy were investigated by three-pass cyclic expansion-extrusion (CEE) tests. Optical microscopy (OM), electron back-scattered diffraction (EBSD), and X-ray diffraction (XRD) were employed to study microstructure, grain orientation, DRX mechanism, and texture evolution. The results show that the grain sizes decrease continuously with the increase of CEE pass. The grain refinement effect of the first pass is the most remarkable, and there appear a large number of twins. After three-pass CEE, a well-distributed structure with fine equiaxed grains is obtained. With the increase of CEE pass, the deformation mechanism changes from twinning to slipping and the DRX mechanism changes mainly from twinning-induced dynamic recrystallization (TDRX) to rotation dynamic recrystallization (RDRX) and then to continuous dynamic recrystallization (CDRX). The grain misorientation between the new grains and matrix grains deceases gradually, and a relatively small angle misorientation is obtained after three-pass CEE. Grain misorientations of the first two passes are attributed to TDRX and RDRX behaviors, respectively. The grain refinement changes the deformation and DRX mechanisms of CEE process, which leads the (0002) basal texture intensity first decrease and then increase suddenly. Eventually, the extremely strong basal texture is formed after three-pass CEE.

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Subgrain Effect on Grain Scale Plasticity of NiTi Shape Memory Alloy Under Canning Compression: A Crystal Plasticity Finite Element Analysis

Jiang

et al. 2018

Met. Mater. Int.

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Investigation on texture evolution during cyclic expansion–extrusion (CEE) technique using crystal plasticity finite element modeling

Cited by 9 publications

References 32 publications

Crystal plasticity finite element simulation and experimental investigation of the micro-upsetting process of OFHC copper

Crystal plasticity finite element simulation and experimental investigation of the micro-upsetting process of OFHC copper

Effect of Cyclic Expansion-Extrusion Process on Microstructure, Deformation and Dynamic Recrystallization Mechanisms, and Texture Evolution of AZ80 Magnesium Alloy

Subgrain Effect on Grain Scale Plasticity of NiTi Shape Memory Alloy Under Canning Compression: A Crystal Plasticity Finite Element Analysis

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