Effect of Fe-content on the Phases Stability and Properties of New Biomedical Titanium Alloy (original) (raw)
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Development of Low Rigidity β-type Titanium Alloy for Biomedical Applications
MATERIALS TRANSACTIONS, 2002
The low rigidity type titanium alloy, Ti-29Nb-13Ta-4.6Zr was designed, and then the practical level ingot of the alloy was successfully fabricated by Levicast method. The mechanical and biological compatibilities of the alloys were investigated in this study. The following results were obtained. The mechanical performance of tensile properties and fatigue strength of the alloy are equal to or greater than those of conventional biomedical Ti-6Al-4V ELI. Young's modulus of the alloy is much lower than that of Ti-6Al-4V ELI, and increases with the precipitation of α phase or ω phase in the β matrix phase. The compatibility of the alloy with bone of the alloy is excellent. Low rigidity of the alloy is effective to enhance the healing of bone fracture and remodeling of bone. The bioactive coating layer of hydroxyapatite can be formed on the alloy.
The Proceedings of the JSME Materials and Processing Conference (M&P), 2002
Mepariment of1boduchai7 Spstems Ehgt, foyobashi [iniveisily of 7bebnalogx 1'1, Hibarigaaka, tempaku`ehq lbyobasbi 441`858a ehlpan, ahahori@sp-mac4,tmpse.tut.ac.Xp 'tl]eparttnent at'llentaiMlatends thiencq Shitoal afDentista:x Aichi'Gaktmb [iniversity Kbsumoto'ehq Alagppa 464'S65a tJhpan ""Rdi) Labaiata,:vl Daido Steei Cb., Lta llaido'chq Minamiku AeRgoJia 457-8545 eJapan Abstract: Mierostructures of newly developed biomedical TX-29Nb-13Ta`4.6Zr conducted with aging at a temperature between 573 K and 673 K for 259.2 ks after solution treatment at 1063 K for 3.6 ks have super fine m phase or both super fine cr and oo phases in B phase. The balance of strength and ductility is much better for the newly developed alloy conducted with aging at 673 K after solution treatment than those for the newly developed alloy conducted with aging at 573 K or 593K after solution treatment. Plain fatigue limit of the newly developed alloy conducted with solution treatment, and aging at 673 K for 259.2 ks after solution treatment are around 400 MPa and 700 MPa, respectively,
2013
Beta titanium alloys are promising materials for load-bearing orthopaedic implants due to their excellent corrosion resistance and biocompatibility, low elastic modulus and moderate strength. Metastable beta-Ti alloys are hardenable via precipitation of alpha phase; however this has the adverse effect on elastic modulus. Small amounts of Fe (0-2%) and Si (0-1%) were added to Ti-Nb-Zr-Ta biocompatible alloy. SEM observations showed that Si content inhibits the grain growth during beta annealing. Coarse and fine silicide particles were observed using scanning electron microscopy. Fe and Si additions cause an increase in elastic modulus from 65 GPa to 85 GPa, which is still much lower than that of commonly used Ti-6Al-4V alloy. Fe additions and also Si additions cause a significant increase in microhardness. High temperature annealing enhances the positive effect of Si content on microhardness due to higher solubility of Si in beta Ti matrix. Alloy with composition TNTZ+2Fe+0.5Si prove...
IOP Conference Series: Materials Science and Engineering, 2019
The high strength Ti-Al-V alloy is a α+β type that could be extensively used for many special applications like health care instruments owing to their unique combination of better mechanical properties, superior biocorrosion resistance with excellent biocompatibility, and aerospace applications. This high strength titanium alloy system has a combination of α+β stabilizing elements such as aluminium 7.18 wt.%, and vanadium 7.69 wt.% with high nitrogen content. But special purpose of nitrogen content is α stabilizer that acts as solid solution strengthener, enhancement of mechanical properties and increasing the strain (ε) of this alloy. This experimental work has been dealt with the results of influencing the microstructure of as-received titanium alloy by solution treatment at 860oC for 1h followed by immediately quenching into oil (STQoq) and water (STQwq). These solution treated alloys were preferred for ageing at 500oC for 5h then air cooling (STA). The heat treated alloy was exa...
