Effect of Ti/Ni and Hf/Zr ratio on the martensitic transformation behavior and shape memory effect of TiNiHfZr alloys

Pang, Jianbo; Xu, Yangyang; Tian, Jin; Zhou, Yumei; Xue, Dezhen; Ding, Xiangdong; Sun, Jun

doi:10.1016/j.msea.2021.140850

Cited by 15 publications

(2 citation statements)

References 45 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[3][4][5][6][7][8][9][10][11] Especially, Ti-Ni-Zr, Ti-Ni-Hf and Ti-Ni-Zr-Hf alloys have been considered as good candidates of HTSMAs because of their relatively low-cost compared with the alloys containing a large amount of noble elements. [12][13][14] Recently, multi-principal element alloys or high-entropy alloys have attracted attentions due to the high strength caused by large lattice distortions. 15) It has also been shown that the design concept of high-entropy alloys can be beneficial for the improvement of properties of SMAs [16][17][18] and HTSMAs.…”

Section: Introductionmentioning

confidence: 99%

Development of Ni–Ti–Zr–Hf–(Nb, Ta) Multi-Principal Element High-Temperature Shape Memory Alloys with High Cold Workability

Tasaki,

Arai,

Miyazaki

et al. 2023

Mater. Trans.

View full text Add to dashboard Cite

Novel Ni-Ti-Zr-Hf-Nb and Ni-Ti-Zr-Hf-Ta high temperature shape memory alloys with multi-principal elements were developed, and differences in the effects of Nb and Ta on cold workability and shape memory properties were investigated. Constituent phases, microstructure, cold workability, transformation temperatures, shape memory properties were investigated in (Ni 50 Ti 30 Zr 10 Hf 10 ) 100¹x Nb x (x = 5, 10, 15) alloys and (Ni 50 Ti 30 Zr 10 Hf 10 ) 100¹y Ta y ( y = 5, 10, 15) alloys. Although both of Nb and Ta were effective to improve cold workability of Ni 50 Ti 30 Zr 10 Hf 10 alloy by forming a ductile ¢ phase with a disordered body-centered cubic structure, it was found that Ta was more effective than Nb in improving cold workability. The addition of Ta was also effective to suppress the formation of Ti 2 Ni-type intermetallic compound. Transformation temperatures were not significantly affected by the addition of Nb, while the transformation temperatures increased by the addition of Ta. According to thermal cycling tests, the (Ni 50 Ti 30 Zr 10 Hf 10 ) 85 Nb 15 , (Ni 50 Ti 30 Zr 10 Hf 10 ) 90 Ta 10 and (Ni 50 Ti 30 Zr 10 Hf 10 ) 85 Ta 15 alloys exhibited almost full shape recovery under 200 MPa. These alloys are suggested as promising candidates for practical high temperature shape memory alloys that can be worked at room temperature.

show abstract

Section: Introductionmentioning

confidence: 99%

Development of Ni–Ti–Zr–Hf–(Nb, Ta) Multi-Principal Element High-Temperature Shape Memory Alloys with High Cold Workability

Tasaki,

Arai,

Miyazaki

et al. 2023

Mater. Trans.

View full text Add to dashboard Cite

show abstract

“…On the other hand, the most widely used Ni–Ti-based SMAs have a temperature limit of about 373 K, owing to their low phase transformation temperature range [ 23 ]. Accordingly, high-temperature shape memory alloys (HTSMAs) that can recover their shapes at higher temperatures were developed by alloying the Ni–Ti system with Hf, Pd, Pt, Au, and Zr [ 13 , 14 , 15 , 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 , 33 ], or through the exploration of new alloy systems (e.g., Pd–Ti and Pt–Ti) [ 34 , 35 , 36 , 37 , 38 ].…”

Section: Introductionmentioning

confidence: 99%

Molecular Dynamics Simulations of PtTi High-Temperature Shape Memory Alloys Based on a Modified Embedded-Atom Method Interatomic Potential

Lee

Chun

2022

Materials

View full text Add to dashboard Cite

A new second nearest-neighbor modified embedded-atom model-based PtTi binary interatomic potential was developed by improving the pure Pt unary descriptions of the pre-existing interatomic potential. Specifically, the interatomic potential was developed focusing on the shape memory-associated phenomena and the properties of equiatomic PtTi, which has potential applications as a high-temperature shape memory alloy. The simulations using the developed interatomic potential reproduced the physical properties of the equiatomic PtTi and various intermetallic compound/alloy compositions and structures. Large-scale molecular dynamic simulations of single crystalline and nanocrystalline configurations were performed to examine the temperature- and stress-induced martensitic transformations. The results show good consistency with the experiments and demonstrate the reversible phase transformation of PtTi SMA between the cubic B2 austenite and the orthorhombic B19 martensite phases. In addition, the importance of anisotropy, constraint and the orientation of grains on the transformation temperature, mechanical response, and microstructure of SMA are presented.

show abstract

Noise‐Aware Active Learning to Develop High‐Temperature Shape Memory Alloys with Large Latent Heat

Tian,

Hu,

Dang

et al. 2024

Advanced Science

View full text Add to dashboard Cite

Shape memory alloys (SMAs) with large latent heat absorbed/released during phase transformation at elevated temperatures benefit their potential application on thermal energy storage (TES) in high temperature environment like power plants, etc. The desired alloys can be designed quickly by searching the vast component space of doped NiTi‐based SMAs via data‐driven method, while be challenging with the noisy experimental data. A noise‐aware active learning strategy is proposed to accelerate the design of SMAs with large latent heat at elevated phase transformation temperatures based on noisy data. The optimal noise level is estimated by minimizing the model error with incorporation of a range of noise levels as noise hyper‐parameters into the noise‐aware Kriging model. The employment of this strategy leads to the discovery of the alloy with latent heat of –36.08 J g−1, 9.2% larger than the best value (–33.04 J g−1) in the original training dataset within another four experiments. Additionally, the alloy represents high austenite finish temperature (481.71°C) and relatively small hysteresis. This promotes the latent heat TES application of SMAs in high temperature circumstance. It is expected that the noise‐aware approach can be convenient for the accelerated materials design via the data‐driven method with noisy data.

show abstract

Effect of Ti/Ni and Hf/Zr ratio on the martensitic transformation behavior and shape memory effect of TiNiHfZr alloys

Cited by 15 publications

References 45 publications

Development of Ni–Ti–Zr–Hf–(Nb, Ta) Multi-Principal Element High-Temperature Shape Memory Alloys with High Cold Workability

Development of Ni–Ti–Zr–Hf–(Nb, Ta) Multi-Principal Element High-Temperature Shape Memory Alloys with High Cold Workability

Molecular Dynamics Simulations of PtTi High-Temperature Shape Memory Alloys Based on a Modified Embedded-Atom Method Interatomic Potential

Noise‐Aware Active Learning to Develop High‐Temperature Shape Memory Alloys with Large Latent Heat

Contact Info

Product

Resources

About