A Ti-Zr-Hf-Ni-Nb high-entropy shape memory alloy with an exceptional strength-ductility synergy for high-temperature application
A novel Ti35.16Zr5.86Hf5.86Ni46.87Nb6.25 (at. %) high-entropy shape memory alloy (HESMA) is developed for applications in high-stress, high-temperature environments. This alloy consists of B19’ martensitic laths with minor β-Nb and Ti2Ni particles along grain boundaries. It demonstrates an exceptional strength-ductility synergy, a relatively-high martensitic transformation start temperature (Ms = 392 K), and outstanding shape memory property with maximum recoverable strain (ϵmre = 1.94%) under 550 MPa. This combination of characteristics successfully overcomes the traditional trade-off among Ms, strength-ductility, and shape memory effect. Moreover, the thermal-induced transformation behavior is systematically investigated. This work establishes a paradigm for developing high-performance high-temperature HESMAs.
Authors
- Yinyang Wang (ORCID: https://orcid.org/0000-0001-7268-2539)
- Tongming Wang (ORCID: https://orcid.org/0000-0003-2012-5751)
- Zhenhua Wang (ORCID: https://orcid.org/0000-0002-4233-7803)
- Haiyang Liu (ORCID: https://orcid.org/0000-0003-2139-7695)
- Rui Wang (ORCID: https://orcid.org/0000-0002-1864-3173)
- Qing Wang (ORCID: https://orcid.org/0000-0001-7228-6472)
- Xiaona Li (ORCID: https://orcid.org/0000-0003-0891-8070)
- Peter K. Liaw
Institutions
- Dalian University of Technology (CN)
- Ningbo Academy of Agricultural Sciences (CN)
- University of Tennessee at Knoxville (US)
Publication Details
- Journal
- Materials Research Letters
- Published
- 2025-10-29
- DOI
- https://doi.org/10.1080/21663831.2025.2580434
- Citations
- 2
- Primary Topic
- Shape Memory Alloy Transformations
- Type
- article
- Field-Weighted Citation Impact
- 1.04