Enhanced strength-ductility synergy in a novel V-containing γ″-strengthened CoCrNi-based multi-component alloy

Pan, Yunwei; Dong, Anping; Zhou, Yang; Du, Dafan; Wang, Donghong; Zhu, Guoliang; Sun, Baode

doi:10.1016/j.msea.2021.141289

Cited by 27 publications

(4 citation statements)

References 48 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In addition to the CoCrNi-AlTi alloy, the CoCrNi-AlMo [142] and CoCrNi-NbV [143] alloys also exhibited an improvement in their properties by precipitation strengthening.…”

Section: Compound Addition Of Multiple Alloying Elementsmentioning

confidence: 99%

See 1 more Smart Citation

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

Xu¹,

Wang²,

Li³

et al. 2022

Microstructures

View full text Add to dashboard Cite

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.

show abstract

“…In addition to the CoCrNi-AlTi alloy, the CoCrNi-AlMo [142] and CoCrNi-NbV [143] alloys also exhibited an improvement in their properties by precipitation strengthening.…”

Section: Compound Addition Of Multiple Alloying Elementsmentioning

confidence: 99%

“…The gray area covers the alloys strengthened by modifying the microstructures. The dark blue area covers the alloys strengthened by optimizing the chemical composition[49,50,52,53,57,59,60,[90][91][92]105,107,108,110,115,117,120,123,129,133,141,142]…”

mentioning

confidence: 99%

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

Xu¹,

Wang²,

Li³

et al. 2022

Microstructures

View full text Add to dashboard Cite

show abstract

“…Therefore, it is important Metals 2023, 13, 936 2 of 14 to improve strength while retaining acceptable ductility. Various strengthening mechanisms, including solid-solution strengthening [33,34], dislocation and grain boundary (GB) strengthening [32,[35][36][37][38] and precipitation strengthening [39][40][41][42][43][44], are employed to improve the strength of FCC HEAs/MEAs. For example, Yoshida et al [37] prepared an ultra-finegrained CoCrNi MEA single-phase solid solution with an average grain size of 199 nm via high-pressure torsion plus subsequent annealing, achieving a yield strength (YS) of 993 MPa but with a uniform elongation (UE) of 4.9%, compared to a YS of 270 MPa and UE of 54.2% in the coarse-grained counterpart (average grain size 111 µm).…”

Section: Introductionmentioning

confidence: 99%

Achieving High Strength and Good Ductility in a Nb-Containing CoCrNi-Based High-Entropy Alloy by Grain Boundary and Precipitates Strengthening

Lin

2023

Metals

View full text Add to dashboard Cite

Face-centered cubic (FCC) high-entropy alloys (HEAs) have attracted considerable attention due to their excellent mechanical properties; however, an insufficient yield strength (YS) limits their widespread engineering applications. To improve the strength of FCC HEAs, the present work aims to develop fine-grained Nb-containing CoCrNi-based HEAs with precipitates. In the present work, a single-phase FCC CoCrNi1.5Nb0.2 HEA was processed by cold rolling followed by annealing at a higher temperature and aging at a lower temperature, yielding fine- and ultra-fine-grained FCC matrices and two types of precipitates: ultra-fine granular C15 Laves phase CoCrNb-based precipitates and ultra-fine lath-shaped D019-structured ε-Ni3Nb-based precipitates. The resultant alloy exhibits a combination of high strength (approximately 1409 MPa of yield strength) and good ductility (10.1% of uniform elongation). The contributions of grain boundary and precipitation strengthening to YS were analyzed and calculated. The mechanisms underlying good ductility were discussed.

show abstract

“…7 Obviously, HEA is still the most representative and dominant name. Researchers also utilize other terms, such as multiprincipal element alloys (MPEAs), 8 multicomponent alloys (MCAs), 9 concentrated solid solution alloys (CSSs), 10 complex concentrated alloys (CCAs), 11 etc. in the process of developing new alloys with broader compositions.…”

mentioning

confidence: 99%

Review—Corrosion-Resistant High-Entropy Alloy Coatings: A Review

Cheng¹,

Pan²,

Fu³

et al. 2021

J. Electrochem. Soc.

View full text Add to dashboard Cite

For a long time, the corrosion problem of materials has been an essential factor in restricting high-tech and national economic development. As an effective means of corrosion protection, surface coatings have drawn extensive attention in the field of material corrosion. Performance improvement and a new composition system of high-entropy alloys (HEAs) have made HEA coatings a research hotspot. HEA coatings inherit the “four core effects” of bulk HEAs, especially high entropy and sluggish diffusion, making high-quality coatings exhibit outstanding corrosion resistance. At present, many reports have focused on the performance of HEA coatings in the field of severe corrosion environments. This article reviews the process parameters and different element contents on the corrosion resistance of HEA coatings in recent years. This paper describes the advantages and excellent corrosion resistance of HEA coatings, including the preparation methods and classification of HEA coatings. Moreover, exploration of the corrosion behavior and the mechanism of HEA coatings are described, and the influence of passivation behavior and microstructure change on the corrosion resistance of HEA coatings are discussed. Finally, the prospect of research on corrosion-resistant HEA coatings is proposed, and possible future research directions and ideas are suggested.

show abstract

Enhanced strength-ductility synergy in a novel V-containing γ″-strengthened CoCrNi-based multi-component alloy

Cited by 27 publications

References 48 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

Achieving High Strength and Good Ductility in a Nb-Containing CoCrNi-Based High-Entropy Alloy by Grain Boundary and Precipitates Strengthening

Review—Corrosion-Resistant High-Entropy Alloy Coatings: A Review

Contact Info

Product

Resources

About