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@ARTICLE{Geng:612267,
author = {Geng, Jiayi and Shi, Yunzhu and Barriobero-Vila, Pere and
Jiao, Meiyuan and Cao, Yihuan and Tang, Yu and He, Jingzhi
and Ma, Chao and Ma, Yan and Lei, Zhifeng and Lu, Zhaoping},
title = {{U}ltrastrong and ductile {N}i{T}i-based composite with
large recoverable strain mediated by a compositionally
complex phase},
journal = {Applied materials today},
volume = {39},
issn = {2352-9407},
address = {Amsterdam [u.a.]},
publisher = {Elsevier},
reportid = {PUBDB-2024-05254},
pages = {102347},
year = {2024},
abstract = {NiTi-based composites possess great potential for
concurrently improving both mechanical and functional
properties. However, relying on traditional alloy design
principles limits the design space and greatly hinders the
advancement of high-performance NiTi-based composites. The
concept of high-entropy alloys has expanded the
compositional landscape, unveiling unique structural
characteristics for alloy design and providing new prospects
for addressing these limitations. Here, we report a
compositionally complex NiTi-based composite that exhibits
exceptional strength and ductility, along with remarkable
recoverable strain. The composite,
Ni$_{40}$Ti$_{40}$(NbMoTaW)$_{20}$ (at.\%), comprises a 78.0
\% B2 NiTi matrix, a 19.2 \% Nb-Mo-Ta-W-Ti-Ni
compositionally complex body-centered cubic (BCC) phase, and
a small amount of Ti2Ni. Notably, this composite
demonstrates an engineering compressive strength of 3274
MPa, with a compressive fracture strain of 44.2 \% and a
maximum recoverable strain of 7.3 \% (5.6 \% elastic strain
and 1.7 \% inelastic recoverable strain). These outstanding
mechanical properties result from the unique structural
characteristics of the compositionally complex phase and the
lattice strain matching induced by phase transitions. The
substantial recoverable strain was obtained through the
reversible B2⇌R⇌B19′ phase transition. This work not
only innovates a new category of high-performance NiTi-based
composites but also extends the applicability of the
high-entropy concept.},
cin = {DOOR ; HAS-User / Hereon},
cid = {I:(DE-H253)HAS-User-20120731 / I:(DE-H253)Hereon-20210428},
pnm = {6G3 - PETRA III (DESY) (POF4-6G3) / FS-Proposal: I-20221372
EC (I-20221372-EC)},
pid = {G:(DE-HGF)POF4-6G3 / G:(DE-H253)I-20221372-EC},
experiment = {EXP:(DE-H253)P-P07-20150101},
typ = {PUB:(DE-HGF)16},
UT = {WOS:001279394200001},
doi = {10.1016/j.apmt.2024.102347},
url = {https://bib-pubdb1.desy.de/record/612267},
}