Simulation of Microstructure Evolution in Metal Materials under Hot Plastic Deformation and Heat Treatment

Churyumov, A. Yu.; Поздняков, А. В.

doi:10.1134/s0031918x20110034

Cited by 7 publications

(3 citation statements)

References 121 publications

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“…To study the microstructural evolutions associated with dynamic recrystallization and nucleation during hot deformation processes, Avrami's kinetic equations have been extensively utilized [16,[28][29][30][31][32]. The onset of dynamic recrystallization is identified when the accumulated plastic strain exceeds the critical strain threshold and the development of recrystallization can be assessed using strain changes at each time step within the elements.…”

Section: Microstructural Constitutive Equationsmentioning

confidence: 99%

Thermal–Mechanical and Microstructural Simulation of Rotary Friction Welding Processes by Using Finite Element Method

Mani,

Taherizadeh,

Sadeghian

et al. 2024

Materials

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Rotary friction welding is one of the most crucial techniques for joining different parts in advanced industries. Experimentally measuring the history of thermomechanical and microstructural parameters of this process can be a significant challenge and incurs high costs. To address these challenges, the finite element method was used to simulate thermomechanical and microstructural aspects of the welding of identical superalloy Inconel 718 tubes. Numerical simulation results were used to compute essential mechanical and metallurgical parameters such as temperature, strain, strain rate, volume fraction of dynamic recrystallization, and grain size distribution. These parameters were subsequently verified using experimental test results. The Johnson–Avrami model was utilized in the microstructural simulation to convert thermomechanical parameters into metallurgical factors, employing a FORTRAN subroutine. The calculated thickness of the recrystallization zone in the wall was 480 and 850 μm at the tube wall’s center and edge, respectively. These values were reported from experimental measurements as 500 and 800 μm, respectively. The predicted grain size changes from the center to the edge of the wall thickness, near the weld interface, ranged from 2.07 to 2.15 μm, comparable to the experimental measurements ranging from 1.9 to 2.2 μm. Various curves are also presented to explore the correlation between thermomechanical and microstructural parameters, with the experimental results revealing predictable microstructure evolutions correlated with thermomechanical changes.

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Section: Microstructural Constitutive Equationsmentioning

confidence: 99%

Thermal–Mechanical and Microstructural Simulation of Rotary Friction Welding Processes by Using Finite Element Method

Mani,

Taherizadeh,

Sadeghian

et al. 2024

Materials

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“…Further recent work concerning the simulation of microstructure evolution and dynamic crystallization in hot plastic deformation of metals can be found in [40,41].…”

Section: Process Simulation and Materials Modellingmentioning

confidence: 99%

Experimental and Numerical Investigation of Hot Extruded Inconel 718

Bacchetti

Coppola

Bona

et al. 2023

Metals

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Inconel 718 is a widely used superalloy, due to its unique corrosion resistance and mechanical strength properties at very high temperatures. Hot metal extrusion is the most widely used forming technique, if the manufacturing of slender components is required. As the current scientific literature does not comprehensively cover the fundamental aspects related to the process–structure relationships, in the present work, a combined numerical and experimental approach is employed. A finite element (FE) model was established to answer three key questions: (1) predicting the required extrusion force at different extrusion speeds; (2) evaluating the influence of the main processing parameters on the formation of surface cracks using the normalized Cockcroft Latham’s (nCL) damage criterion; and (3) quantitatively assessing the amount of recrystallized microstructure through Avrami’s equation. For the sake of modeling validation, several experimental investigations were carried out under different processing conditions. Particularly, it was found that the higher the initial temperature of the billet, the lower the extrusion force, although a trade-off must be sought to avoid the formation of surface cracks occurring at excessive temperatures, while limiting the required extrusion payload. The extrusion speed also plays a relevant role. Similarly to the role of the temperature, an optimal extrusion speed value must be identified to minimize the possibility of surface crack formation (high speeds) and to minimize the melting of intergranular niobium carbides (low speeds).

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“…Slip occurs at the grain boundaries due to weakening of the grain boundaries at high temperatures. On the other hand, other diffusion-controlled phenomena can also happen and microstructure changes [11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

The Effect of Strain Rate and Initial Grain Size on Deformation Behavior of OFHC Copper at Elevated Temperatures

Yıldırım

Arikan²

2021

Celal Bayar Üniversitesi Fen Bilimleri Dergisi

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Understanding of plastic deformation mechanisms and/or microstructural changes of metals and alloys at elevated temperatures makes possible to control their hot working behavior and final mechanical properties. The aim of the present work is to optimize the conditions to achieve maximum ductility in terms of initial grain size, process temperature and deformation rate. In this study, the OFHC (oxygen-free high conductivity) copper samples of different initial grain sizes (25, 50, 100 and 150 μm) were subjected to tensile tests at temperatures 300, 405, 500 and 700 °C (0.42 - 0.75 Tm) and cross-head speeds of 1, 2, 5, 10, 20 and 50 mm/min (strain rates of 5.6x10-4 - 2.8x10-2 s-1). Experimental results indicated that particular conditions (initial grain size of 50 µm; 700 °C of working temperature and 5.6x10-3 s-1 of strain rate) should be provided in terms of process temperature and deformation rate depending upon initial grain size for dynamic recrystallization and also maximum ductility.

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Simulation of Microstructure Evolution in Metal Materials under Hot Plastic Deformation and Heat Treatment

Cited by 7 publications

References 121 publications

Thermal–Mechanical and Microstructural Simulation of Rotary Friction Welding Processes by Using Finite Element Method

Thermal–Mechanical and Microstructural Simulation of Rotary Friction Welding Processes by Using Finite Element Method

Experimental and Numerical Investigation of Hot Extruded Inconel 718

The Effect of Strain Rate and Initial Grain Size on Deformation Behavior of OFHC Copper at Elevated Temperatures

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