Progress in phase field modeling of functional properties and fracture behavior of shape memory alloys

B Xu, C Yu, J **ong, J Hu, Q Kan, C Wang… - Progress in Materials …, 2024‏ - Elsevier
Shape memory alloys (SMAs) have been widely employed in many engineering fields due
to their unique functional properties, such as super-elasticity, elastocaloric effect, and shape …

Toward tunable mechanical behavior and enhanced elastocaloric effect in NiTi alloy by gradient structure

J Chen, B Liu, L **ng, W Liu, L Lei, G Fang - Acta Materialia, 2022‏ - Elsevier
Tailoring properties of engineering materials to meet various application requirements is a
long-standing challenge in materials science. Here, we demonstrate an unprecedented …

Improved elastocaloric cooling performance in gradient-structured NiTi alloy processed by localized laser surface annealing

J Chen, L **ng, G Fang, L Lei, W Liu - Acta Materialia, 2021‏ - Elsevier
The coefficient of performance of material (COP mat, the ratio of caloric effect to energy
dissipation), a key figure-of-merit for solid-state refrigerants, is significantly degenerated by …

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) …

Phase field study on the microscopic mechanism of grain size dependent cyclic degradation of super-elasticity and shape memory effect in nano-polycrystalline NiTi …

B Xu, C Yu, G Kang - International Journal of Plasticity, 2021‏ - Elsevier
A non-isothermal and crystal plasticity based phase field model was established by
incorporating various inelastic deformation mechanisms, ie, martensite transformation …

From mechanical behavior and elastocaloric effect to microscopic mechanisms of gradient-structured NiTi alloy: A phase-field study

Q Zhang, J Chen, G Fang - International Journal of Plasticity, 2023‏ - Elsevier
The introduction of gradient structure has been recently reported as a practical way to tailor
the mechanical behavior of NiTi alloy while improving its elastocaloric effect simultaneously …

Effects of grain size on tensile fatigue life of nanostructured NiTi shape memory alloy

H Yin, Y He, Z Moumni, Q Sun - International Journal of Fatigue, 2016‏ - Elsevier
The effects of grain size (GS) on tensile fatigue life of nanostructured NiTi superelastic shape
memory alloys (SMAs) with GS= 10 nm, 42 nm and 80 nm are investigated. Macroscopic …

[HTML][HTML] Recent developments in ultrafine shape memory alloys using amorphous precursors

SH Hong, HJ Park, GA Song, KB Kim - Materials, 2023‏ - mdpi.com
In this review, we systematically reviewed the recent advances in the development of
ultrafine shape memory alloys with unique shape memory effects and superelastic behavior …

Temperature dependence of elastocaloric effect in a microstructurally graded NiTi alloy

J Chen, W Wang, Q Zhang, L Lei, U Ramamurty… - Scripta Materialia, 2024‏ - Elsevier
The temperature dependence of elastocaloric cooling properties of a NiTi alloy with a grain
size gradient, which was obtained by cold rolling and subsequent laser surface annealing …