Journal ArticleDOI
Transmission electron microscopy investigation of dislocation slip during superelastic cycling of Ni-Ti wires
TLDR
In this article, the role of dislocation slip in superelastic deformation of thin Ni-Ti wires containing various nanograined microstructures was investigated by tensile cyclic loading with in situ evaluation of electric resistivity.About:
This article is published in International Journal of Plasticity.The article was published on 2011-02-01. It has received 282 citations till now. The article focuses on the topics: Slip (materials science) & Deformation mechanism.read more
Citations
More filters
Journal ArticleDOI
On the effect of alloy composition on martensite start temperatures and latent heats in Ni–Ti-based shape memory alloys
TL;DR: In this paper, the concentration dependence of the martensite start temperature (M S ) in Ni-Ti-based shape memory alloys (SMAs) was investigated and it was shown that the strong dependence of M S on alloy composition in binary, ternary and quaternary SMAs is due to a stabilization of the B2 phase by structural relaxations around Ni antisite atoms.
Journal ArticleDOI
Effects of grain size on the rate-dependent thermomechanical responses of nanostructured superelastic NiTi
TL;DR: In this paper, the effects of grain size on the rate-dependent thermomechanical responses of polycrystalline superelastic NiTi (with an average grain size from 10 to 90nm) under both monotonic and cyclic tensile loading-unloading were investigated.
Journal ArticleDOI
Stress-induced nanoscale phase transition in superelastic NiTi by in situ X-ray diffraction
TL;DR: In situ X-ray diffraction during loading and unloading is used to investigate the effects of grain size on the stress-induced nanoscale phase transition (PT) mechanism in polycrystalline superelastic NiTi as mentioned in this paper.
Journal ArticleDOI
Instability of cyclic superelastic deformation of NiTi investigated by synchrotron X-ray diffraction
TL;DR: In this paper, the instability of cyclic tensile superelastic behavior of NiTi polycrystal is investigated by high-resolution in situ synchrotron X-ray diffraction method, and it is found that cyclic instability is due to the gradual redistribution of internal stresses originating from the accumulation of incremental plastic strains accompanying the stress induced martensitic transformation in constrained polycrystalline environment.
Journal ArticleDOI
Fatigue of Nitinol: The state-of-the-art and ongoing challenges.
TL;DR: A review of the present state of the art on the fatigue behavior of superelastic Nitinol is presented and several conclusions are made and recommendations for future works are offered.
References
More filters
Journal ArticleDOI
Softening of nanocrystalline metals at very small grain sizes
TL;DR: In this paper, the deformation of nanocrystalline copper has been studied and it is shown that the hardness and yield stress of the material typically increase with decreasing grain size, a phenomenon known as the reverse Hall-Petch effect.
Journal ArticleDOI
An overview of nitinol medical applications
T M Duerig,A.R. Pelton,D Stockel +2 more
TL;DR: In this article, the authors present 10 less-obvious, but very important, reasons for nitinol's success, both past and future, including the quickly growing and technologically demanding stent applications.
Journal ArticleDOI
Thermomechanical aspects of NiTi
John A. Shaw,Stelios Kyriakides +1 more
TL;DR: In this article, the uniaxial behavior of a nearly equiatomic NiTi alloy is studied experimentally in a temperature and deformation regime in which the alloy exhibits the shape memory effect and pseudoelasticity.
Journal ArticleDOI
Non-medical applications of shape memory alloys
TL;DR: In this article, the authors stress the need for further exploration of the 4P-relation: principles-properties-processing-products as well as in companies as well in universities or other research laboratories, illustrated by describing some actual applications indicating why they are successful, other applications why they failed and still others that can only be realised if some further, probably possible, material improvement can be realised.
Journal ArticleDOI
Medical shape memory alloy applications—the market and its products
TL;DR: In this paper, the shape memory effect holds so many opportunities for medical devices and a selection of current applications is reviewed in detail, considering the benefits of shape memory alloys in medical devices, and considering the factors that impinge on the associated risk analysis of using nitinol in medical applications.