Effect of elastic strain energy on grain growth and texture in AZ31 magnesium alloy by phase-field simulation

He, Ri; Wang, Mingtao; Jin, Jianfeng; Zong, Yaping

doi:10.1088/1674-1056/26/12/128201

Cited by 8 publications

(5 citation statements)

References 38 publications

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“…However, it is difficult and costly to perform a quantitative research by an experimental method due to the influence of disturbing factors and the difficulty in controlling the orientation in a system with massive grains. Computational sim-ulation is an effective way, which can study microstructure evolution, such as grain growth, [7][8][9] texture evolution, [10,11] and precipitation, [12][13][14][15] and also predict thermomechanical response during processing. [16,17] Owing to its advantages such as simulating microstructure on a mesoscopic scale and avoiding tracking the interface explicitly, the phase field model is widely used for crystal evolution.…”

Section: Introductionmentioning

confidence: 99%

Effect of grain boundary energy anisotropy on grain growth in ZK60 alloy using a 3D phase-field modeling*

Song¹,

Wang²,

Ni³

et al. 2020

Chinese Phys. B

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A three-dimensional (3D) multiple phase field model, which takes into account the grain boundary (GB) energy anisotropy caused by texture, is established based on real grain orientations and Read–Shockley model. The model is applied to the grain growth process of polycrystalline Mg (ZK60) alloy to investigate the evolution characteristics in different systems with varying proportions of low-angle grain boundary (LAGB) caused by different texture levels. It is found that the GB energy anisotropy can cause the grain growth kinetics to change, namely, higher texture levels (also means higher LAGB proportion) result in lower kinetics, and vice versa. The simulation results also show that the topological characteristics, such as LAGB proportion and distribution of grain size, undergo different evolution characteristics in different systems, and a more serious grain size fluctuation can be caused by a higher texture level. The mechanism is mainly the slower evolution of textured grains in their accumulation area and the faster coarsening rate of non-textured grains. Therefore, weakening the texture level is an effective way for implementing a desired homogenized microstructure in ZK60 Mg alloy. The rules revealed by the simulation results should be of great significance for revealing how the GB anisotropy affects the evolution of polycrystalline during the grain growth after recrystallization and offer the ideas for processing the alloy and optimizing the microstructure.

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Section: Introductionmentioning

confidence: 99%

Effect of grain boundary energy anisotropy on grain growth in ZK60 alloy using a 3D phase-field modeling*

Song¹,

Wang²,

Ni³

et al. 2020

Chinese Phys. B

Self Cite

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“…Therefore, it was concluded that residual stress changed the transformation texture from <111>// X 0 to <101>// X 0. According to the study by He et al, [ 40 ] the inhomogeneity of elastic strain energy was the fundamental reason for the formation of the texture. It was analyzed that the change in the transformation texture in this article was due to that residual stress affecting the elastic strain energy state of the samples.…”

Section: Resultsmentioning

confidence: 99%

Effect of Residual Stress on the Continuous Cooling Transformation of High‐Strength Low‐Alloy Hot‐Rolled Strip

Fei,

Zhao,

Xue

2023

steel research int.

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The external stress will change the transformation process and microstructure of the material, and the residual stress generated during the processing of the material will also affect the transformation. Herein, the effect of residual stress is simulated by applying uniaxial elastic loads during the continuous cooling of high‐strength low‐alloy hot‐rolled strip. The transformation process and microstructure of the samples under different stress conditions are investigated. The results show that residual stress can accelerate the transformation process, and the tensile stress is greater than the compressive stress. The degree of lattice mismatch in stressed samples is larger than that in unstressed samples, leading to dislocation proliferation. It is found that there is a phenomenon of residual stress‐induced grain growth according to the statistics of grain size of different samples. Due to the higher dislocation density and smaller curvature of the parent phase interface under compressive stress, the compressive stress samples have a higher nucleation rate, resulting in smaller grain size than the tensile stress samples. In addition, the transformation texture also changes under residual stress.

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“…Based on the phenomenological study of material constitutive model, the two mechanisms require the different damage initiation criteria. [27,28] The ductile criterion is a phenomenological model for predicting damage caused by nucleation, growth, and coalescence of pores. The model assumes that the equivalent plastic strain εpl D at the beginning of the damage is a function of the triaxial stress and strain rate, that is εpl D (η, εpl ).…”

Section: Elastoplastic and Damage Constitutive Model Of Materials Mic...mentioning

confidence: 99%

Multi-scale elastoplastic mechanical model and microstructure damage analysis of solid expandable tubular*

Guo

Liu

et al. 2020

Chinese Phys. B

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We present an in-depth study of the failure phenomenon of solid expandable tubular (SET) due to large expansion ratio in open holes of deep and ultra-deep wells. By examining the post-expansion SET, lots of microcracks are found on the inner surface of SET. Their morphology and parameters such as length and depth are investigated by use of metallographic microscope and scanning electron microscope (SEM). In addition, the Voronoi cell technique is adopted to characterize the multi-phase material microstructure of the SET. By using the anisotropic elastoplastic material constitutive model and macro/microscopic multi-dimensional cross-scale coupled boundary conditions, a sophisticated and multi-scale finite element model (FEM) of the SET is built successfully to simulate the material microstructure damage for different expansion ratios. The microcrack initiation and growth is simulated, and the structural integrity of the SET is discussed. It is concluded that this multi-scale finite element modeling method could effectively predict the elastoplastic deformation and the microscopic damage initiation and evolution of the SET. It is of great significance as a theoretical analysis tool to optimize the selection of appropriate tubular materials and it could be also used to substantially reduce costly failures of expandable tubulars in the field. This numerical analysis is not only beneficial for understanding the damage process of tubular materials but also effectively guides the engineering application of the SET technology.

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Effect of elastic strain energy on grain growth and texture in AZ31 magnesium alloy by phase-field simulation

Cited by 8 publications

References 38 publications

Effect of grain boundary energy anisotropy on grain growth in ZK60 alloy using a 3D phase-field modeling*

Effect of grain boundary energy anisotropy on grain growth in ZK60 alloy using a 3D phase-field modeling*

Effect of Residual Stress on the Continuous Cooling Transformation of High‐Strength Low‐Alloy Hot‐Rolled Strip

Multi-scale elastoplastic mechanical model and microstructure damage analysis of solid expandable tubular*

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