Local chemical fluctuation mediated ultra-sluggish martensitic transformation in high-entropy intermetallics

Wu, Yuan; Zhang, Fei; Li, Fengshou; Yang, Yi; Zhu, Jiaming; Wu, Hong‐Hui; Zhang, Yao; Qu, R.T.; Zhang, Zhefeng; Nie, Zhihua; Ren, Yang; Wang, Yandong; Liu, X. J.; Wang, Hui; Liu, Xiongjun

doi:10.1039/d1mh01612a

Cited by 21 publications

(3 citation statements)

References 63 publications

(73 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Since the first HESMA was reported by Firstov et al [13], up to now, most reported HESMAs have been tested in compression [14,15,17,18]. With our knowledge, the present Ti 30 Ni 30 Fe 10 Hf 10 Nb 20 EHEA was firstly reported to possess high strength and superelasticity in tension, which exhibits tensile strength as high as 1409 MPa and superelasticity as large as 3.1%.…”

Section: Resultsmentioning

confidence: 77%

“…It is attributed to high elastic modulus and high yield strength, which are originated from the core effects of HEAs, such as high entropy, sluggish diffusion and lattice distortion, etc. Subsequently, SME at an ultrahigh temperature, large elasticity at an elevated temperature and superelasticity at a low temperature have also been reported in the Ni-Pd-Ti-Zr-Hf [14], Ti-Hf-Zr-Cu-Ni [15,16] and Ti-Zr-Hf-Cu-Ni-Co [17] alloy systems, respectively. The interaction of multicomponents effectively suppresses the plastic deformation during the process of martensitic transformation, improving the performance of SME [18].…”

Section: Introductionmentioning

confidence: 89%

See 1 more Smart Citation

High Tensile Strength and Superelasticity of Directionally Solidified Ti30Ni30Fe10Hf10Nb20 Eutectic High Entropy Alloy

Zeng

Zhou

et al. 2022

Acta Metall. Sin. (Engl. Lett.)

View full text Add to dashboard Cite

Superelasticity has been widely used in various fields. High elastic limit simultaneously with large superelasticity is urgent in the critical applications. In this study, we have employed the high entropy alloy (HEA) concept to develop a new TiHfNiFe-Nb eutectic HEA (EHEA) based on the TiNi-Nb eutectic alloy. The results show the directional catkin-like microstructure with the fiber eutectic in the center and the lamella eutectic in the outside form along the directional solidification direction when the growth rate is 60 mm/h. The corresponding specimens display the high strength of 1409 MPa and superelasticity of 3.1% in tension at room temperature, which is attributed to the synergetic effect of high entropy, preferred orientation, ordered body-centered cubic (B2) phase and disordered body-centered cubic phase in the eutectic structure. This work sheds light on designing the high-performance superelastic function materials with EHEAs.

show abstract

Section: Resultsmentioning

confidence: 77%

Section: Introductionmentioning

confidence: 89%

High Tensile Strength and Superelasticity of Directionally Solidified Ti30Ni30Fe10Hf10Nb20 Eutectic High Entropy Alloy

Zeng

Zhou

et al. 2022

Acta Metall. Sin. (Engl. Lett.)

View full text Add to dashboard Cite

show abstract

“…To date, a great deal of work has been carried out on the L1 2 -type multicomponent precipitates and many encouraging achievements have been obtained [1][2][3][5][6][7]. It has been demonstrated that the precipitates precipitated from the matrix of multi-principal elements alloys (MPEAs) are rich in variable components.…”

Section: Introductionmentioning

confidence: 99%

Facilitating the strength-ductility balance in Ni₃Al via Fe co-substitution at two sites

Zhu,

Liu,

Feng

et al. 2023

J. Phys. D: Appl. Phys.

View full text Add to dashboard Cite

In this work, the effect of Fe substitution on the stability and deformation mechanism of Ni3Al was studied using first principles calculations. The results show that Fe is more likely to occupy the Ni site in terms of energy at low substitution concentrations, but occupying the Al site is more favorable for the stability of the system. The results also show that FeNi substitution brings ductility to the intermetallics while FeAl substitution ensures strength. In addition, the results for the generalized stacking fault energies at high substitution concentrations are different from those at low concentrations because of the change in the matrix. Therefore, dual-site substitution of Fe in appropriate proportions can help Ni3Al overcome the strength-ductility trade-off. This work provides useful knowledge for better design and utilization of Ni3Al-based multicomponent intermetallics.

show abstract

High‐Entropy Anti‐Perovskites with Enhanced Negative Thermal Expansion Behavior

Yuan,

Wang,

Sun

et al. 2024

Adv Funct Materials

View full text Add to dashboard Cite

The negative thermal expansion (NTE) materials, which can act as thermal‐expansion compensators to counteract the positive thermal expansion, have great applications merit in precision engineering. However, the exploration of NTE behavior with a wide temperature range has reached its upper ceiling through traditional doping strategies due to composition limitations. In this paper, the unique sluggish characteristics and extended optimization space in empirically screened high‐entropy anti‐perovskite (HEAP) are utilized to broaden the NTE temperature range. Typically, the NTE temperature range in Mn3Cu0.2Zn0.2Ga0.2Ge0.2Mn0.2N is broadened to ΔT = 235 K (5 K ≤ T ≤ 240 K), which is two or three times wider than that of traditional low‐entropy doping systems. The neutron diffraction analysis reveals a unique sluggish characteristic in magnetic phase transition which survives in an ultra‐wide temperature range of 5 K ≤ T ≤ 350 K (ΔT = 345 K). The sluggish characteristic is further experimentally proved to come from disturbed phase transition dynamics due to distortion in atomic spacing and chemical environmental fluctuation observed by the spherical aberration‐corrected electron microscope. The demonstration provides a unique paradigm for broadening the temperature range of NTE materials through entropy engineering.

show abstract

Local chemical fluctuation mediated ultra-sluggish martensitic transformation in high-entropy intermetallics

Abstract: Superelasticity associated with the martensitic transformation has found a broad range of engineering applications such as low-temperature devices in aerospace industry. Nevertheless, the narrow working temperature range and strong temperature...

Cited by 21 publications

References 63 publications

High Tensile Strength and Superelasticity of Directionally Solidified Ti30Ni30Fe10Hf10Nb20 Eutectic High Entropy Alloy

High Tensile Strength and Superelasticity of Directionally Solidified Ti30Ni30Fe10Hf10Nb20 Eutectic High Entropy Alloy

Facilitating the strength-ductility balance in Ni₃Al via Fe co-substitution at two sites

High‐Entropy Anti‐Perovskites with Enhanced Negative Thermal Expansion Behavior

Contact Info

Product

Resources

About

Local chemical fluctuation mediated ultra-sluggish martensitic transformation in high-entropy intermetallics

Abstract: Superelasticity associated with the martensitic transformation has found a broad range of engineering applications such as low-temperature devices in aerospace industry. Nevertheless, the narrow working temperature range and strong temperature...

Cited by 21 publications

References 63 publications

High Tensile Strength and Superelasticity of Directionally Solidified Ti30Ni30Fe10Hf10Nb20 Eutectic High Entropy Alloy

High Tensile Strength and Superelasticity of Directionally Solidified Ti30Ni30Fe10Hf10Nb20 Eutectic High Entropy Alloy

Facilitating the strength-ductility balance in Ni3Al via Fe co-substitution at two sites

High‐Entropy Anti‐Perovskites with Enhanced Negative Thermal Expansion Behavior

Contact Info

Product

Resources

About

Facilitating the strength-ductility balance in Ni₃Al via Fe co-substitution at two sites