Deformation Behavior of Al0.25CoCrFeNi High-Entropy Alloy after Recrystallization

Hou, Jinxiong; Zhang, Min; Yang, Huijun; Qiao, Junwei

doi:10.3390/met7040111

Cited by 32 publications

(14 citation statements)

References 48 publications

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“…It is worth noting that the VEC criterion for phase boundary prediction seems to work unsatisfactorily for Mn-containing HEA systems [20], which means the different value of VEC criterion for the phase boundary prediction. [27][28][29][30]34,35]. The results indicate that a few additions of Mo and Al do not reduce the value of SFE enough to induce the phase transition during tensile deformation in Co-Cr-Fe-Ni system.…”

Section: Plastic Deformation Mechanism Transitionmentioning

confidence: 90%

Transformation Induced Plasticity Effects of a Non-Equal Molar Co-Cr-Fe-Ni High Entropy Alloy System

Fang

Chang

et al. 2018

Metals

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Metastability-engineering strategy is an important topic for high entropy alloys (HEAs), owing to the transformation-induced plasticity effect (TRIP). In this work, TRIP effects of Co-Cr-Fe-Ni HEAs are investigated. Results indicate the tensile deformation-induced martensitic transformation occurs in Co 35 Cr 25 Fe 40−x Ni x (x = 0-15 at %) HEAs. The excellent combination of tensile strength (760 MPa-1000 MPa) and elongation (65-35%) owe to solid solution strengthening of Co and Cr, and the TRIP effect. In non-equal molar Co-Cr-Fe-Ni systems, with the decrease of Ni content, the values of stacking fault energy (SFE) decrease; thus, TRIP phenomena occurs. Based on the experimental investigation in three different regions of the Co-Cr-Fe-Ni multicomponent phase diagram, the face-centered cubic structured Co-Cr-Fe-Ni HEAs with VEC of~8.0 is more metastable, and TRIP phenomena are more likely to occur.

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Section: Plastic Deformation Mechanism Transitionmentioning

confidence: 90%

Transformation Induced Plasticity Effects of a Non-Equal Molar Co-Cr-Fe-Ni High Entropy Alloy System

Fang

Chang

et al. 2018

Metals

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“…These particular structures with proper composition may contribute to the advantages of HEAs in such aspects as high mechanical strength, good ductility, high wear resistance, good resistance to oxidation and corrosion, etc. [6][7][8], providing more possible engineering applications in various fields.…”

Section: Introductionmentioning

confidence: 99%

Effects of Boron Content on Microstructure and Wear Properties of FeCoCrNiBx High-Entropy Alloy Coating by Laser Cladding

Liu

Zhao

et al. 2019

Applied Sciences

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The FeCoCrNiBx high-entropy alloy (HEA) coatings with three different boron (B) contents were synthesized on Q245R steel (American grade: SA515 Gr60) by laser cladding deposition technology. Effects of B content on the microstructure and wear properties of FeCoCrNiBx HEA coating were investigated. In this study, the phase composition, microstructure, micro-hardness, and wear resistance (rolling friction) were investigated by X-ray diffraction (XRD), a scanning electron microscope (SEM), a micro hardness tester, and a roller friction wear tester, respectively. The FeCoCrNiBx coatings exhibited a typical dendritic and interdendritic structure, and the microstructure was refined with the increase of B content. Additionally, the coatings were found to be a simple face-centered cubic (FCC) solid solution with borides. In terms of mechanical properties, the hardness and wear resistance ability of the coating can be enhanced with the increase of the B content, and the maximum hardness value of three HEA coatings reached around 1025 HV0.2, which is higher than the hardness of the substrate material. It is suggested that the present fabricated HEA coatings possess potentials in application of wear resistance structures for Q245R steel.

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“…A new model [7] has been proposed to describe CDRX based on the dislocation density in the hot rolling of AZ31 magnesium alloys. Moreover, numerous DRX studies have been carried out for alloy microstructures [8,9]. Manonukul and Dunne [10] investigated the initiation of DRX under the inhomogeneous stress state in pure copper.…”

Section: Introductionmentioning

confidence: 99%

Recrystallization Microstructure Prediction of a Hot‐Rolled AZ31 Magnesium Alloy Sheet by Using the Cellular Automata Method

Chen

Zhao

et al. 2019

Mathematical Problems in Engineering

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A large reduction rolling process was used to obtain complete dynamic recrystallization (DRX) microstructures with fine recrystallization grains. Based on the hyperbolic sinusoidal equation that included an Arrhenius term, a constitutive model of flow stress was established for the unidirectional solidification sheet of AZ31 magnesium alloy. Furthermore, discretized by the cellular automata (CA) method, a real-time nucleation equation coupled flow stress was developed for the numerical simulation of the microstructural evolution during DRX. The stress and strain results of finite element analysis were inducted to CA simulation to bridge the macroscopic rolling process analysis with the microscopic DRX activities. Considering that the nucleation of recrystallization may occur at the grain and R-grain boundary, the DRX processes under different deformation conditions were simulated. The evolution of microstructure, percentages of DRX, and sizes of recrystallization grains were discussed in detail. Results of DRX simulation were compared with those from electron backscatter diffraction analysis, and the simulated microstructure was in good agreement with the actual pattern obtained using experiment analysis. The simulation technique provides a flexible way for predicting the morphological variations of DRX microstructure accompanied with plastic deformation on a hot-rolled sheet.

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Deformation Behavior of Al0.25CoCrFeNi High-Entropy Alloy after Recrystallization

Cited by 32 publications

References 48 publications

Transformation Induced Plasticity Effects of a Non-Equal Molar Co-Cr-Fe-Ni High Entropy Alloy System

Transformation Induced Plasticity Effects of a Non-Equal Molar Co-Cr-Fe-Ni High Entropy Alloy System

Effects of Boron Content on Microstructure and Wear Properties of FeCoCrNiBx High-Entropy Alloy Coating by Laser Cladding

Recrystallization Microstructure Prediction of a Hot‐Rolled AZ31 Magnesium Alloy Sheet by Using the Cellular Automata Method

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