Cooling rate effect on microstructure and mechanical properties of Al x CoCrFeNi high entropy alloys

Lv, Yukun; Hu, Ruyi; Yao, Zhihao; Chen, Jian; Xu, Dapeng; Liu, Yong; Fan, Xing

doi:10.1016/j.matdes.2017.07.008

Cited by 86 publications

(26 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The dendrites and inter-dendrites have significant component segregations [40]. Solidification/ cooling rates have a significant influence on the microstructural evolution of as-cast HEAs [77]. The AlCoCrCuFeNi HEA fabricated by splat quenching with rapid solidification rate (10 6 -10 7 K s −1 ) possessed a single BCC phase with fine polycrystalline structures, whereas the ascast alloy had multi-phases with serious inter-dendritic segregation [78].…”

Section: Microstructuresmentioning

confidence: 99%

Science and technology in high-entropy alloys

2018

View full text Add to dashboard Cite

As human improve their ability to fabricate materials, alloys have evolved from simple to complex compositions, accordingly improving functions and performances, promoting the advancements of human civilization. In recent years, high-entropy alloys (HEAs) have attracted tremendous attention in various fields. With multiple principal components, they inherently possess unique microstructures and many impressive properties, such as high strength and hardness, excellent corrosion resistance, thermal stability, fatigue, fracture, and irradiation resistance, in terms of which they overwhelm the traditional alloys. All these properties have endowed HEAs with many promising potential applications. An in-depth understanding of the essence of HEAs is important to further developing numerous HEAs with better properties and performance in the future. In this paper, we review the recent development of HEAs, and summarize their preparation methods, composition design, phase formation and microstructures, various properties, and modeling and simulation calculations. In addition, the future trends and prospects of HEAs are put forward.

show abstract

Section: Microstructuresmentioning

confidence: 99%

Science and technology in high-entropy alloys

2018

View full text Add to dashboard Cite

show abstract

“…Owing to the lack of clear evidence, the sluggish diffusion effect is still a controversial topic. In addition, the cooling rate also had a close relationship with refining microstructure, changing the volume fraction of phase structure, as well as inducing the lattice strain in the phase structure 116,126,127…”

Section: Phase Engineering Of Heasmentioning

confidence: 99%

Phase Engineering of High‐Entropy Alloys

et al. 2020

View full text Add to dashboard Cite

High‐entropy alloys (HEAs) are based on five or more principal elements with equal or nearly equal molar fractions and possess many significant advantages over traditional alloys, including high strength and hardness, excellent corrosion resistance, outstanding thermal stability, and irradiation resistance. Phase structure plays a vital role in determining the property of HEAs. For further enhancing the performance of HEAs in various application fields, a controllable synthesis with desired phases is required. In this review, the diverse phase structures of HEAs and the related properties are first introduced. Then, alternative tuning strategies to promote the desired phase structure of HEAs are focused upon. Property adjusting of phase‐engineered HEAs is also discussed in depth. Lastly, some insights into the challenges and future prospects in this rapidly emerging research field are provided.

show abstract

“…This promotes the formation of deformation twins, which lead to high work hardening rates [9,11,12]. Al x CoCrFeNi HEAs show excellent structural stability [13] and mechanical properties [15,16,17,18,19,20,21] over the range of temperatures. Also, corrosion and wear resistance of Al x CoCrFeNi HEA is similar to the conventional alloys like AISI 304 stainless steel and Inconel 718 alloys [22,23,24].…”

Section: Introductionmentioning

confidence: 99%

“…However, most of the studies involve the production of the HEA via casting (arc melting/induction melting) route [13,14,15,16,17,18,19,20,22,23,24].…”

Section: Introductionmentioning

confidence: 99%