scholarly journals 3D simulation of texture evolution induced grain coarsening in FCC polycrystals during severe plastic deformation

2021 ◽  
Vol 1121 (1) ◽  
pp. 012045
Author(s):  
Chi Zhang ◽  
Laszlo S Toth
Keyword(s):  
Plastic Deformation ◽  
Severe Plastic Deformation ◽  
Texture Evolution ◽  
3D Simulation ◽  
Grain Coarsening

scholarly journals Polycrystal Simulation of Texture-Induced Grain Coarsening during Severe Plastic Deformation

Materials ◽  
2020 ◽  
Vol 13 (24) ◽  
pp. 5834
Author(s):  
Chi Zhang ◽  
Laszlo S. Toth
Keyword(s):  
Plastic Deformation ◽  
Severe Plastic Deformation ◽  
Electron Backscatter Diffraction ◽  
Texture Evolution ◽  
Face Centered Cubic ◽  
Shear Texture ◽  
Grain Coarsening ◽  
Random Texture ◽  
Polycrystal Plasticity ◽  
Grain Fragmentation

During severe plastic deformation (SPD), there is usually extended grain fragmentation, associated with the formation of a crystallographic texture. The effect of texture evolution is, however, coarsening in grain size, as neighbor grains might coalesce into one grain by approaching the same ideal orientation. This work investigates the texture-induced grain coarsening effect in face-centered cubic polycrystals during simple shear, in 3D topology. The 3D polycrystal aggregate was constructed using a cellular automaton model with periodic boundary conditions. The grains constituting the polycrystal were assigned to orientations, which were updated using the Taylor polycrystal plasticity approach. At the end of plastic straining, a grain detection procedure (similar to the one in electron backscatter diffraction, but in 3D) was applied to detect if the orientation difference between neighboring grains decreased below a small critical value (5°). Three types of initial textures were considered in the simulations: shear texture, random texture, and cube-type texture. The most affected case was the further shearing of an initially already shear texture: nearly 40% of the initial volume was concerned by the coalescence effect at a shear strain of 4. The coarsening was less in the initial random texture (~30%) and the smallest in the cube-type texture (~20%). The number of neighboring grains coalescing into one grain went up to 12. It is concluded that the texture-induced coarsening effect in SPD processing cannot be ignored and should be taken into account in the grain fragmentation process.

Texture Evolution in Si-Alloyed Ultra Low-Carbon Steels after Severe Plastic Deformation

2010 ◽  
Vol 12 (10) ◽  
pp. 1077-1081 ◽  
Author(s):  
P. Gobernado ◽  
R. Petrov ◽  
D. Ruiz ◽  
E. Leunis ◽  
Leo A. I. Kestens
Keyword(s):  
Plastic Deformation ◽  
Severe Plastic Deformation ◽  
Texture Evolution ◽  
Carbon Steels ◽  
Low Carbon ◽  
Low Carbon Steels

Texture Evolution of Armco Iron during Accumulative Roll Bonding Process

2011 ◽  
Vol 702-703 ◽  
pp. 177-181
Author(s):  
Erell Bonnot ◽  
François Brisset ◽  
Anne Laure Helbert ◽  
Thierry Baudin
Keyword(s):  
Plastic Deformation ◽  
Grain Size ◽  
Severe Plastic Deformation ◽  
Accumulative Roll Bonding ◽  
Armco Iron ◽  
Texture Evolution ◽  
Equivalent Strain ◽  
Electron Backscattered Diffraction ◽  
Roll Bonding ◽  
Number Of Cycles

The Armco iron is one of the purest commercial iron with very low levels of carbon, oxygen and nitrogen. In order to improve the mechanical properties, it is worth applying severe plastic deformation to obtain ultrafine-grained bulk materials, with grain size <1µm. In this study, samples of Armco iron were subjected to a technique of severe plastic deformation named Accumulative Roll Bonding (ARB). The important parameter of ARB is the number of cycles and then the von Mises equivalent strain. By means of the Electron BackScattered Diffraction (EBSD) technique, the texture evolution with the number of cycles was studied. The microhardness was also measured in function of the equivalent strain. Finally, the mean grain size and the fraction of high angle grain boundaries were determined as a function of the number of cycles.

Texture evolution in {112} aluminum single crystals processed by severe plastic deformation

2013 ◽  
Vol 75 ◽  
pp. 129-137 ◽  
Author(s):  
Keizo Kashihara ◽  
Yoshitaka Tsujimoto ◽  
Daisuke Terada ◽  
Nobuhiro Tsuji
Keyword(s):  
Plastic Deformation ◽  
Severe Plastic Deformation ◽  
Single Crystals ◽  
Texture Evolution

scholarly journals An Investigation on Microstructure, Texture and Mechanical Properties of AZ80 Mg Alloy Processed by Annular Channel Angular Extrusion

Materials ◽  
2019 ◽  
Vol 12 (6) ◽  
pp. 1001 ◽  
Author(s):  
Xi Zhao ◽  
Shuchang Li ◽  
Yong Xue ◽  
Zhimin Zhang
Keyword(s):  
Mechanical Properties ◽  
Plastic Deformation ◽  
Severe Plastic Deformation ◽  
Texture Evolution ◽  
Boundary Migration ◽  
Annular Channel ◽  
Mg Alloy ◽  
Deformation Method ◽  
Single Pass ◽  
Angular Extrusion

Annular channel angular extrusion has been recently developed as a new single-pass severe plastic deformation method suitable for producing large size cup-shaped parts from cylindrical billets. In this study, the novel technology was successfully applied to commercial AZ80 Mg alloy at 300 °C, and microstructure, texture evolution, and mechanical properties were investigated. Due to severe shear deformation, the initial microstructure, including the coarse grains and large eutectic β-phases, was greatly refined. The strong basal texture formed during the initial deformation stage was modified into a weak tilted dynamic texture. During the deformation process, fine β-particles separated from eutectic phases effectively hindered the grain boundary migration and rotation, enhancing the grain refinement and texture weakening. More than 63% of the microhardness increase was achieved in this extruded part. Also, tensile tests showed the yield strength and elongation in both directions (transverse and longitudinal) of extruded part were improved more than 2.5 times, and the ultimate tensile strength was improved more than 2 times, compared to the initial material state. The improved material properties were mainly attributed to microstructure (grain and phase) refinement and texture weakening. It was demonstrated that the annular channel angular extrusion process can be considered as a novel and effective single-pass severe plastic deformation method.

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