Improving ductility and functional properties of (TiZrHf)50Ni25Co10Cu15 high entropy shape memory by melt-spinning technique
Journal
Scripta Materialia
Journal Volume
259
Start Page
116557
ISSN
1359-6462
Date Issued
2025-04-01
Author(s)
Abstract
This study utilized the melt-spinning technique to suppress the formation of coarse Ti2Ni-type second phases. The amorphous as-spun ribbon was treated at 1000 °C for 3 min and fully crystallized with B2 matrix and nano-scale Ti2Ni-type second phase. The Ti2Ni-type second phase was evenly dispersed in the B2 matrix, with its diameter limited to below 325 nm. By reducing the size of the Ti2Ni-type second phase from micro-scale to nano-scale, the crystallized ribbon showed excellent ductility under tensile deformation. The ribbon exhibited superelasticity at a wide temperature range between 20 and 200 °C with a maximum recoverable strain of 4 %. Furthermore, the ribbon delivered a promising shape memory effect with a recoverable strain of 5.3 %. The melt-spinning technique conquered the brittleness problem of TiNi-based high entropy shape memory alloys, enabling TiNi-based high entropy shape memory alloys to be designed and applied for versatile applications.
Subjects
Martensitic phase transformation
Rapid-solidification
Shape memory alloys (SMA)
Tension test
Shape memory effect
SDGs
Publisher
Elsevier BV
Type
journal article