Modeling dynamic recrystallization behavior of Al-Zn-Mg-Cu alloy during electroshock assisted tension based on cellular automata

Mei, Manlin; Song, Yanli; Lu, Jue; Hao, Chuanchuan; Xie, Lechun

doi:10.1088/2053-1591/ac5e23

Cited by 6 publications

(5 citation statements)

References 40 publications

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“…Colored grains represent recrystallized grains, while white grains represent the matrix. The standard errors for all three sets of results are ±4.56%, suggesting that the recrystallization nucleation mechanism of the Al-Zn-Mg-Cu alloy is dynamic recrystallization [178]. Figure 12D…”

Section: Finite Element Applicationsmentioning

confidence: 88%

Mechanism of Electropulsing Treatment Technology for Flow Stress of Metal Material: A Review

Lu,

Tang,

et al. 2024

Alloys

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Residual stress is caused by non–uniform deformation caused by non–uniform force, heat and composition, which is of great significance in engineering applications. It is assumed that the residual stress is always the upper limit of the elastic limit, so the reduction of the flow stress will reduce the residual elastic stress. It is particularly important to control the flow stress in metal materials. Compared with traditional methods, the use of electropulsing treatment (EPT) technology stands out due to its energy–efficient, highly effective, straightforward and pollution–free characteristics. However, there are different opinions about the mechanism of reducing flow stress through EPT due to the conflation of the effects from pulsed currents. Herein, a clear correlation is identified between induced stress levels and the application of pulsed electrical current. It was found that the decrease in flow stress is positively correlated with the current density and the duration of electrical contact and current action time. We first systematically and comprehensively summarize the influence mechanisms of EPT on dislocations, phase, textures and recrystallization. An analysis of Joule heating, electron wind effect, and thermal–induced stress within metal frameworks under the influence of pulsed currents was conducted. And the distribution of electric, thermal and stress fields under EPT are discussed in detail based on a finite element simulation (FES). Finally, some new insights into the issues and challenges of flow stress drops caused by EPT are proposed, which is critically important for advancing related mechanism research and the revision of theories and models.

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Section: Finite Element Applicationsmentioning

confidence: 88%

Mechanism of Electropulsing Treatment Technology for Flow Stress of Metal Material: A Review

Lu,

Tang,

et al. 2024

Alloys

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“…The current study has shown that CA is able to simulate the change in dislocation density in dynamic recrystallization. Since there is a relationship between flow stress and dislocation density, the flow stress during thermal deformation is also obtained via CA simulation [ 65 , 113 , 114 , 115 ]. Since CA can reasonably simulate the microstructure of metallic materials, it is no longer far from predicting the mechanical properties of metallic materials.…”

Section: Future Research Directions Of Ca In Metallic Materials Researchmentioning

confidence: 99%

Review on Cellular Automata for Microstructure Simulation of Metallic Materials

Zhi,

Jiang,

et al. 2024

Materials

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The cellular automata (CA) method has played an important role in the research and development of metallic materials. CA can interpret the microstructure changes of materials and obtain more abundant, accurate and intuitive information of microstructure evolution than conventional methods. CA can visually represent the process of grain formation, growth, development and change to us in a graphical way, which can assist us in analysis, thinking and solving problems. In the last five years, the application of CA in materials research has been rapidly developed, and CA has begun to occupy an increasingly important position in the simulation research of metallic materials. After introducing the advantages and limitations of CA compared to other widely used simulation methods, the purpose of this paper is to review the recent application progress on the microstructure simulation of metallic materials using CA, such as solidification, recrystallization, phase transformation and carbide precipitation occurring during forming and heat treatment. Specifically, recent research advances on microstructure simulation by CA in the fields of additive manufacturing, welding, asymmetrical rolling, corrosion prevention, etc., are also elaborated in this paper. Furthermore, this paper points out the future work direction of CA simulation in the research of metallic materials, especially in the simulation of the crystal structure, the prediction of mechanical properties, CA simulation software and rule systems, etc. These are expected to attract wide attention of researchers in the field of metallic materials and promote the development of CA in materials research.

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“…On the one hand, Joule heat is produced by the ferocious collisions of atoms and electrons in the material, which boosts atom mobility. On the other hand, the directional movement of free electrons improves the nucleation of recrystallization by enhancing the mobility and recovery of dislocations [22].…”

Section: Effect Of Est On Dynamic Recrystallizationmentioning

confidence: 99%

“…Under proper EST parameters, the role of electricity acts as a st driving force for the nucleation and growth of recrystallization, resulting in the pro tion of more small recrystallization grains. On the one hand, Joule heat is produced b ferocious collisions of atoms and electrons in the material, which boosts atom mob On the other hand, the directional movement of free electrons improves the nucleatio recrystallization by enhancing the mobility and recovery of dislocations [22]. are collectively referred to as small-angle grain boundaries.…”

Section: Effect Of Est On Dynamic Recrystallizationmentioning

confidence: 99%

“…Thermal and nonthermal effects during EST provide a driving force to promote recrystallization, which combines with the critical grain nucleation size, R c , to impact the dynamic recrystallization of materials. The critical grain nucleation size R c can be calculated according to the following equation [22]:…”

Section: High-strength Aluminum Alloy Dynamic Recrystallization Mecha...mentioning

confidence: 99%

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Promoting Dynamic Recrystallization of Al-Zn-Mg-Cu Alloy via Electroshock Treatment

Song

et al. 2023

Metals

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The application of high-strength Al-Zn-Mg-Cu alloy is seriously limited because of its poor formability. A novel electroshock treatment (EST) technique with low frequency combined with tensile deformation was proposed to address the issues of low plasticity and poor formability of Al-Zn-Mg-Cu alloy, which could revolutionize conventional plastic forming methods and realize near-room temperature forming of complex components. Al-Zn-Mg-Cu alloy was examined in this work to figure out how EST affects the tensile characteristics and dynamic recrystallization of the alloy during tensile deformation. The findings demonstrate that when electroshock with a current density of 30 A/mm² and a period of 5 s, the elongation of the alloy increased by 21.74%, and the fraction of dynamic recrystallization increased by 77.56% compared to the sample without EST at a temperature far below the recrystallization temperature. The electron back scatter diffraction (ESBD) results show that after appropriate EST, the average grain size decreased from 40 μm to 30 μm, the distribution of grain was more uniform, and the sample’s grain boundary angle generally increased, which is more attractive to facilitate the nucleation and growth of dynamic recrystallization. Additionally, transmission electron microscopy (TEM) results indicate that electroshock energy motivated the migration of dislocations from the grain interior to near the grain boundaries, improving the ability of Al-Zn-Mg-Cu alloy to dynamically recrystallize at near ambient temperature and enhancing elongation.

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Modeling dynamic recrystallization behavior of Al-Zn-Mg-Cu alloy during electroshock assisted tension based on cellular automata

Cited by 6 publications

References 40 publications

Mechanism of Electropulsing Treatment Technology for Flow Stress of Metal Material: A Review

Mechanism of Electropulsing Treatment Technology for Flow Stress of Metal Material: A Review

Review on Cellular Automata for Microstructure Simulation of Metallic Materials

Promoting Dynamic Recrystallization of Al-Zn-Mg-Cu Alloy via Electroshock Treatment

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