Microstructure and elastic modulus of Ti–Nb–Si ternary alloys for biomedical applications

This paper deals with the study of the development, structural and microstructural characterization and, selected mechanical properties of Ti-25Ta-50Zr alloy for biomedical applications. The alloy was melted in an arc furnace and various solution heat treatments were performed to analyze the influence of the temperature and time on the structure, microstructure, microhardness and elastic modulus of the samples. The structural and microstructural results, obtained by X-ray diffraction and microscopy techniques, showed that the solution heat treatment performed at high temperatures induces the formation of the β phase, while solution heat treatment performed at low temperatures induces the formation of the α” and ω metastable phases. Regarding the effect of time, samples subjected to heat treatment for 6 hours have only the β phase, indicating that lengthy treatments suppress the α” phase. Regarding the hardness and elastic modulus, the alloy with the α” and ω phases, after treatment performed at a temperature of 500 °C, has a high hardness value and elastic modulus due to the presence of the ω phase that hardens and weakens alloys. The titanium alloys developed in this study have excellent mechanical properties results for use in the orthopedic area, better than many commercial materials such as cp-Ti, stainless steel and Co-Cr alloys.

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Open Porous α + β Titanium Alloy by Liquid Metal Dealloying for Biomedical Applications

Metals ◽

10.3390/met10111450 ◽

2020 ◽

Vol 10 (11) ◽

pp. 1450 ◽

Cited By ~ 1

Author(s):

Stefan Alexander Berger ◽

Ilya Vladimirovich Okulov

Keyword(s):

Titanium Alloy ◽

Elastic Modulus ◽

Liquid Metal ◽

Yield Strength ◽

Biomedical Applications ◽

High Yield ◽

High Yield Strength ◽

Open Porous Structure ◽

Micrometer Scale ◽

High Deformability

Open porous dendrite-reinforced TiMo alloy was synthesized by liquid metal dealloying of the precursor Ti47.5Mo2.5Cu50 (at.%) alloy in liquid magnesium (Mg). The porous TiMo alloy consists of α-titanium and β-titanium phases and possesses a complex microstructure. The microstructure consists of micrometer scale β-titanium dendrites surrounded by submicrometer scale α-titanium ligaments. Due to the dendrite-reinforced microstructure, the porous TiMo alloy possesses relatively high yield strength value of up to 180 MPa combined with high deformability probed under compression loading. At the same time, the elastic modulus of the porous TiMo alloy (below 10 GPa) is in the range of that found for human bone. This mechanical behavior along with the open porous structure is attractive for biomedical applications and suggests opportunities for using the porous TiMo alloy in implant applications.

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ENGINEERING Ti-35Nb-Sn ALLOYS WITH GRADED ELASTIC MODULUS BY LASER MELTING FOR BIOMEDICAL APPLICATIONS

10.26678/abcm.cobem2019.cob2019-2418 ◽

2019 ◽

Author(s):

Juliane Ribeiro da Cruz Alves ◽

Rodnei Bertazzoli

Keyword(s):

Elastic Modulus ◽

Biomedical Applications ◽

Laser Melting

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Synthesis of hydrolytically stable low elastic modulus polyurethane-urea for biomedical applications

Polymer International ◽

10.1002/(sici)1097-0126(200001)49:1<88::aid-pi298>3.0.co;2-7 ◽

2000 ◽

Vol 49 (1) ◽

pp. 88-92 ◽

Cited By ~ 29

Author(s):

Muthu Jayabalan ◽

P?P Lizymol ◽

Vinoy Thomas

Keyword(s):

Elastic Modulus ◽

Biomedical Applications ◽

Low Elastic Modulus

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Mechanical Property and Microstructure of Ti-Ta-Ag Alloy for Biomedical Applications

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.520.254 ◽

2012 ◽

Vol 520 ◽

pp. 254-259 ◽

Cited By ~ 1

Author(s):

Ming Wen ◽

Cui E Wen ◽

Peter D. Hodgson ◽

Yun Cang Li

Keyword(s):

Mechanical Properties ◽

Mechanical Property ◽

Elastic Modulus ◽

Spark Plasma Sintering ◽

Biomedical Applications ◽

High Hardness ◽

Vacuum Sintering ◽

Preparation Methods ◽

Plasma Sintering ◽

Spark Plasma

Ti and some of its alloys (e.g. Ti–6Al–4V alloy) have become the metals of choice for the endosseous parts of presently available dental implants. In the present study, Ti-Ta-Ag alloys with a different Ag content were prepared using vacuum sintering (VS) and spark plasma sintering (SPS) process. The microstructure and mechanical properties of the Ti-Ta-Ag alloys were investigated. The results show that dense Ti-Ta-Ag alloys prepared using the SPS process exhibit high hardness and a suitable elastic modulus for implant materials for load-bearing applications. The effect of preparation methods on the microstructure of Ti-Ta-Ag alloys is discussed.

