Microstructural Evolution and Mechanical Properties of Al0.5CoCrFeNi High-Entropy Alloy after Cold Rolling and Annealing Treatments

Moghanni, Hossein; Dehghani, K.

doi:10.1007/s11665-021-05886-y

Cited by 27 publications

(6 citation statements)

References 49 publications

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“…[41] Figure 10a shows a plot of straight comparisons of the engineering tensile yield strength (σ 0.2 ) and elongation to failure (δ) of the ascast (Fe 40 Ni 30 Cr 20 Al 10 ) 100Àx Ti x HEAs samples with those of as-cast HEAs reported in the literature. Based on this plot, it reveals that the tensile strength-ductility combinations of the (Fe 40 Ni 30 Cr 20 Al 10 ) 96 Ti 4 HEAs seems to be better than most of other as-cast HEAs, including AlCoCrFeNi 2.1 , [42] AlCoCrFeNi 2.1 Ti 0.15 , [43] AlCoCrFeNi 3 , [44] AlCo 2 CrFeNi 2 , [44] AlCoCrFe 2 Ni 2 , [44] Al 0.25 CoCrFeNi, [45] Al 0.5 CoCrFeNi, [46] Al 2 (CoCrFeNi) 14 , [47] Al 0.8 CoCr 0.6 Fe 0.7 Ni 1.5 , [48] Al 0.8 CrFeNi 2.2 , [49] Al 0.9 CrFeNi 2.1 , [49] AlCrFeNi 2 , [49] AlCrFeNi 3.1 , [50] (Fe 40 Mn 40 Ni 10 Cr 10 ) 95 Al 5 , [51] Fe 36 Mn 21 Cr 18 Ni 15 Al 10 , [52] CoCrFeNiMo x , [53] CoCrFeNiNb x , [54] and CoCrFeNiNb x Mo 0.4Àx . [55] Moreover, for wide applications, the cost of raw materials is worth to be into account.…”

Section: Strengthening Mechanismsmentioning

confidence: 99%

Microstructural Evolution and Mechanical Behavior of Co‐Free (Fe₄₀Ni₃₀Cr₂₀Al₁₀)_100−xTi_x High‐Entropy Alloys

Liu,

Jiang,

Chen

et al. 2023

Adv Eng Mater

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In this work, microstructural evolution and mechanical behavior of Co‐free (Fe40Ni30Cr20Al10)100‐x Ti x (x = 0, 2, 4, 6 and 8 at.%) high‐entropy alloys (HEAs) were investigated. All as‐cast HEAs consist of face‐centered cubic (FCC) and body‐centered cubic (BCC) structured phases, wherein the BCC‐structured phase is composed of disordered BCC (A2) and ordered BCC (B2) phases. The HEAs show FCC dendrite and BCC inter‐dendrite microstructure when x ≤ 4. As the Ti content increases to 6 and 8 at.%, the microstructure has evolved from dendrite structures to complex lamellar structures, leading to a significant loss in ductility. With the increase of Ti, the strength was enhanced with the sacrifice of ductility. The (Fe40Ni30Cr20Al10)96Ti4 alloy exhibits promising combinations of strength and ductility, displaying a yield strength of 680 MPa, an ultimate tensile strength of 1132 MPa, and a total elongation of 16.6%. The simple FCC+BCC dendrite microstructure and optimal content of the BCC‐structured region containing A2+B2 phases are responsible for the excellent tensile properties of the as‐cast (Fe40Ni30Cr20Al10)96Ti4 HEA. Our work suggests that good combinations of strength and ductility of low‐cost Co‐free FeNiCrAl‐based HEAs can be achieved by tailoring Ti addition.This article is protected by copyright. All rights reserved.

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Section: Strengthening Mechanismsmentioning

confidence: 99%

Microstructural Evolution and Mechanical Behavior of Co‐Free (Fe₄₀Ni₃₀Cr₂₀Al₁₀)_100−xTi_x High‐Entropy Alloys

Liu,

Jiang,

Chen

et al. 2023

Adv Eng Mater

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“…For more clarification of the mechanical properties, compression tests of the six alloys in their as-cast condition were performed and the results are shown in Figure 11. Firstly, it is important to record here that the casting defects such as pores, segregation, and uneven residual stresses can negatively impact the mechanical properties [50]. Alloy 1 was damaged during the test due to its higher brittleness.…”

Section: Mechanical Propertiesmentioning

confidence: 99%

Phase Prediction, Microstructure and Mechanical Properties of Fe–Mn–Ni–Cr–Al–Si High Entropy Alloys

