Introduction

Haberland, Christoph; Kadkhodaei, Mahmoud; Elahinia, Mohammad

doi:10.1002/9781118426913.ch1

Cited by 3 publications

(1 citation statement)

References 77 publications

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“…When considering the production of NiTi alloys, casting processes, vacuum induction melting, vacuum arc remelting, electron beam melting, plasma arc melting, and electron beam melting are the most commonly used processes [10].Although expensive from the point of view of commercial application, NiTi alloys are the most important SMAs that have excellent mechanical properties (high ductility and low modulus of elasticity) and physical properties (wear resistance and biocompatibility). Their commercial application in different industries depends primarily on specific thermo-mechanical characteristics, such as shape memory effect, super-elasticity (mechanically induced), and one-way and two-way memory shape effect (thermally induced) [11,12].…”

Section: Introductionmentioning

confidence: 99%

Corrosion of NiTiDiscs in Different Seawater Environments

et al. 2022

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This paper gives an approach to the corrosion resistance analysis and changes in the chemical composition of anNiTi alloy in the shape of a disc, depending on different real seawater environments. The NiTi discs were analysed after 6 months of exposure in real seawater environments: the atmosphere, a tidal zone, and seawater. The corrosion tests showed that the highest corrosion rate for the discs is in seawater because this had the highest value of current density, and the initial disc had the most negative potential. Measuring the chemical composition of the discs using inductively coupled plasma and X-ray fluorescence before the experiment and semiquantitative analysis after the experiment showed the chemical composition after 6 months of exposure. Furthermore, the applied principal component analysis and cluster analysis revealed the influence of the different environments on the changes in the chemical composition of the discs. Cluster analysis detected small differences between the similar corrosive influences of the analysed types of environments during the period of exposure. The obtained results confirm that PCA can detect subtle quantitative differences among the corrosive influences of the types of marine environments, although the examined corrosive influences are quite similar. The applied chemometric methods (CA and PCA) are, therefore, sensitive enough to register the existence of slight differences among corrosive environmental influences on the analysed NiTi SMA.

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Section: Introductionmentioning

confidence: 99%

Corrosion of NiTiDiscs in Different Seawater Environments

et al. 2022

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Thermal-sensing actuator based on conductive polymer ionogel for autonomous human-machine interaction

Hu,

Zhang,

et al. 2024

Sensors and Actuators B: Chemical

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Study of the effect of cooling/heating rate on the thermal properties of ni-ti alloy (SMA) after annealing at different parameters

Kuś

2024

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The research focused on evaluating the effect of different scanning calorimetric (DSC) rates of the cooling/heating process on changes in the phase transformation parameters of Ni-Ti shape memory alloy (SMA) after its prior annealing at different temperatures. The material used in the study was a spring SMA actuator, from which samples were taken for DSC testing. Initial study included the identification of the chemical composition of the material. All phase transformation temperatures were estimated from DSC curves using the tangent intersection method, as a commonly accepted way. Following annealing at various selected temperatures, changes in the shapes of the calorimetric profiles recorded during heating and cooling of the material were obtained. It is therefore clear that annealing promotes modification of the SMA microstructure. It was shown that, in general, there is an influence of the cooling/heating rate performed in the DSC on the evaluated thermal characteristics of the tested material. This influence is perhaps not so pronounced if one takes the states of the material after annealing conducted at different temperatures. With regard to the individual anneals, some of the characteristic transformation temperatures were sensitive to changes in cooling/heating rates, while in others this effect was not likely to be observed.

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Introduction

Cited by 3 publications

References 77 publications

Corrosion of NiTiDiscs in Different Seawater Environments

Corrosion of NiTiDiscs in Different Seawater Environments

Thermal-sensing actuator based on conductive polymer ionogel for autonomous human-machine interaction

Study of the effect of cooling/heating rate on the thermal properties of ni-ti alloy (SMA) after annealing at different parameters

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