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Biomimetic Creation of Surfaces on Porous Titanium for Biomedical Applications

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.896.259 ◽

2014 ◽

Vol 896 ◽

pp. 259-262 ◽

Cited By ~ 2

Author(s):

Kun Mediaswanti ◽

Cui E Wen ◽

Elena P. Ivanova ◽

Francois Malherbe ◽

Christopher C. Berndt ◽

...

Keyword(s):

Elastic Modulus ◽

Titanium Alloys ◽

Biomedical Applications ◽

Healing Process ◽

Porous Titanium ◽

Surrounding Tissue ◽

Calcium Phosphate Coating ◽

Natural Bone ◽

Silica Addition ◽

Dense Titanium

Titanium and titanium alloys have been extensively studied for many applications in the area of bone tissue engineering. However, dense titanium is prone to lead into aseptic loosening due to their high elastic modulus compared to natural bone. One way to lower the elastic modulus is to produce a porous structure of the metallic alloy by adjusting its porosity. Another concern is the bioinertness of titanium that have no direct chemical bonding with surrounding tissue. One approach to improve the healing process is the application of a calcium phosphate coating onto the surface of biomedical devices and implants. Biomimetic creation of surface using alkali heat treatment with silica addition was employed in this study. The porosity of the samples ranges from 60% to 70%. It was demonstrated that the biomimetic methods are suitable for inducing apatite on the titanium alloys surface.

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Mechanical Behaviors of Ti-29Nb-13Ta-4.6Zr-XO for Biomedical Applications Subjected to Cold Working and Various Heat Treatments

Materials Science Forum ◽

10.4028/www.scientific.net/msf.561-565.1471 ◽

2007 ◽

Vol 561-565 ◽

pp. 1471-1476

Author(s):

Mitsuo Niinomi ◽

Toshikazu Akahori ◽

Masaaki Nakai ◽

Hiroshi Ishikawa ◽

Michiharu Ogawa

Keyword(s):

Elastic Modulus ◽

Oxygen Content ◽

Biomedical Applications ◽

Cold Working ◽

Early Stage ◽

Age Hardening ◽

Mechanical Behaviors ◽

Ω Phase ◽

Α Phase ◽

Effect Of Oxygen

The effect of oxygen content on aging behavior and invar characteristics of Ti-29Nb-13Ta-4.6Zr (TNTZ) were investigated. The age hardening of TNTZ aged at 573 K and 723 K is enhanced with the oxygen content. The ω phase precipitates and grows from early stage of aging in TNTZ regardless of the oxygen content when aged at 573 K. The lath-like shape α phase precipitated in TNTZ aged at 723 K increases in size with the oxygen content. The elastic modulus increases with the oxygen content and aging. The ω phase increase the elastic modulus to a greater extent than the increase due to the α phase. The tensile strength increases with the oxygen content and aging, while the elongation decreases. TNTZ with oxygen content of 0.1 mass% exhibits invar-like characteristics through severe cold working. A higher oxygen content suppresses the invar-like characteristics of TNTZ.

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Магнитострикция в сплавах Fe-=SUB=-75-=/SUB=-Ga-=SUB=-25-x-=/SUB=-Z-=SUB=-x-=/SUB=- (Z=Al, Ge, Si): расчет методом магнитного вращающего момента

Физика твердого тела ◽

10.21883/ftt.2021.11.51571.15s ◽

2021 ◽

Vol 63 (11) ◽

pp. 1745

Author(s):

М.В. Матюнина ◽

М.А. Загребин ◽

В.В. Соколовский ◽

В.Д. Бучельников

Keyword(s):

Elastic Modulus ◽

Density Functional ◽

Ternary Alloys ◽

Ab Initio Study ◽

Magnetic Torque ◽

Functional Theory ◽

Cubic Crystal ◽

Lattice Constants ◽

Magnetoelastic Properties ◽

The Density Functional Theory

This work presents an ab initio study of the effect of a small addition of the third element of III and IV groups on the elastic and magnetoelastic properties of Fe75Ga25 alloy. The dependencies of the tetragonal elastic modulus C', magnetoelastic constant –b1, and the tetragonal magnetostrictive constant λ001 on the concentration of the Z-element in the cubic crystal structures A2 and D03 were obtained with the help of the density functional theory and the magnetic torque method in Fe75Ga25-xZx (Z = Al, Ge, Si) alloys (0≤x≤6 at.%). It is shown that the addition of Al and Si atoms leads to an increase in the tetragonal elastic modulus compared to the Fe75Ga25 binary alloy. A correlation was established in the dependence equilibrium lattice constants a0(x) and λ001(x) in the studied ternary alloys for the A2 structure.

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