Hot deformation behavior and constitutive modeling of a cost-effective Al8Cr12Mn25Ni20Fe35 high-entropy alloy

Abdel-Ghany, Ahmed W.; Jaskari, Matias; Hamada, Atef; Järvenpää, Antti; El-Hofy, Hassan; Chiba, Akihiko; Gepreel, Mohamed Abdel‐Hady

doi:10.1016/j.jallcom.2022.167028

Cited by 26 publications

(6 citation statements)

References 67 publications

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“…( 1) -( 3) are calculated respectively, as shown in Eq. ( 4) - (6). After calculation, n1 and β are 4.89665 and 0.02647.…”

Section: Stress-strain Curvesmentioning

confidence: 99%

Constitutive Equation and Processing Map of CoCrFeNiMo_0.3 High Entropy Alloy Based on The Thermoplastic Deformation

Wei,

Zhao,

Zhang

et al. 2023

J. Phys.: Conf. Ser.

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The unique characteristics of high entropy alloys are challenging the field of traditional materials science and are expected to apply innovations in fields such as aerospace and defense, making them one of the strong candidates. The thermoplastic deformation mechanisms and processing maps of CoCrFNiMo0.3 alloy were studied at a temperature (T) ranging from 950 - 1250 °C and a strain rate ( ε ˙ ) ranging from 0.001 - 0.1 s−1. A sharp rise is observed in the flow curve in the early stage, as the strain increases, slowly increasing flow stress due to the presence of dynamic softening, then turns to decrease, finally reaches a steady state. The optimal processing area was at 1050 - 1250 °C and 0.001 - 0.1 s−1, and there is an unstable area appearing at 950 - 1050 °C and 0.01 - 0.1 s−1. The η in the hot processing region are high, and they are not in the instability region.

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“…( 1) -( 3) are calculated respectively, as shown in Eq. ( 4) - (6). After calculation, n1 and β are 4.89665 and 0.02647.…”

Section: Stress-strain Curvesmentioning

confidence: 99%

Constitutive Equation and Processing Map of CoCrFeNiMo_0.3 High Entropy Alloy Based on The Thermoplastic Deformation

Wei,

Zhao,

Zhang

et al. 2023

J. Phys.: Conf. Ser.

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“…During hot deformation of the Cu-Ti-Fe alloy, a significant number of dislocations accumulate inside the material, the dislocation density gradually increases and intertwines to form dislocation walls. [32][33][34][35] The dislocation walls further develop into LAGBs and form subgrains, as shown in Figure 11d and 14a. When the corresponding critical stress value is reached, [36,37] the LAGBs continue to absorb dislocations, leading to DRX.…”

Section: Hot Deformation and Drx Behaviormentioning

confidence: 99%

Study on Hot Deformation Behavior and Dynamic Recrystallization Mechanism of Cu‐Ti‐Fe Alloy

Wang,

Ren,

Wang

et al. 2023

Adv Eng Mater

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Hot compression experiments with the deformation temperatures of 750‐950 °C and the strain rates of 0.01‐10 s‐1 were carried out on a Gleeble‐3500 thermal‐mechanical simulator. The flow behavior and dynamic recrystallization (DRX) mechanism of the Cu‐Ti‐Fe alloy were systematically studied under different hot deformation conditions. According to the curves of flow stress and work hardening rate, the DRX critical condition of the alloy is obtained, and the critical stress value of DRX is small under high‐temperature and low‐strain rate. After fitting, the logarithmic values of the critical stress and critical strain have a linear relationship with lnZ, which indicates that the alloy is more prone to DRX at high temperatures and low strain rates. The Arrhenius constitutive model of the alloy was established, the linear correlation coefficient (R2) was 0.984. Combined with the microstructure of Cu‐Ti‐Fe alloy, the microstructure evolution characteristics and DRX mechanism were elucidated. The dominant mechanism of the alloy under the deformation temperature of 750–950 °C is the DRX mechanism. The LAGBs transform into HAGBs and continuous dynamic recrystallization (CDRX) grains form. Abundant dislocations gather near the HAGBs, causing grain boundaries to protrude. High‐temperature conditions make the dislocations disappear, forming discontinuous dynamic recrystallization (DDRX) grains.This article is protected by copyright. All rights reserved.

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“…Reportedly, the cold-rolling technique worked well for fine-tuning the HEAs' grain structure. Most of these investigations concentrated on the changes in texture and microstructure that occurred during the annealing process of HEAs made by cold rolling [27]. The 90% reduction in thickness of the cold-rolled AlCoCrFeNi 2.1 HEA demonstrates a significant boost in strength.…”

Section: Introductionmentioning

confidence: 99%

Oxidation of Fe35Mn21Ni20Cr12Al12 High Entropy Alloy in Dry Air

Mohamed,

Abd ElMoamen,

Yoo

et al. 2024

Alloys

Self Cite

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The isothermal oxidation of a Fe35Mn21Ni20Cr12Al12 high entropy alloy (HEA) was investigated in dry air for 50 h at 500, 600, and 700 °C after 90% cold rolling. The Fe35Mn21Ni20Cr12Al12 HEA behaves according to the linear oxidation rate with rate constants of 1 × 10−6, 3 × 10−6, and 7 × 10−6 g/(cm2·s) for oxidation at 500 °C, 600 °C, and 700 °C, respectively. The activation energy for oxidation of the HEA was calculated to be 60.866 KJ/mole in the 500–700 °C temperature range. The surface morphology and phase identification of the oxide layers were characterized. The formation of MnO2, Mn2O3, Mn3O4, Cr2O3, and Al2O3 in the oxide layers along with Fe2O3 is the key to the oxidation mechanism. The elemental mapping and line EDX scans were performed to identify the oxidation mechanisms.

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Hot deformation behavior and constitutive modeling of a cost-effective Al8Cr12Mn25Ni20Fe35 high-entropy alloy

Cited by 26 publications

References 67 publications

Constitutive Equation and Processing Map of CoCrFeNiMo_0.3 High Entropy Alloy Based on The Thermoplastic Deformation

Constitutive Equation and Processing Map of CoCrFeNiMo_0.3 High Entropy Alloy Based on The Thermoplastic Deformation

Study on Hot Deformation Behavior and Dynamic Recrystallization Mechanism of Cu‐Ti‐Fe Alloy

Oxidation of Fe35Mn21Ni20Cr12Al12 High Entropy Alloy in Dry Air

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Hot deformation behavior and constitutive modeling of a cost-effective Al8Cr12Mn25Ni20Fe35 high-entropy alloy

Cited by 26 publications

References 67 publications

Constitutive Equation and Processing Map of CoCrFeNiMo0.3 High Entropy Alloy Based on The Thermoplastic Deformation

Constitutive Equation and Processing Map of CoCrFeNiMo0.3 High Entropy Alloy Based on The Thermoplastic Deformation

Study on Hot Deformation Behavior and Dynamic Recrystallization Mechanism of Cu‐Ti‐Fe Alloy

Oxidation of Fe35Mn21Ni20Cr12Al12 High Entropy Alloy in Dry Air

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Constitutive Equation and Processing Map of CoCrFeNiMo_0.3 High Entropy Alloy Based on The Thermoplastic Deformation

Constitutive Equation and Processing Map of CoCrFeNiMo_0.3 High Entropy Alloy Based on The Thermoplastic Deformation