Processing map for controlling microstructure and unraveling various deformation mechanisms during hot working of CoCrFeMnNi high entropy alloy

Patnamsetty, Madan; Somani, Mahesh C.; Ghosh, Sumit; Ahmed, Shahroz; Peura, Pasi

doi:10.1016/j.msea.2020.139840

Cited by 35 publications

(16 citation statements)

References 34 publications

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“…In particular, the domain of dynamic recrystallization (DRX) is important, since this process reconstitutes the microstructure and enhances the hot workability. In literature, there are only few studies on the development of processing maps of HEAs, such as CoCrFeMnNi [29], Al 0.5 CoCrFeMnNi [30], Al 0.7 CoCrFeNi [18] and FeCrCuNi 2 Mn 2 [28], illustrating their hot workability and constitutive models. However, these studies offer only a limited in-depth analysis in terms of the evolution of microstructures without encompassing all the deterministic domains of the processing maps.…”

Section: Introductionmentioning

confidence: 99%

Characterization of hot deformation behavior of Al0.3CoCrFeNi high-entropy alloy and development of processing map

Patnamsetty

Ghosh

Somani

et al. 2022

Journal of Alloys and Compounds

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Section: Introductionmentioning

confidence: 99%

Characterization of hot deformation behavior of Al0.3CoCrFeNi high-entropy alloy and development of processing map

Patnamsetty

Ghosh

Somani

et al. 2022

Journal of Alloys and Compounds

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“…It also shows the formation of a few column grains in addition to the equiaxed grains as the strain rate increases (0.1 s −1 and 5 s −1 ). The effect of strain rate on the hot deformation of other alloys has been reported with the same findings, such as magnesium [ 137 ], CoCrFeMnNi high-entropy [ 138 ], nickel [ 139 , 140 ], aluminum [ 141 ], iron [ 142 ], and titanium [ 143 ] alloys.…”

Section: Flow Stress Behaviormentioning

confidence: 57%

On the Prediction of the Flow Behavior of Metals and Alloys at a Wide Range of Temperatures and Strain Rates Using Johnson–Cook and Modified Johnson–Cook-Based Models: A Review

et al. 2023

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This paper reviews the flow behavior and mathematical modeling of various metals and alloys at a wide range of temperatures and strain rates. Furthermore, it discusses the effects of strain rate and temperature on flow behavior. Johnson–Cook is a strong phenomenological model that has been used extensively for predictions of the flow behaviors of metals and alloys. It has been implemented in finite element software packages to optimize strain, strain rate, and temperature as well as to simulate real behaviors in severe conditions. Thus, this work will discuss and critically review the well-proven Johnson–Cook and modified Johnson–Cook-based models. The latest model modifications, along with their strengths and limitations, are introduced and compared. The coupling effect between flow parameters is also presented and discussed. The various methods and techniques used for the determination of model constants are highlighted and discussed. Finally, future research directions for the mathematical modeling of flow behavior are provided.

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“…According to previous reports [36][37][38][39], the relationship between power dissipation efficiency (η) and strain rates at different inter-pass time of 1 s, 10 s and 100 s from the data of flow stress-strain curves are presented in figure 9. At a strain of 0.15 for the 1st-step compression (figure 9(a)), the peak region of η value (local maximum value) appears at corners of 850 °C/0.01 s −1 and 1000 °C/1 s −1 .…”

Section: Establishment and Analysis Of 3d Processing Mapmentioning

confidence: 97%

Study on static softening behavior and hot working performance of Fe-0.2C-7Mn steel

Wang

Cen

Zhang

2022

Mater. Res. Express

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Static softening behavior and hot working performance of medium Mn steel (Fe-0.2C-7Mn) are studied by 2-step and interrupt hot compression test with a Gleeble-3500 thermal-mechanical simulator. The results show that static softening behavior of the steel exhibits obvious sensitivity to the deformation temperature, inter-pass time and strain rate. But deformation temperature has a more significant effect on the static recrystallization (SRX) grain size than strain rate. 3D hot working processing maps are established, that low temperature and medium strain rate (850°C~925°C and 0.02s-1~0.3s-1) are the preferred thermal deformation conditions for the test steel. Microstructure observations indicates that both static recovery (SRV) and SRX occur within inter-pass time, and SRV is the predominant mechanism in determining softening fraction. The microstructure is composed of film-like α at room temperature, and most of the nucleation of SRX preferably take place at triple junctions of grains or prior grain boundaries. Besides, high-angle grain boundaries (HAGBs) migration produce twin boundaries during grain growth and the main nucleation mechanism of the SRX is strain-induced boundary migration. The kinetics model of static softening is established and the experimental values are consistent with predicted ones, which proves the reliability of the model.

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Processing map for controlling microstructure and unraveling various deformation mechanisms during hot working of CoCrFeMnNi high entropy alloy

Cited by 35 publications

References 34 publications

Characterization of hot deformation behavior of Al0.3CoCrFeNi high-entropy alloy and development of processing map

Characterization of hot deformation behavior of Al0.3CoCrFeNi high-entropy alloy and development of processing map

On the Prediction of the Flow Behavior of Metals and Alloys at a Wide Range of Temperatures and Strain Rates Using Johnson–Cook and Modified Johnson–Cook-Based Models: A Review

Study on static softening behavior and hot working performance of Fe-0.2C-7Mn steel

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