Effect of nickel addition on enhancing nano-structuring and suppressing TRIP effect in Fe40Mn40Co10Cr10 high entropy alloy during high-pressure torsion

Chandan, Avanish Kumar; Kishore, Kaushal; Hung, Pham Tran; Ghosh, Mainak; Chowdhury, Sandip Ghosh; Kawasaki, Megumi; Gubicza, Jenő

doi:10.1016/j.ijplas.2021.103193

Cited by 30 publications

(14 citation statements)

References 64 publications

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“…This change of the defect structure is associated with the phase transformation occurred in Fe 35 Mn 35 Co 10 Cr 10 Ni 10 during HPT. 62) Namely, the initial fcc structure transformed gradually to hcp, i.e., beside the dislocation glide transformation induced plasticity (TRIP) also contributed to deformation. Therefore, less dislocation was required for the same nominal strain of HPT than in the case of Fe 40 Mn 40 Co 10 Cr 10 where the structure remained full fcc.…”

Section: Development Of the Microstructure Of Mpeas During Spdmentioning

confidence: 99%

“…In addition, fcc-to-hcp phase transformation may occur for some compositions (e.g., in Co 20 Cr 26 Fe 20 Mn 20 Ni 14 and Fe 40 Mn 40 Co 10 Cr 10 ) during SPD-processing which can also influence the final grain size. 62,63) These compositions usually have a low SFE since an hcp crystal can form in an fcc structure if intrinsic stacking faults develop every second {111} planes. The minimum grain size achievable in MPEAs by SPDprocessing are listed in Table 2.…”

Section: Grain Refinement During Spdmentioning

confidence: 99%

“…In , can transform into an hcp phase at least partly during SPD as discussed in the former section. 62,63) Table 3 lists the phases before and after SPD for those MPEA compositions which exhibited phase transformation during SPD-processing. It is worth noting that not only a decomposition of the initial single phase may occur in MPEAs but the disappearance of the secondary phase can also be observed, as shown in Table 3 (see for Co 20 Cr 26 Fe 20 Mn 20 Ni 14 processed by HPT at RT).…”

Section: Grain Refinement During Spdmentioning

confidence: 99%

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Nanostructuring of Multi-Principal Element Alloys by Severe Plastic Deformation: from Fundamentals to an Improved Functionality

Gubicza

Hung

2023

Mater. Trans.

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Multi-principal element alloys (MPEAs) are in the forefront of materials science since their compositions can be found in the undiscovered central parts of phase diagrams. These materials contain 36 elements with similar fractions, i.e., the constituents do not play the classical solvent and solute roles in the alloys. This class of materials includes high entropy alloys (HEAs). Novel MPEA compositions often have unique and superior properties compared to conventional materials. It has been shown that the features of MPEAs can be further improved by nanostructuring using severe plastic deformation (SPD) techniques. In this study, the evolution of the microstructure in MPEAs during SPDprocessing (defect formation, grain refinement and phase transformation) is overviewed on the basis of the literature. The corresponding changes of the mechanical and physical properties, such as the strength, corrosion resistance and hydrogen diffusivity are discussed. In addition, the potential applications of SPD-processed MPEAs are presented.

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Section: Development Of the Microstructure Of Mpeas During Spdmentioning

confidence: 99%

Section: Grain Refinement During Spdmentioning

confidence: 99%

Section: Grain Refinement During Spdmentioning

confidence: 99%

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Nanostructuring of Multi-Principal Element Alloys by Severe Plastic Deformation: from Fundamentals to an Improved Functionality

Gubicza

Hung

2023

Mater. Trans.

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“…Phase transformation-assisted alloys have motivated investigations due to their exceptional mechanical properties and excellent application potential in advanced technologies [1][2][3][4][5][6] . However, a key bottleneck that hinders their widespread applications is the traditional strength-ductility trade-off [7] .…”

Section: Introductionmentioning

confidence: 99%

“…The dualphase non-equiatomic FeMnCoCr CCA contains face-centered cubic (FCC) γ and hexagonal close-packed (HCP) ε phases, which are obtained by successive cold rolling, annealing above 900 °C and water quenching [8] . Owing to the metastable FCC γ and stable HCP ε phases at room temperature, the mechanical deformation can actively promote the transformation from FCC γ to HCP ε phase [4,5,11] . Such a phase transformation mainly contributes to the work hardening and thus optimizes the strength and ductility simultaneously.…”

Section: Introductionmentioning

confidence: 99%

Detwinning/twin growth-induced phase transformation in a metastable compositionally complex alloy

Lu¹,

An²,

Liebscher³

2022

Microstructures

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Extensive experiments have shown that the transformation from the face-centered cubic to hexagonal close-packed ε phase usually occurs around coherent Σ3 boundaries. However, in this letter, we reveal a different transformation mechanism in a metastable dual-phase compositionally complex alloy via a systematic high-resolution scanning transmission electron microscopy analysis. The face-centered cubic γ matrix can be transformed to the hexagonal close-packed ɛ phase (as small as one unit) around an incoherent Σ3 boundary (~30 nm), i.e., the facet of the coherent Σ3 boundary. This transformation is assisted by the detwinning/twin growth of a coherent Σ3 boundary during annealing treatment (900 °C for 60 min).

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Combinatorial Design of Novel Multiprincipal Element Alloys Using Experimental Techniques

Gubicza

2023

Adv Eng Mater

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Multiprincipal element alloys (MPEAs) including high‐entropy alloys are in the focus of materials science since many MPEA compositions exhibit outstanding mechanical and physical properties. These alloys contain 3–6 constituents with similar fractions; therefore, MPEAs correspond to the unexplored middle part of the phase diagrams. The phase composition and the performance of MPEAs are strongly influenced by their chemistry. Thus, it is very important to reveal the correlation between the composition, the structure, and the properties of MPEAs. On the other hand, this task is challenging due to the vast composition space of these alloys. The processing and characterization of combinatorial specimens can yield a fast mapping of compositional libraries of MPEAs. Herein, the experimental techniques developed for manufacturing and investigation of these alloys are overviewed and the results are critically discussed. Finally, further development directions in the field of combinatorial MPEAs are recommended in order to improve the study of the different alloy compositions.

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Effect of nickel addition on enhancing nano-structuring and suppressing TRIP effect in Fe40Mn40Co10Cr10 high entropy alloy during high-pressure torsion

Cited by 30 publications

References 64 publications

Nanostructuring of Multi-Principal Element Alloys by Severe Plastic Deformation: from Fundamentals to an Improved Functionality

Nanostructuring of Multi-Principal Element Alloys by Severe Plastic Deformation: from Fundamentals to an Improved Functionality

Detwinning/twin growth-induced phase transformation in a metastable compositionally complex alloy

Combinatorial Design of Novel Multiprincipal Element Alloys Using Experimental Techniques

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