Nanocomposite NiTi shape memory alloy with high strength and fatigue resistance

P Hua, M Xia, Y Onuki, Q Sun - Nature Nanotechnology, 2021 - nature.com
Many established, but also potential future applications of NiTi-based shape memory alloys
(SMA) in biomedical devices and solid-state refrigeration require long fatigue life with 107 …

Design and development of Ti–Ni, Ni–Mn–Ga and Cu–Al–Ni-based alloys with high and low temperature shape memory effects

V Pushin, N Kuranova, E Marchenkova, A Pushin - Materials, 2019 - mdpi.com
In recent years, multicomponent alloys with shape memory effects (SMEs), based on the
ordered intermetallic compounds B2–TiNi, L21–Ni2MnGa, B2–and D03–Cu–Me (Me= Al, Ni …

Solid-state refrigeration of shape memory alloy-based elastocaloric materials: A review focusing on preparation methods, properties and development

S Wang, Y Shi, Y Li, H Lin, K Fan, X Teng - Renewable and Sustainable …, 2023 - Elsevier
Sustainable development represents a vital global strategic goal. In the field of microcooling,
green and environmentally friendly solid-state refrigeration technologies show great …

Shear-induced amorphization in nanocrystalline NiTi micropillars under large plastic deformation

P Hua, B Wang, C Yu, Y Han, Q Sun - Acta Materialia, 2022 - Elsevier
Shear-induced amorphization is a phenomenon observed in polycrystalline NiTi shape
memory alloys under severe plastic deformation, but the underlying mechanism of such a …

Stress-induced nanoscale phase transition in superelastic NiTi by in situ X-ray diffraction

A Ahadi, Q Sun - Acta Materialia, 2015 - Elsevier
In situ X-ray diffraction during loading and unloading is used to investigate the effects of
grain size (GS) on the stress-induced nanoscale phase transition (PT) mechanism in …

Effects of grain size on the rate-dependent thermomechanical responses of nanostructured superelastic NiTi

A Ahadi, Q Sun - Acta Materialia, 2014 - Elsevier
We investigated the effects of grain size on the rate-dependent thermomechanical
responses of polycrystalline superelastic NiTi (with an average grain size from 10 to 90 nm) …

Stress hysteresis and temperature dependence of phase transition stress in nanostructured NiTi—effects of grain size

A Ahadi, Q Sun - Applied Physics Letters, 2013 - pubs.aip.org
Stress hysteresis (⁠ H⁠) and temperature dependence of phase transition stress (d σ/d T)
are the two signatures of first-order phase transition in shape memory alloys. We studied the …

Ultrahigh cycle fatigue of nanocrystalline NiTi tubes for elastocaloric cooling

D Liang, Q Wang, K Chu, J Chen, P Hua, F Ren… - Applied Materials …, 2022 - Elsevier
Elastocaloric cooling using superelastic NiTi shape memory alloy with reversible phase
transformation is a promising environmentally friendly technology, but the limited fatigue life …

TEM study of structural and microstructural characteristics of a precipitate phase in Ni-rich Ni–Ti–Hf and Ni–Ti–Zr shape memory alloys

R Santamarta, R Arróyave, J Pons, A Evirgen… - Acta Materialia, 2013 - Elsevier
The precipitates formed after suitable thermal treatments in seven Ni-rich Ni–Ti–Hf and Ni–Ti–
Zr high-temperature shape memory alloys have been investigated by conventional and high …

Strain states and unique properties in cold-rolled TiNi shape memory alloys

Q Liang, S Zhao, C Liang, T Zhao, D Wang, X Ding… - Acta Materialia, 2022 - Elsevier
Martensitic transformation (MT), strain glass transition (SGT) and the corresponding stress-
strain responses in cold-rolled Ti 49.2 Ni 50.8 shape memory alloys (SMAs) at various …