Over 10 K elastocaloric effect in ω-phase-free TiZrNbSn alloy
Ti-based shape memory alloys are promising for elastocaloric cooling but typically fail to meet the practical 10 K adiabatic temperature change (ΔTad) threshold. Here, we propose a microstructural design to eliminate the ω phase that suppresses martensitic transformation, thereby enhancing ΔTad. The designed ω-phase-free Ti69Zr17Nb11Sn3 alloy exhibits remarkable ΔTad of 11.6 K (Pt sensor) and 18.52 K (IR camera), and is the first Ti-based alloy to exceed 10 K. Combined with low critical stress (σcr), an ultrahigh specific adiabatic temperature change (ΔTad/σcr) is achieved. This work presents a novel and effective approach for improving the elastocaloric performance of Ti-based alloys.
Authors
- Liang Zuo (ORCID: https://orcid.org/0000-0003-2971-3701)
- Haile Yan (ORCID: https://orcid.org/0000-0003-2184-132X)
- Bo Yang (ORCID: https://orcid.org/0000-0002-9048-6387)
- Zongbin Li (ORCID: https://orcid.org/0000-0003-2901-6156)
- Xiaoli Zhao (ORCID: https://orcid.org/0000-0003-1565-8991)
- Na Xiao (ORCID: https://orcid.org/0000-0003-2376-4073)
- Hua-You Xiang
- Minghui Cai (ORCID: https://orcid.org/0000-0002-1256-5872)
- Dong Wang
Institutions
- Zhijiang College of Zhejiang University of Technology
- Zhejiang University of Technology (CN)
- Universidad del Noreste (MX)
- Northeastern University (CN)
Publication Details
- Journal
- Materials Research Letters
- Published
- 2025-09-15
- DOI
- https://doi.org/10.1080/21663831.2025.2556710
- Citations
- 3
- Primary Topic
- Titanium Alloys Microstructure and Properties
- Type
- article
- Field-Weighted Citation Impact
- 1.55