Pre-strain and mean strain effects on the fatigue behavior of superelastic nitinol medical devices

AR Pelton, BT Berg, P Saffari, AP Stebner… - Shape Memory and …, 2022 - Springer
There is a growing body of evidence that “in situ” modification of the microstructure of Nitinol
due to pre-strain and mean strain strongly influence the fatigue properties of implanted …

Compressive mechanical properties and shape memory effect of NiTi gradient lattice structures fabricated by laser powder bed fusion

W Chen, D Gu, J Yang, Q Yang, J Chen… - International Journal of …, 2022 - iopscience.iop.org
Laser additive manufacturing (AM) of lattice structures with light weight, excellent impact
resistance, and energy absorption performance is receiving considerable attention in …

[HTML][HTML] Processing and scalability of NiTiHf high-temperature shape memory alloys

O Benafan, GS Bigelow, A Garg, RD Noebe… - Shape Memory and …, 2021 - Springer
Abstract Development of melting and processing techniques for NiTiHf high-temperature
shape memory alloys at the laboratory scale has resulted in pronounced success and …

3D-printed attachable kinetic shading device with alternate actuation: Use of shape-memory alloy (SMA) for climate-adaptive responsive architecture

H Yi, D Kim, Y Kim, D Kim, J Koh, MJ Kim - Automation in Construction, 2020 - Elsevier
To find a low-cost and flexibly adaptive building design and construction method in the field
of sustainable architecture, the authors attempted to propose a user-fabricable 3D-printed …

Tension-Compression asymmetry of single-crystalline and nanocrystalline NiTi shape memory alloy: An atomic scale study

X Chen, W Chen, Y Ma, Y Zhao, C Deng, X Peng… - Mechanics of …, 2020 - Elsevier
In this study, the tension-compression asymmetry of single-crystalline and nanocrystalline
NiTi shape memory alloys (SMAs) was investigated by molecular dynamics (MD) …

An intermetallic NiTi-based shape memory coil spring for actuator technologies

G Shimoga, TH Kim, SY Kim - Metals, 2021 - mdpi.com
Amongst various intermetallic shape memory alloys (SMAs), nickel–titanium-based SMAs
(NiTi) are known for their unique elastocaloric property. This widely used shape …

Anisotropy and Clausius-Clapeyron relation for forward and reverse stress-induced martensitic transformations in polycrystalline NiTi thin walled tubes

END Grassi, G Chagnon, HMR de Oliveira… - Mechanics of Materials, 2020 - Elsevier
Abstract Inside the Clausius-Clapeyron regime, transformation stresses during superelastic
tensile tests of polycrystalline shape memory alloys are linearly dependent on temperature …

Influence of H-phase precipitation on the microstructure and functional and mechanical properties in a Ni-rich NiTiZr shape memory alloy

SM Kornegay, M Kapoor, BC Hornbuckle… - Materials Science and …, 2021 - Elsevier
The relationship between precipitate evolution, martensitic transformation temperatures,
hardness, and functional load-bias behavior has been analyzed for a Ni 50.8 Ti 34.2 Zr 15 …

3D in-situ characterization of dislocation density in nickel-titanium shape memory alloys using high-energy diffraction microscopy

W Li, S Lee, T Zhang, Y Jin, D Pagan, L Casalena… - Acta Materialia, 2024 - Elsevier
Functional fatigue—changes to the material response during cyclic loading—is a major
barrier to the cycle lifetime demands of shape memory alloy technologies. Functional fatigue …

Bi-modulus materials consistent with a stored energy function: Theory and numerical implementation

M Latorre, FJ Montáns - Computers & Structures, 2020 - Elsevier
Many materials present different behavior in tension and compression. Within the
infinitesimal isotropic theory, the widely used approach based on the Ambartsumyan theory …