Structure, Microstructure, and Some Selected Mechanical Properties of Ti-Ni Alloys

Cascadan, Daniela; Grandini, Carlos Roberto

doi:10.5772/intechopen.86717

Cited by 3 publications

(1 citation statement)

References 30 publications

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“…4). Titanium is an HCP crystal structure at room temperature and BCC at high temperature that restrict the nickel maximum solubility of 10% at 942 °C [15]. NiTi-based SMA attracts scientists and engineers working with actuators because these alloys can be operated under high stress and strain with unique properties.…”

Section: Niti Shape Memory Alloymentioning

confidence: 99%

A Critical Review on Nickel–Titanium Thin-Film Shape Memory Alloy Fabricated by Magnetron Sputtering and Influence of Process Parameters

Marupalli

Behera

Aich

2021

Trans Indian Inst Met

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This paper discussed the fundamentals of NiTi shape memory alloy and its applications in advanced scientific fields. Currently, the world is focusing on miniaturized systems for various industrial and functional applications. The thin-film shape memory NiTi alloy plays a crucial role in MEMS/NEMS industry in fabrication of microdevices. In this article, the NiTi phase diagram along with the shape memory effect and superelasticity has also been explained. Among several types of fabrication techniques for NiTi thin films, magnetron sputtering, which yields a better homogeneous film, has been discussed. Both the operational parameters (target type, Ar pressure, applied power, target-substrate distance, substrate rotation, substrate temperature, plasma stability, deposition rate) and the material's parameters (deposition pattern, orientation of adatom, film thickness, film stress, crystal structure, grain size, intermetallic formation, oxide formation, phase transformation) have been correlated in this article. The utilization of shape memory behavior in various industrial applications has been discussed here, also the advantages and limitations of SMA have been briefly discussed.

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Section: Niti Shape Memory Alloymentioning

confidence: 99%

A Critical Review on Nickel–Titanium Thin-Film Shape Memory Alloy Fabricated by Magnetron Sputtering and Influence of Process Parameters

Marupalli

Behera

Aich

2021

Trans Indian Inst Met

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Effect of Oxygen in the Structure, Microstructure and Mechanical Properties of Ti-xNi (x = 5, 10, 15 and 20 wt%) Alloys

Cascadan

Grandini

2020

Metals

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Titanium alloys have great potential for use as biomaterials due to good biocompatibility and mechanical properties. The nickel addition to titanium improves the wear, corrosion and mechanical resistance of this element. The objective of this paper was to investigate the effects of oxygen on the structure, microstructure and some selected mechanical properties of this alloy system. The results showed that the samples present the adequate nickel concentration and low concentration of other metals. The alloys exhibit predominantly the α and intermetallic Ti2Ni phases, and the amount of it increases according to the nickel concentration. In the Ti-15Ni and Ti-20Ni alloys, this intermetallic reacted with oxygen forming Ti4Ni2O trioxide. The microstructures varied according to the processing, as well as the microhardness values. Elastic modulus values are slightly above titanium due to the formation of a new intermetallic phase but have not varied significantly with processing and doping with oxygen.

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Nitinol Type Alloys General Characteristics and Applications in Endodontics

Dobrzański

Dobrzański²,

Dobrzańska-Danikiewicz

et al. 2022

Processes

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A very extensive literature review presents the possibilities and needs of using, in endodontics, the alloys commonly known as nitinol. Nitinol, as the most modern group of engineering materials used to develop root canals, is equilibrium nickel and titanium alloys in terms of the elements’ atomic concentration, or very similar. The main audience of this paper is engineers, tool designers and manufacturers, PhD students, and students of materials and manufacturing engineering but this article can also certainly be used by dentists. The paper aims to present a full material science characterization of the structure and properties of nitinol alloys and to discuss all structural phenomena that determine the performance properties of these alloys, including those applied to manufacture the endodontic tools. The paper presents the selection of these alloys’ chemical composition and processing conditions and their importance in the endodontic treatment of teeth. The results of laboratory studies on the analysis of changes during the sterilization of endodontic instruments made of nitinol alloys are also included. The summary of all the literature analyses is an SWOT analysis of strengths, weaknesses, opportunities, and threats, and is a forecast of the development strategy of this material in a specific application such as endodontics.

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Structure, Microstructure, and Some Selected Mechanical Properties of Ti-Ni Alloys

Cited by 3 publications

References 30 publications

A Critical Review on Nickel–Titanium Thin-Film Shape Memory Alloy Fabricated by Magnetron Sputtering and Influence of Process Parameters

A Critical Review on Nickel–Titanium Thin-Film Shape Memory Alloy Fabricated by Magnetron Sputtering and Influence of Process Parameters

Effect of Oxygen in the Structure, Microstructure and Mechanical Properties of Ti-xNi (x = 5, 10, 15 and 20 wt%) Alloys

Nitinol Type Alloys General Characteristics and Applications in Endodontics

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