Effects of Al alloying on microstructure and mechanical properties of VCoNi medium entropy alloy

Tian, Jin; Tang, Kai; Wu, Yake; Cao, Tinghui; Pang, Jianbo; Jiang, F.

doi:10.1016/j.msea.2021.141054

Cited by 45 publications

(15 citation statements)

References 58 publications

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“…Figure 2 plots the product of ultimate tensile strength (UTS) × elongation to fracture (EL) (i.e., an energy necessary to obtain fracture) versus the yield strength σ Y for various single-and multiphase HEAs/MEAs in comparison to commercially available austenitic steels and Ni-based alloys. 10,15,[62][63][64][65][66][67][68][69][70][71][72][73] A wide range of mechanical properties can be obtained: some alloys performing better for long-term application (high yield strength), some being more appropriate for emergency situations (high product of ultimate tensile strength and elongation to failure) (e.g., a car crash). Some show a great balance between the two aspects.…”

Section: Multiphase Heas and Meas With Fcc Matrixmentioning

confidence: 99%

“…This approach leads to particularly interesting HEAs and MEAs at room temperature in comparison to commercially available alloys. 10,15,[62][63][64][65][66][67][68][69][70][71][72][73] behavior in an emergency case, the product UTS × EL is high in carbide strengthened HEAs. Figure 3 presents a few examples of mechanical data for multiphase HEAs and MEAs at elevated temperatures (~ 973 K) in comparison to a commercially available austenitic steel and Ni-based alloys.…”

Section: Multiphase Heas and Meas With Fcc Matrixmentioning

confidence: 99%

“…Figure 2. Comparison of tensile data of fcc single-and multiphaseHEAs and MEAs at room temperature in comparison to commercially available alloys 10,15,[62][63][64][65][66][67][68][69][70][71]…”

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confidence: 99%

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Uniaxial mechanical properties of face-centered cubic single- and multiphase high-entropy alloys

Inui

Kishida

et al. 2022

MRS Bulletin

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Since the high entropy concept was proposed at the beginning of the millennium, the research focus of this alloy family has been wide ranging. The initial search for single-phase alloys has expanded with the aim of improving mechanical properties. This can be achieved by several strengthening mechanisms such as solid-solution hardening, hot and cold working and precipitation hardening. Both single- and multiphase high- and medium-entropy alloys can be optimized for mechanical strength via several processing routes, as is the case for conventional alloys with only one base element, such as steels or Ni-based superalloys. Graphical abstract

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Section: Multiphase Heas and Meas With Fcc Matrixmentioning

confidence: 99%

Section: Multiphase Heas and Meas With Fcc Matrixmentioning

confidence: 99%

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Uniaxial mechanical properties of face-centered cubic single- and multiphase high-entropy alloys

Inui

Kishida

et al. 2022

MRS Bulletin

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“…The addition of Al in the FeCoNiCrMn alloy led to an increase in yield strength from 200 MPa to 500 MPa. Similarly, using the CALPHAD method, Tian et al have studied the phase diagrams of VCoNi MEA alloyed with Al and developed several alloys, finding that for the Al7(VCoNi) alloy the yield strength can reach 1634 MPa, compared to 787 MPa in the VCoNi alloy [44].…”

Section: Meas As Structural Materialsmentioning

confidence: 99%

A Fresh Perspective on Medium Entropy Alloys Applications as Coating and Coating Substrate

Nartita¹,

Ioniță²,

Demetrescu³

et al. 2022

AnnalsARSciPhysChem

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In order to evolve as a society we need increasingly efficient technologies and implicitly materials with great performance that promote safety and sustainability. The discovery of high entropy alloys was received with much enthusiasm due to the possibility of designing new materials with improved properties, that could be used in applications that require extreme conditions or a very specific combination of properties. As the research in this area is continuously increasing and the results are very promising, this review focuses on the most recent investigations on medium entropy alloys (MEAs) applications, highlighting their properties, but taking into consideration other factors, such as economic and environmental factors. Additionally, considering the high cost associated with MEAs fabrication, MEA coatings are also explored, as they are nowadays regarded as a more convenient procedure to obtain the required properties for various substrate materials.

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“…This presents an exciting promise in developing lightweight novel alloys (due to the low density of Al) with ultrastrong mechanical properties. While this paper was under review, a recent paper was published, where Al addition to VCoNi resulted in a transition from an fcc phase to an fcc + bcc dual-phase structure ( 16 ).…”

Section: Introductionmentioning

confidence: 99%

A dual-phase alloy with ultrahigh strength-ductility synergy over a wide temperature range

et al. 2021

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High-entropy alloys (HEAs), as an emerging class of materials, have pointed a pathway in developing alloys with interesting property combinations. Although they are not exempted from the strength-ductility trade-off, they present a standing chance in overcoming this challenge. Here, we report results for a precipitation-strengthening strategy, by tuning composition to design a CoNiV-based face-centered cubic/B2 duplex HEA. This alloy sustains ultrahigh gigapascal-level tensile yield strengths and excellent ductility from cryogenic to elevated temperatures. The highest specific yield strength (~150.2 MPa•cm 3 /g) among reported ductile HEAs is obtained. The ability of the alloy presented here to sustain this excellent strength-ductility synergy over a wide temperature range is aided by multiple deformation mechanisms i.e., twins, stacking faults, dynamic strain aging, and dynamic recrystallization. Our results open the avenue for designing precipitation-strengthened lightweight HEAs with advanced strength-ductility combinations over a wide service temperature range.

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Effects of Al alloying on microstructure and mechanical properties of VCoNi medium entropy alloy

Cited by 45 publications

References 58 publications

Uniaxial mechanical properties of face-centered cubic single- and multiphase high-entropy alloys

Uniaxial mechanical properties of face-centered cubic single- and multiphase high-entropy alloys

A Fresh Perspective on Medium Entropy Alloys Applications as Coating and Coating Substrate

A dual-phase alloy with ultrahigh strength-ductility synergy over a wide temperature range

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