| METALS AND METAL MATRIX COMPOSITES |
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| Effect of Hf Content on the Microstructure and Superelasticity of Ti49-XNi44Cu6Y1HfX Shape Memory Alloys |
| ZHAO Guangwei1,2,*, LI Da2, CHEN Jian2, FAND Dong1,2, HUANG Caihua1,2, SHI Zengmin2, YE Yongsheng1,2
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1 Hubei Engineering Research Center for Graphite Additive Manufacturing Technology and Equipment, China Three Gorges University, Yichang 443002, Hubei, China
2 College of Mechanical and Power Engineering, China Three Gorges University, Yichang 443002, Hubei, China |
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Abstract Ti-Ni-Cu based shape memory alloy has excellent properties such as small phase transformation hysteresis, large recoverable strain and good thermal stability. The purpose of this work is to systematically investigate the effect of substituting Hf for Ti on the microstructure, phase transformation and superelasticity of Ti49-XNi44Cu6Y1HfX (X=0, 2, 6, 10) alloys. The results show that the main microstructure of the alloy at room temperature is B2 austenite and a small amount of compound phase. And one-step martensitic transformation of B2$\rightleftharpoons$B19' occurs during the loading and unloading processes. With the increase of Hf content, the martensitic transformation temperature decreases, the compressive strength and fracture strain of the alloy decrease, and the critical stress of stress-induced martensite increases. In the cycle compression tests with an increased compressive strain of 3%—11%, the alloy exhibits work hardening phenomenon, and the recoverable stress increases with the increase of prestress. The sample of 10%Hf has the largest recoverable strain of 7.9% when the compressive strain is 11%, and the superelasti-city strain is 5.2%.In the cycle compression tests with a constant compressive strain of 7%, the sample of 10%Hf has good cyclic stability and can be completely recovered.
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Published: 10 May 2023
Online: 2023-05-04
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| Fund:National Natural Science Foundation Youth Fund of China (51604162), Scientific Research Project of Hubei Provincial Department of Education (B2020024), and the Opening Fund of Hubei Engineering Research Center for Graphite Additive Manufacturing Technology and Equipment (HRCGAM202104). |
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1 Tong Y X, Shuitcev A, Zheng Y F. Advanced Engineering Materials, 2020, 22, 1900496.
2 Hao Y S, Ji Y C, Zhang Z, et al. Scripta Materialia, 2019, 168, 71.
3 Gargarella P, Pauly S, Song K K, et al. Acta Materialia, 2013, 61, 151.
4 Nam T H, Saburi T, Shimizu K. Materials Transactions, 1990, 31, 959.
5 Li J, Yi X Y, Sun K S, et al. Journal of Alloys and Compounds, 2018, 747, 348.
6 Yamamoto M, Kuroda T, Yoneyama T, et al. Journal of Materials Science, 2002, 13, 855.
7 Terayama A, Kyogoku H. Materials Science and Engineering:A, 2010, 527, 5484.
8 Sun K S, Yi X Y, Sun B, et al. Journal of Alloys and Compounds, 2019, 772, 603.
9 Meng X L, Li H, Cai W, et al. Scripta Materialia, 2015, 103, 30.
10 Yi X Y, Wang H Z, Gao W H, et al. Journal of Alloys and Compounds, 2019, 802, 181.
11 Tong Y X, Gu H L, James R D, et al. Journal of Alloys and Compounds, 2019, 782, 343.
12 Wang G C, Hu K P, Tong Y X, et al. Intermetallics, 2016, 72, 30.
13 Nespoli A, Villa E, Passaretti F. Journal of Alloys and Compounds, 2019, 779, 30.
14 Zhao G W, Chen J, Ding C. Vacuum, 2020, 177, 109381
15 Cho G B, Kim T Y, Yu C A, et al. Journal of Alloys and Compounds, 2008, 449, 129.
16 Zhao G W, Chen J, Fang D, et al. Journal of Materials Engineering and Performance, 2020, 30, 617.
17 Wang Q Y, Zheng Y F, Liu Y, et al. Materials Letters, 2011, 65, 74.
18 Jang J Y, Chun S J, Choi E, et al. Materials Research Bulletin, 2012, 47, 2939.
19 Chen H, Xiao F, Liang X, et al. Acta Materialia, 2018, 158, 330.
20 Yi X Y, Gao W H, Meng X L, et al. Journal of Alloys and Compounds, 2017, 705, 98.
21 Yi X Y, Meng X L, Cai W, et al. Scripta Materialia, 2018, 153, 90.
22 Li S H, Study on martensitic transformation and functional behavior of Ti-Zr-Hf-Ni-Cu(Co) high-entropy shape memory alloys. Ph. D. Thesis, University of Science and Technology Beijing, China, 2021 (in Chinese).
李少辉. Ti-Zr-Hf-Ni-Cu(Co)高熵形状记忆合金马氏体相变及功能行为研究. 博士学位论文, 北京科技大学, 2021.
23 Hua P, Chu K J, Ren F Z, Sun Q P. Acta Materialia, 2020, 185, 507. |
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2023, Vol. 37 
