Composition design of high entropy alloys using the valence electron concentration to balance strength and ductility

Chen, Ruirun; Qin, Guoliang; Zheng, Hongxing; Wang, Liang; Chiu, Yu-Lung; Ding, Hongsheng; Guo, Jingjie; Fu, Hengzhi

doi:10.1016/j.actamat.2017.10.058

Cited by 323 publications

(78 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…When the value of VEC is larger than 8, the stable phase is FCC; when the value is lower than 6.87, the stable phase is BCC; when the value is among 6.87 and 8, the stable phase is the coexist of mixed FCC and BCC phases 22. What is more, VEC also affects the atomic arrangement 19. When the Mo atoms, with a less valence electron than the matrix, were inserted into (CoCrCuFeNi) 100– x Mo x HEA, the alloy appeared a weak interaction, which broadened the distance between the Mo atom and the neighboring atoms.…”

Section: Phase Engineering Of Heasmentioning

confidence: 99%

“…In general, in HEAs, Al, Mo, Cr, Si with low VEC are often utilized as BCC stabilizer, and increasing their percentages can promote HEAs to generate some new phases. While the FCC stabilizer of Ni and Co with high VEC value is beneficial to make the system more stable 19…”

Section: Phase Engineering Of Heasmentioning

confidence: 99%

Section: Phase Engineering Of Heasmentioning

confidence: 99%

See 2 more Smart Citations

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

Section: Phase Engineering Of Heasmentioning

confidence: 99%

Section: Phase Engineering Of Heasmentioning

confidence: 99%

See 1 more Smart Citation

Phase Engineering of High‐Entropy Alloys

et al. 2020

View full text Add to dashboard Cite

show abstract

“…The concept of high entropy alloys (HEAs) was proposed by Yeh et al [1] and Cantor et al [2] respectively in 2004, and become a popular research direction in the metallic materials field promptly. The propose of HEAs breakthrough the limitations of traditional alloys because of their simple phase structure and excellent mechanical properties [3][4][5][6][7][8][9][10][11][12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

The effect of TiC addition on the microstructure and mechanical properties of Al0.6CrFe2Ni2 high entropy alloys

Zhang

et al. 2020

SN Appl. Sci.

View full text Add to dashboard Cite

To enhance the strength of single FCC phase high entropy alloys, TiC was selected as reinforced phase to improve the properties of high entropy alloys (HEAs). Therefore, a series of TiC/Al 0.6 CrFe 2 Ni 2 high entropy alloys with different TiC content which ranging from 0 to 5 vol% were prepared by vacuum arc melting furnace. The phase compositions, microstructures and mechanical properties of alloys were investigated detailedly. The results show that TiC has no effect on phase composition of the alloys, but the addition of ceramic phase TiC has an advantageous effect on the mechanical properties of alloys, the yield strength of TiC/Al 0.6 CrFe 2 Ni 2 HEAs increases due to the refined of grain size, when TiC content is 2.50 vol%, alloy has better properties, the yield strength and Vickers hardness are 576.93 MPa and 244 HV, respectively.

show abstract

“…Thus, it is of high interest and significance to explore the effect of magnetism upon quinary Mn-containing HEAs. Valence electron concentration (VEC) values are also known to relate to the phase stability of HEAs [31][32][33]. For instance, recently Fang et al [33] observed that when the VEC value fall into a certain rage, a change of the deformation mechanism is expected for Cr 25 Fe 40−x Co 35 Ni x (x = 0-15 at.…”

mentioning

confidence: 99%

Role of magnetic ordering for the design of quinary TWIP-TRIP high entropy alloys

Rao

et al. 2020

Phys. Rev. Materials

View full text Add to dashboard Cite

We reveal the impact of magnetic ordering on stacking fault energy (SFE) and its influence on the deformation mechanisms and mechanical properties in a class of nonequiatomic quinary Mn-containing compositional complex alloys or high entropy alloys (HEAs). By combining ab initio simulation and experimental validation, we demonstrate magnetic ordering as an important factor in the activation and transition of deformation modes from planar dislocation slip to TWIP (twinning-induced plasticity) and/or TRIP (transformation-induced plasticity). A wide compositional space of Cr 20 Mn x Fe y Co 20 Ni z (x + y + z = 60, at. %) was probed by density-functional theory calculations to search for potential alloys displaying the TWIP/TRIP effects. Three selected promising HEA compositions with varying Mn concentrations were metallurgically synthesized, processed, and probed for microstructure, deformation mechanism, and mechanical property evaluation. The differences in the deformation modes of the probed HEAs are interpreted in terms of the computed SFEs and their dependence on the predicted magnetic state, as revealed by ab initio calculations and validated by explicit magnetic measurements. It is found that the Mn content plays a key role in the stabilization of antiferromagnetic configurations which strongly impact the SFEs and eventually lead to the prevalent deformation behavior.

show abstract

Composition design of high entropy alloys using the valence electron concentration to balance strength and ductility

Cited by 323 publications

References 32 publications

Phase Engineering of High‐Entropy Alloys

Phase Engineering of High‐Entropy Alloys

The effect of TiC addition on the microstructure and mechanical properties of Al0.6CrFe2Ni2 high entropy alloys

Role of magnetic ordering for the design of quinary TWIP-TRIP high entropy alloys

Contact Info

Product

Resources

About