On the dependence of in-grain subdivision and deformation texture of aluminum on grain interaction

Raabe, Dierk; Zhao, Z.; Mao, Wei Min

doi:10.1016/s1359-6454(02)00276-8

Cited by 125 publications

(62 citation statements)

References 27 publications

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“…Thus, most of HAGBs are formed by grain subdivision related to texture evolution. The grain subdivision depends strongly on the initial orientation [18][19]. The ambiguity of the selections of slip systems for the unstable orientations leads to diverging rotations within a grain, i.e.…”

Section: Evolution Of High Angle Grain Boundaries and Texturesmentioning

confidence: 99%

“…The stable orientations during rolling are β-fiber orientations in Euler space, especially the Copper orientation [20]. The grains of stable orientations have a small tendency to subdivide due to texture [18][19]. Region B demonstrates the inhibited subdivision in a grain of a stable orientation (probably the Copper texture).…”

Section: Evolution Of High Angle Grain Boundaries and Texturesmentioning

confidence: 99%

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Influence of dispersoids on grain subdivision and texture evolution in aluminium alloys during cold rolling

Zhao

Holmedal

2014

Transactions of Nonferrous Metals Society of China

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Al-Mn alloys containing similar amounts of solutes but various dispersoid densities were cold rolled. The grain subdivision was examined by electron backscatter diffraction. The texture was measured by X-ray diffraction. It is found that a high density of fine dispersoids enhances the development of the Copper and S textures at large strains, and also induces a higher fraction of high angle grain boundaries. It is suggested that the texture evolution affects the grain subdivision and contributes to the formation of high angle grain boundaries.Key words: aluminum alloys; grain boundary; texture; deformation; microstructure IntroductionThe deformation structure of f.c.c. metals, mainly Cu, Ni and Al has been investigated in a number of studies [1][2][3][4]. Generally the microstructure of metals with high stacking fault energy evolves from a dislocation cell structure into a lamellar structure during cold rolling. While coarse particles induce the formation of deformation zones containing large local misorientation gradients [5], fine particles enhance the tendency for dislocations to arrange into a cell structure [6], leading to a reduced cell size [1,6]. Besides, dispersoids affect the grain subdivision during deformation [7]. The evolution of high angle grain boundaries (HAGB) and grain refinement mechanisms during deformation at large strain receives much attention in recent research, since severe plastic deformation (SPD) is used to produce nanocrystalline materials. The influence of dispersoids on the HAGB fraction evolution is important for the production of nanocrystalline materials by SPD [7]. The influence of non-shearable fine dispersoids on misorientation across boundaries reported in previous research seems controversial. It is reported that fine-dispersed particles increased effectively the mean misorientation between subgrains [8], and also the misorientation of cell block walls [9]. Conversely, it is also reported a lower misorientation across subgrains [7,10] and diffuse boundaries [7] due to dispersoids and also a smaller long-range orientation spread [10] , compared to a single-phase alloy. Previous research shows that the HAGB fraction was reduced by a high density of dispersoids at very large strains (von Mises strain >3) [7,9]. The influence of dispersoids at smaller strains is contradictory, where both a small increase and decrease in HAGB fraction of dispersed alloys are reported [7,9]. A very high HAGB fraction (60-70%) at von Mises strain of 1-3 was reported due to the presence of dispersoids [8].

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Section: Evolution Of High Angle Grain Boundaries and Texturesmentioning

confidence: 99%

Section: Evolution Of High Angle Grain Boundaries and Texturesmentioning

confidence: 99%

Influence of dispersoids on grain subdivision and texture evolution in aluminium alloys during cold rolling

Zhao

Holmedal

2014

Transactions of Nonferrous Metals Society of China

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“…the structure-property relationship, or for texture evolution predictions 35,36 , in crystal plasticity finite element analyses. Some example regular microstructures are shown in Fig.1.…”

Section: Regular Simplified Morphologiesmentioning

confidence: 99%

Modelling Polycrystalline Materials: An Overview of Three-Dimensional Grain-Scale Mechanical Models

Benedetti

Barbe

2013

J. Multiscale Modelling

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A survey of recent contributions on three-dimensional grain-scale mechanical modelling of polycrystalline materials is given in this work. The analysis of material microstructures requires the generation of reliable micro-morphologies and affordable computational meshes as well as the description of the mechanical behavior of the elementary constituents and their interactions. The polycrystalline microstructure is characterized by the topology, morphology and crystallographic orientations of the individual grains and by the grain interfaces and microstructural defects, within the bulk grains and at the inter-granular interfaces. Their analysis has been until recently restricted to twodimensional cases, due to high computational requirements. In the last decade, however, the wider affordability of increased computational capability has promoted the development of fully three-dimensional models. In this work, different aspects involved in the grain-scale analysis of polycrystalline materials are considered. Different techniques for generating artificial micro-structures, ranging from highly idealized to experimentally based high-fidelity representations, are briefly reviewed. Structured and unstructured meshes are discussed. The main strategies for constitutive modelling of individual bulk grains and inter-granular interfaces are introduced. Some attention has also been devoted to three-dimensional multiscale approaches and some established and emerging applications have been discussed.

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“…Our recent paper [8] shortly reviews the approaches used for modeling the grain refinement using the macroscopic phenomenological, [19,20] the mean-field crystal plasticity models enhanced by some additional features [8,[21][22][23][24][25][26] and the incremental energy minimization-based models. [27][28][29][30] Apart from the approaches discussed in Reference 8, models applying the crystal plasticity finite element method (CPFEM) with many integration points or elements per grain [31][32][33][34][35] are also worth mentioning as a possible tool to predict the grain refinement. However, none of the models mentioned is able to fully predict the grain refinement in FCC materials.…”

Section: Introductionmentioning

confidence: 99%

Microstructure Evolution in Cold-Rolled Pure Titanium: Modeling by the Three-Scale Crystal Plasticity Approach Accounting for Twinning

Frydrych

Kowalczyk-Gajewska

2018

Metall Mater Trans A

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A three-scale crystal plasticity model is applied to simulate microstructure evolution in hcp titanium subjected to cold rolling. Crystallographic texture and misorientation angle development, as an indicator of grain refinement, are studied. The impact of twinning activity on both phenomena is accounted for by combining the original three-scale formulation with the probabilistic twin-volume consistent (PTVC) reorientation scheme. The modeling results are compared with available experimental data. It is shown that the simulated textures are in accordance with the experimental measurements. The basic components of misorientation angle distribution, especially in the range of high angle boundaries, are also well reproduced.

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On the dependence of in-grain subdivision and deformation texture of aluminum on grain interaction

Cited by 125 publications

References 27 publications

Influence of dispersoids on grain subdivision and texture evolution in aluminium alloys during cold rolling

Influence of dispersoids on grain subdivision and texture evolution in aluminium alloys during cold rolling

Modelling Polycrystalline Materials: An Overview of Three-Dimensional Grain-Scale Mechanical Models

Microstructure Evolution in Cold-Rolled Pure Titanium: Modeling by the Three-Scale Crystal Plasticity Approach Accounting for Twinning

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