Effects of Al addition on structural evolution and mechanical properties of the CrCoNi medium-entropy alloy

Lu, Wenjie; X, Luo; Yang, Yanqing; Zhang, Jingting; Huang, Bin

doi:10.1016/j.matchemphys.2019.121841

Cited by 57 publications

(7 citation statements)

References 55 publications

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“…The excellent mechanical properties of the CoCrNi alloy are strongly dependent on the orientation. The uniaxial tensile responses of three orientations ( [111], [110] and [123]) were investigated [Figure 5] [66] . At the early stage of deformation, the single slip dominated in the [123] orientation.…”

Section: Figurementioning

confidence: 99%

“…At the early stage of deformation, the single slip dominated in the [123] orientation. Subsequently, multiple slip and nano-twinning were prominent in the [111] orientation. Nano-twinning prevailed as early as 4% strain along the [110] orientation.…”

Section: Figurementioning

confidence: 99%

“…It was observed that a larger CRSS corresponded to a higher strength and ductility. [110], [111] and [123] orientations deformed to failure under uniaxial tensile loading. Evolution of strain hardening rate as a function of true strain in the (B) [110], (C) [111] and (D) [123] orientations [66] .…”

Section: Factors Affecting Tensile Responsementioning

confidence: 99%

“…Alloying elements have a first-order effect on strength and ductility [111] . In HEAs, adjusting one element may have profound effects on the mechanical properties.…”

Section: Alloyingmentioning

confidence: 99%

“…A structural component in service may fracture in three basic modes, i.e., mode I opening, mode II in-plane shear and mode III out-of-plane shear, and their combinations [111] . According to reports, at RT and liquid nitrogen temperature, the mode I fracture toughness of some FCC HEAs was comparable to that of the best stainless steels [6,27] .…”

Section: Fracture Toughnessmentioning

confidence: 99%

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A critical review of the mechanical properties of CoCrNi-based medium-entropy alloys

Xu¹,

Wang²,

Li³

et al. 2022

Microstructures

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The CoCrFeMnNi alloy is one of the most notable first-generation high-entropy alloys and is also known as a Cantor alloy. This alloy was first proposed in 2004 and shows promising performance at cryogenic temperatures (CTs). Subsequent research has indicated that the equiatomic ternary CoCrNi medium-entropy alloy (MEA), as a subset of the Cantor alloy family, has better mechanical properties than the CoCrFeMnNi alloy. Interestingly, both the strength and ductility of the CoCrNi MEA are higher at CTs than at room temperature. CoCrNi-based alloys have attracted considerable attention in the metallic materials community and it is therefore important to generalize and summarize the latest progress in CoCrNi-based MEA research. The present review initially briefly introduces the discovery of the CoCrNi MEA. Subsequently, its tensile response and deformation mechanisms are summarized. In particular, the effects of parameters, such as critical resolved shear stress, stacking fault energy and short-range ordering, on the deformation behavior are discussed in detail. The methods for strengthening the CoCrNi MEA are then reviewed and divided into two categories, namely, modifying microstructures and adjusting chemical compositions. In addition, the mechanical performance of CoCrNi-based MEAs, including their dynamic shear properties, creep behavior and fracture toughness, is also deliberated. Finally, the development prospects of CoCrNi-based MEAs are proposed.

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Section: Figurementioning

confidence: 99%

Section: Figurementioning

confidence: 99%

Section: Factors Affecting Tensile Responsementioning

confidence: 99%

“…Alloying elements have a first-order effect on strength and ductility [111] . In HEAs, adjusting one element may have profound effects on the mechanical properties.…”

Section: Alloyingmentioning

confidence: 99%

Section: Fracture Toughnessmentioning

confidence: 99%

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A critical review of the mechanical properties of CoCrNi-based medium-entropy alloys

Xu¹,

Wang²,

Li³

et al. 2022

Microstructures

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Dynamic Mechanical Behavior and Microstructure of the Al_0.1CoCrFeNiTi_x High‐Entropy Alloys

Tian

Wang

et al. 2021

Adv Eng Mater

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The effects of the microstructure and the strain rate on the compression behavior of the Al0.1CoCrFeNiTi x (x = 0.1, 0.3, and 0.5 in molar ratio) high‐entropy alloys (HEAs) are investigated. Compared with the Al0.1CoCrFeNiTi0.1 with the single‐phase face‐centered cubic (FCC) structure and the Al0.1CoCrFeNiTi0.3 HEAs, both the yield strength (YS) and the work hardening ability of the Al0.1CoCrFeNiTi0.5 HEA are enhanced significantly under the quasistatic condition. This is due to a combination of the solid‐solution strengthening and sigma‐phase precipitation hardening mechanisms. The strong work hardening of the Al0.1CoCrFeNiTi0.1 HEAs under quasistatic loading is attributed to the existence of the dislocation substructures (high‐density dislocation walls and dislocation cells) and the deformation twinning accompanying homogeneous deformation. A significant strain rate sensitivity on the YS is obtained as a result of the phonon drag effect under dynamic loading. Different from the quasistatic condition, the dynamic grain refinement and the nanoscale twins inside the grains are the main microstructure characteristics in the dynamic deformation process.

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Microstructure and Wear Behavior of High-Carbon Concentration CrCoNi Multi-principal Element Alloys

Bertoli

Koga

Puosso

et al. 2021

Metall Mater Trans A

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Effects of Al addition on structural evolution and mechanical properties of the CrCoNi medium-entropy alloy

Cited by 57 publications

References 55 publications

A critical review of the mechanical properties of CoCrNi-based medium-entropy alloys

A critical review of the mechanical properties of CoCrNi-based medium-entropy alloys

Dynamic Mechanical Behavior and Microstructure of the Al_0.1CoCrFeNiTi_x High‐Entropy Alloys

Microstructure and Wear Behavior of High-Carbon Concentration CrCoNi Multi-principal Element Alloys

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Effects of Al addition on structural evolution and mechanical properties of the CrCoNi medium-entropy alloy

Cited by 57 publications

References 55 publications

A critical review of the mechanical properties of CoCrNi-based medium-entropy alloys

A critical review of the mechanical properties of CoCrNi-based medium-entropy alloys

Dynamic Mechanical Behavior and Microstructure of the Al0.1CoCrFeNiTix High‐Entropy Alloys

Microstructure and Wear Behavior of High-Carbon Concentration CrCoNi Multi-principal Element Alloys

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Dynamic Mechanical Behavior and Microstructure of the Al_0.1CoCrFeNiTi_x High‐Entropy Alloys