Mahmoud

Shaharoun

Gepreel

et al. 2022

Metals

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The selection of high-entropy alloys (HEAs), which are relatively lightweight and have unique mechanical properties, remains a substantial challenge. In this study, six new HEAs were designed from the relatively low-cost Fe–Mn–Ni–Cr–Al–Si system using Thermo-Calc software, and then manufactured using a casting process. The effects of the atomic ratio of the alloying elements on the microstructures and mechanical properties of these alloys in the as-cast condition were systematically investigated. Brittle body-centered cubic BCC/B2 and silicide phases were found in relatively large amounts in the form of dendritic structure within large equiaxed grains with fine needle-shaped phases in the Fe30Mn15Ni20Cr15Al10Si10 and Fe35Mn15Ni20Cr15Al10Si5 alloys, in addition to the face-centered cubic (FCC) phase. When the contents of Mn and Ni were increased in the Fe35Mn25Ni15Cr15Al5Si5 and Fe35Mn20Ni20Cr15Al5Si5 alloys, the amounts of brittle phases were reduced; however, the ductile FCC phase is not significant. The FCC phase amount, which appeared as a honeycombed structure, was more than enough when the Si content was decreased to 3%. Broad relationships between the chemical composition of the alloys, especially the Si content, and the hardness and compression properties’ measurements were established. As the Si content decreased, both the hardness and compression properties of the resulting alloy also decreased. The experimental observation of the six HEAs matched the equilibrium phases predicted by the Thermo-Calc calculations.

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“…Moreover, thermal-mechanical processing is an effective method to eliminate some as-cast defects, refine the structure, and promote the formation of precipitates, thus optimizing the microstructure and improving mechanical properties [18][19][20]. For instance, annealing for the rolled sample produces complete, recrystallized, ultrafine grains and annealing twins, thus improving the strength and ductility [21].…”

Section: Introductionmentioning

confidence: 99%

Improving Mechanical Properties of Fe-Mn-Co-Cr High-Entropy Alloy via Annealing after Cold Rolling

Lv,

Song,

Wang

et al. 2024

Materials

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The as-cast (Fe50Mn30Co10Cr10)97C2Mo1 HEA (high entropy alloy) was prepared and cold-rolled at 70%. Subsequently, annealing heat treatment at different temperatures (900 °C, 950 °C, 1000 °C) was carried out. The microstructure evolution and mechanical properties of the HEA were systematically investigated. The results showed that the HEA annealed at 900 °C and 950 °C exhibited uneven grain size and rich σ precipitation phase at grain boundaries. The grains began to grow and complete recrystallization, and no σ phases were observed in HEA annealed at 1000 °C, which resulted in a higher tensile strength of ~885 MPa and elongation of ~68% compared with other annealed HEAs. The higher volume fraction of annealing twins with 60°<111> orientation was produced in HEA annealed at 1000 °C, which enhanced the tensile strength and plasticity via the Twinning-induced plasticity (TWIP) mechanism.

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Microstructural Evolution and Mechanical Properties of Al0.5CoCrFeNi High-Entropy Alloy after Cold Rolling and Annealing Treatments

Cited by 27 publications

References 49 publications

Microstructural Evolution and Mechanical Behavior of Co‐Free (Fe₄₀Ni₃₀Cr₂₀Al₁₀)_100−xTi_x High‐Entropy Alloys

Microstructural Evolution and Mechanical Behavior of Co‐Free (Fe₄₀Ni₃₀Cr₂₀Al₁₀)_100−xTi_x High‐Entropy Alloys

Phase Prediction, Microstructure and Mechanical Properties of Fe–Mn–Ni–Cr–Al–Si High Entropy Alloys

Improving Mechanical Properties of Fe-Mn-Co-Cr High-Entropy Alloy via Annealing after Cold Rolling

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Microstructural Evolution and Mechanical Properties of Al0.5CoCrFeNi High-Entropy Alloy after Cold Rolling and Annealing Treatments

Cited by 27 publications

References 49 publications

Microstructural Evolution and Mechanical Behavior of Co‐Free (Fe40Ni30Cr20Al10)100−xTix High‐Entropy Alloys

Microstructural Evolution and Mechanical Behavior of Co‐Free (Fe40Ni30Cr20Al10)100−xTix High‐Entropy Alloys

Phase Prediction, Microstructure and Mechanical Properties of Fe–Mn–Ni–Cr–Al–Si High Entropy Alloys

Improving Mechanical Properties of Fe-Mn-Co-Cr High-Entropy Alloy via Annealing after Cold Rolling

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Microstructural Evolution and Mechanical Behavior of Co‐Free (Fe₄₀Ni₃₀Cr₂₀Al₁₀)_100−xTi_x High‐Entropy Alloys

Microstructural Evolution and Mechanical Behavior of Co‐Free (Fe₄₀Ni₃₀Cr₂₀Al₁₀)_100−xTi_x High‐Entropy Alloys