Realization of Large Low-Stress Elastocaloric Effect in TiZrNbAl Alloy

Realization of Large Low-Stress Elastocaloric Effect in TiZrNbAl Alloy Bang-He Lv Key Laboratory for Anisotropy and Texture of Materials (Ministry of Education), School of Material Science and Engineering, Northeastern University, Shenyang 110819, China Hua-You Xiang Key Laboratory for Anisotropy and Texture of Materials (Ministry of Education), School of Material Science and Engineering, Northeastern University, Shenyang 110819, China Shang Gao Key Laboratory for Anisotropy and Texture of Materials (Ministry of Education), School of Material Science and Engineering, Northeastern University, Shenyang 110819, China Yan-Xin Guo Key Laboratory for Anisotropy and Texture of Materials (Ministry of Education), School of Material Science and Engineering, Northeastern University, Shenyang 110819, China Jin-Han Yang Key Laboratory for Anisotropy and Texture of Materials (Ministry of Education), School of Material Science and Engineering, Northeastern University, Shenyang 110819, China Nai-Fu Zou Institute of Materials Science and Engineering, Shenyang Aerospace University, Shenyang 110136, China Xiaoli Zhao Key Laboratory for Anisotropy and Texture of Materials (Ministry of Education), School of Material Science and Engineering, Northeastern University, Shenyang 110819, China Zongbin Li Key Laboratory for Anisotropy and Texture of Materials (Ministry of Education), School of Material Science and Engineering, Northeastern University, Shenyang 110819, China Bo Yang Key Laboratory for Anisotropy and Texture of Materials (Ministry of Education), School of Material Science and Engineering, Northeastern University, Shenyang 110819, China http://orcid.org/0000-0002-9048-6387 Nan Jia Key Laboratory for Anisotropy and Texture of Materials (Ministry of Education), School of Material Science and Engineering, Northeastern University, Shenyang 110819, China Hai-Le Yan Key Laboratory for Anisotropy and Texture of Materials (Ministry of Education), School of Material Science and Engineering, Northeastern University, Shenyang 110819, China http://orcid.org/0000-0003-2184-132X Liang Zuo Key Laboratory for Anisotropy and Texture of Materials (Ministry of Education), School of Material Science and Engineering, Northeastern University, Shenyang 110819, China http://orcid.org/0000-0003-2971-3701

Seeking novel high-performance elastocaloric materials with low critical stress plays a crucial role in advancing the development of elastocaloric refrigeration technology. Here, as a first attempt, the elastocaloric effect of TiZrNbAl shape memory alloy at both room temperature and finite temperatures ranging from 245 K to 405 K, is studied systematically. Composition optimization shows that Ti-19Zr-14Nb-1Al (at.%), possessing excellent room-temperature superelasticity with a critical stress of around 100 MPa and a small stress hysteresis of around 70 MPa and outstanding fracture resistance with a compressive strain of 20% and stress of 1.7 GPa, demonstrates a substantial advantage as an elastocaloric refrigerant. At room temperature, a large adiabatic temperature change (ΔTad) of −6.7 K is detected, which is comparable to the highest value reported in the Ti-based alloys. A high elastocaloric cyclic stability, with almost no degradation of ΔTad after 4000 cycles, is observed. Furthermore, the sizeable elastocaloric effect can be steadily expanded from 255 K to 395 K with a temperature window of as large as 140 K. A maximum ΔTad of −7.9 K appears at 355 K. The present work demonstrates a promising potential of TiZrNbAl as a low critical stress and low hysteresis elastocaloric refrigerant.
02 14 2024 885 ma17040885 National Key R&D Program of China http://dx.doi.org/10.13039/501100012166 2021YFA1200203 National Training Program of Innovation and Entrepreneurship for Undergraduates http://dx.doi.org/10.13039/ 202310145095 2023JH2/101600063 National Natural Science Foundation of China http://dx.doi.org/10.13039/501100001809 52001218, 52071068 https://creativecommons.org/licenses/by/4.0/ 10.3390/ma17040885 https://www.mdpi.com/1996-1944/17/4/885 https://www.mdpi.com/1996-1944/17/4/885/pdf