Biocompatibility, corrosion, and wear resistance of β titanium alloys for biomedical applications
Biocompatibility, corrosion, and wear resistance of β titanium alloys for biomedical applications, 2020
A novel β-Ti-xNb-3.5Sn alloys (x = 33, 36, and 39 wt. % Nb) were made using mechanical alloying of elemental powders by cold isostatic pressing. These powders were blended and then milled at different times using a planetary ball mill. The milled powders were compacted and then consolidated at different temperatures. The produced alloys were characterized as a biomedical material; using a scanning electron microscope (SEM), energy dispersive spectroscopy (EDS), X-ray diffraction (XRD) analysis, corrosion, wear resistance, as well as biocompatibility. The results showed that the titanium was completely transformed from (α to (the phase after milling time of 4 h and consolidation temperature of 1000 °C. Good results for both wear resistance, biocompatibility and corrosion resistance came from the addition of niobium. Biocompatibility slightly decreases with increasing the milling time and decreasing the consolidation temperature. This is due to the presence of FeO phase that is coming from ball contamination during the milling process. The wear resistance decreases with increasing both the milling time and consolidation temperature. The good corrosion resistance and adequate wear resistance, further that the investigated alloy is an attractive material for an orthopedic implant.
A review—metastable β titanium alloy for biomedical applications
Journal of Engineering and Applied Science
Titanium and its alloys have already been widely used as implant materials due to their outstanding mechanical characteristics and biocompatibility. Notwithstanding this, researchers and businesses alike have continued to actively pursue superior alloys since there are still problems which need urgent consideration. One of these is a noteworthy difference in the implant material’s elastics modulus and that of natural bone, which result into an issue of stress shielding. With prolonged use Ti alloys releases dangerous ions. The Ti alloy surface has a low bioactivity, which prolongs the healing process. β-Ti alloys could be used as viable alternatives when creating dental implants. Additionally, β-Ti alloys characteristics, such as low Young modulus, increased strength, appropriate biocompatibility, and strong abrasion and corrosion resistance, serve as the necessary evidence. Ti alloys when altered structurally, chemically, and by thermomechanical treatment thereby enabling the creat...
Mechanical Characterization of Ti–12mo–13nb Alloy for Biomedical Application Hot Swaged and Aged
Materials Research, 2015
Beta titanium alloys were developed for biomedical applications due to the combination of its mechanical properties including low elasticity modulus, high strength, fatigue resistance, good ductility and with excellent corrosion resistance. With this perspective a metastable beta titanium alloy Ti-12Mo-13Nb was developed with the replacement of both vanadium and aluminum from the traditional alloy Ti-6Al-4V. This paper presents the microstructure, mechanical properties of the Ti-12Mo-13Nb hot swaged and aged at 500 o C for 24 h under high vacuum and then water quenched. The alloy structure was characterized by X-ray diffraction and transmission electron microscopy. Tensile tests were carried out at room temperature. The results show a microstructure consisting of a fine dispersed α phase in a β matrix and good mechanical properties including low elastic modulus.
Micro-hardness and Young's modulus of a thermo-mechanically processed biomedical titanium alloy
Biomaterials and Biomedical Engineering, 2014
This paper presents a study on the influence of different thermo-mechanical processing (TMP) parameters on some required properties such as micro-hardness and Young's modulus of a novel near β alloy Ti-20.6Nb-13.6Zr-0.5V (TNZV). The TMP scheme comprises of hot working above and below β phase, solutionizing treatment above and below β phase coupled with different cooling rates. Factorial design of experiment is used to systematically collect data for micro-hardness and Young's modulus. Validity of assumptions related to the collected data is checked through several diagnostic tests. The analysis of variance (ANOVA) is used to determine the significance of the main and interaction effects. Finally, optimization of the TMP process parameters is also done to achieve optimum values of the micro-hardness and Young's modulus.
IOSR Journals , 2019
There are a number of advantages of using titanium alloys for biomedical applications. The purpose of this investigation was to examine the effects of alloying and heat treatment on the microstructure and hardness of biomedical Ti-Cr-Co alloys. Samples were prepared by melting pure elements in a laboratory arc furnace under an argon atmosphere. They were metallographically prepared and analyzed with the X-ray diffraction method. Microstructures of experimental alloys were taken with digital camera and analyzed with computer program Image Tool. Hardness was measured using the Vickers indentation method. Heat treatment was carried out at 950°C over 3 hours with quenching in water. The microstructure and hardness were analyzed after the heat treatment. The results obtained show heat treatment effects the volume ratio of phases in alloys with 10 at.% of cobalt, but alloys with 5 at.% of this alloying element were retained as single-phase. Also, hardness of investigated alloys depends on content of alloying elements (chromium and cobalt), but the effect of heat treatment on the hardness of this alloys was negligible. The results shows that the microstructure and hardness are dependent on the addition of alloying elements as well as heat treatment of Ti-Cr-Co alloys.