Improved mechanical properties of porous nitinol by aluminum alloying

Monogenov, A. N.; Марченко, Екатерина; Baygonakova, Gulsharat A.; Yasenchuk, Yu. F.; Garin, A. S.; Volinsky, Alex A.

doi:10.1016/j.jallcom.2022.165617

Cited by 13 publications

(5 citation statements)

References 36 publications

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“…For example, the presence of percolating voids and a significant specific surface area typical of porous materials provide their lower density, lower thermal conductivity and high catalytic activity compared to non-porous analogues [6]. The potential functional applicability of porous materials is largely determined by their mechanical properties M [7][8][9][10][11]. Here, the quantity M denotes a set of properties such as the Young's modulus E, the yield stress σ y , the shear modulus K s , the bulk modulus G b , etc., i.e., M = {E, σ y , K s , G b , .…”

Section: Introductionmentioning

confidence: 99%

A Unified Empirical Equation for Determining the Mechanical Properties of Porous NiTi Alloy: From Nanoporosity to Microporosity

Galimzyanov,

Nikiforov,

Anikeev

et al. 2023

Crystals

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The mechanical characteristics of a monolithic (non-porous) crystalline or amorphous material are described by a well-defined set of quantities. It is possible to change the mechanical properties by introducing porosity into this material; as a rule, the strength values decrease with the introduction of porosity. Thus, porosity can be considered an additional degree of freedom that can be used to influence the hardness, strength and plasticity of the material. In the present work, using porous crystalline NiTi as an example, it is shown that the mechanical characteristics such as the Young’s modulus, the yield strength, the ultimate tensile strength, etc., demonstrate a pronounced dependence on the average linear size l¯ of the pores. For the first time, an empirical equation is proposed that correctly reproduces the dependence of the mechanical characteristics on the porosity ϕ and on the average linear size l¯ of the pores in a wide range of sizes: from nano-sized pores to pores of a few hundred microns in size. This equation correctly takes into account the limit case corresponding to the monolithic material. The obtained results can be used directly to solve applied problems associated with the design of materials with the necessary combination of physical and mechanical characteristics, in particular, porous metallic biomaterials.

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Section: Introductionmentioning

confidence: 99%

A Unified Empirical Equation for Determining the Mechanical Properties of Porous NiTi Alloy: From Nanoporosity to Microporosity

Galimzyanov,

Nikiforov,

Anikeev

et al. 2023

Crystals

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“…In the last decade, significant efforts have been made to modify the chemical composition of NiTi-based alloys (by ternary and quaternary substitution of Ni and/or Ti) to increase the transformation temperature [ 6 ], control hysteresis [ 7 ], and/or improve mechanical properties such as strength and corrosion resistance [ 8 ]. Much attention is paid to the question of what position of the titanium or nickel atoms will be occupied by one or another alloying element; however, there is not enough clarity in this issue [ 9 , 10 , 11 ].…”

Section: Introductionmentioning

confidence: 99%

Phase Composition, Microstructure, Multiple Shape Memory Effect of TiNi50−xVx (x = 1; 2; 4 at.%) System Alloys

et al. 2022

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The phase composition, microstructure, and multiple shape memory effect of TiNi50−xVx alloys were studied in this work. The phase composition of the TiNi50−xVx system is the TiNi matrix, spherical particles of TiNiV, the secondary phase Ti2Ni(V). Doping of TiNi alloys with vanadium atoms leads to an increase in the stability of high-temperature B2 and rhombohedral R-phases. An increase in the atomic volume with an increase in the concentration of the alloying element V from 1 to 4 at.% was established. Vanadium doping of the Ti–Ni–V system alloys leads to an increase in the temperature interval for the manifestation of the multiple shape memory effect. It has been established that the value of the reversible deformation of the multiple shape memory effect both during heating and during cooling increases linearly from 2 to 4% with an increase in the vanadium concentration.

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“…A unique combination of the shape memory effect and superelasticity along with such technological and mechanical properties as strength and ductility, corrosion resistance, biocompatibility, allows using the alloys in medicine. The introduction of various alloying elements into the composition of titanium nickelide forms various structural and phase states and, as a result, influences efficiently the physical and mechanical characteristics, determined by these elements [3][4][5]. Titanium nickelide alloys with a porous structure are filled satisfactorily with tissue cells and biological fluids, which is promising when creating materials intended for osteoplasty [6,7].…”

Section: Introductionmentioning

confidence: 99%

Influence of silver nanoparticles on the structure and mechanical properties of porous titanium nickelide alloys

Marchenko¹,

Baigonakova²,

Larikov³

et al. 2022

nfm

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The aim of the work is to study the effect of silver doping on the structure and mechanical properties of porous titanium nickelide alloys obtained by self-propagating high-temperature synthesis (SHS). The structure of the samples was studied using X-ray diffraction analysis, scanning and transmission electron microscopy. The mechanical properties of X X porous alloys were studied in compression tests. An increase in the volume fraction of the B19' martensitic phase, intermetallic compounds based on the Ti 2 Ni and a decrease in the volume fraction of austenite with the B2 structure with an increase in the silver content were established. An increase in the plasticity of porous titanium nickelide alloys with an increase in the concentration of silver in the composition while maintaining the ultimate strength was revealed.

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Improved mechanical properties of porous nitinol by aluminum alloying

Cited by 13 publications

References 36 publications

A Unified Empirical Equation for Determining the Mechanical Properties of Porous NiTi Alloy: From Nanoporosity to Microporosity

A Unified Empirical Equation for Determining the Mechanical Properties of Porous NiTi Alloy: From Nanoporosity to Microporosity

Phase Composition, Microstructure, Multiple Shape Memory Effect of TiNi50−xVx (x = 1; 2; 4 at.%) System Alloys

Influence of silver nanoparticles on the structure and mechanical properties of porous titanium nickelide alloys

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