scholarly journals Second-generation Titanium alloys Ti-15Mo and Ti-13Nb-13Zr: A Comparison of the Mechanical Properties for Implant Applications

2020 ◽  
Vol 321 ◽  
pp. 05006
Author(s):  
Florian Brunke ◽  
Carsten Siemers ◽  
Joachim Rösler
Keyword(s):  
Mechanical Properties ◽  
Titanium Alloys ◽  
Second Generation ◽  
Stress Shielding ◽  
Medical Engineering ◽  
High Strength ◽  
Medical Implants ◽  
Alloying Element ◽  
Bone Degradation ◽  
First Choice

Due to their outstanding mechanical properties, excellent corrosion resistance and biocompatibility titanium and titanium alloys are the first choice for medical engineering products. Alloys currently used for implant applications are Ti-6Al-4V (ELI) and Ti-6Al-7Nb. Both alloys belong to the class of (α+β)-alloys and contain aluminium as an alloying element. Aluminium is cytotoxic and can cause breast cancer. In addition, the stiffness of (α+β)-alloys is relatively high which can lead to stress shielding, bone degradation and implant loss. For this reason, second-generation titanium alloys like Ti-15Mo (solute-lean metastable β-alloy) and Ti-13Nb-13Zr (β-rich (α+β)-alloy) have been developed. However, their application in medical implants is limited due to a relatively low strength. Therefore, in the present study, the mechanical properties of Ti-15Mo and Ti-13Nb-13Zr have been optimised by thermomechanical treatments to achieve high strengths combined with low stiffnesses. Different phase compositions have been used, namely, α-, β- and ω-phase in Ti-15Mo and α-, β- and αʺ-phase in Ti-13Nb-13Zr. For Ti-15Mo, the required mechanical properties’ combination could not be achieved whereas Ti-13Nb-13Zr showed high strength and a low Young’s modulus after a dedicated thermo-mechanical treatment. This makes the latter alloy a good option for replacing the (α+β)-alloys in implant applications in the future.

Review on the mechanical properties and biocompatibility of titanium implant: The role of niobium alloying element

2021 ◽  
Vol 112 (6) ◽  
pp. 505-513
Author(s):  
Ahmad Farrahnoor ◽  
Hussain Zuhailawati
Keyword(s):  
Mechanical Properties ◽  
Titanium Alloys ◽  
Elastic Moduli ◽  
Stress Shielding ◽  
Titanium Implant ◽  
Implant Loosening ◽  
Alloying Element ◽  
Different Temperatures ◽  
Low Modulus

Abstract Biomedical titanium alloys with elastic moduli close to that of cortical bone have gained great attention in the field of bone implantation. A low modulus is desirable in an implant to prevent stress shielding, which usually leads to critical clinical issues, such as bone resorption and implant loosening. The use of β-type titanium with nontoxic alloying elements, such as niobium, as a novel candidate of implant material for replacing failed hard tissues has shown great potential. This review describes a titanium implant application alloyed with niobium and the mechanical properties and bioactivity of various titanium alloys sintered at different temperatures.

scholarly journals Modification of Mechanical Properties of High-Strength Titanium Alloys VT23 and VT23M Due to Impact-Oscillatory Loading

Metals ◽  
2019 ◽  
Vol 9 (1) ◽  
pp. 80 ◽  
Author(s):  
Mykola Chausov ◽  
Janette Brezinová ◽  
Andrii Pylypenko ◽  
Pavlo Maruschak ◽  
Liudmyla Titova ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Titanium Alloys ◽  
High Strength ◽  
The Self ◽  
Self Organization ◽  
Two Phase ◽  
Rolled Metal ◽  
Technological Method ◽  
Equilibrium Processes ◽  
Production Conditions

A simple technological method is proposed and tested experimentally, which allows for the improvement of mechanical properties in sheet two-phase high-strength titanium alloys VT23 and VT23M on the finished product (rolled metal), due to impact-oscillatory loading. Under impact-oscillatory loading and dynamic non-equilibrium processes (DNP) are realized in titanium alloys, leading to the self-organization of the structure. As a result, the mechanical properties of titanium alloys vary significantly with subsequent loading after the realization of DNP. In this study, the test modes are found, which can be used in the production conditions.

scholarly journals A Study on Rotary Friction Welding of Titanium Alloy (Ti6Al4V)

2019 ◽  
Vol 2019 ◽  
pp. 1-9 ◽  
Author(s):  
Ho Thi My Nu ◽  
Truyen The Le ◽  
Luu Phuong Minh ◽  
Nguyen Huu Loc
Keyword(s):  
Mechanical Properties ◽  
Titanium Alloys ◽  
Friction Welding ◽  
Base Material ◽  
Welding Process ◽  
High Strength ◽  
Fusion Welding ◽  
Experimental Results ◽  
Thermomechanical Model ◽  
Rotary Friction Welding

The selection of high-strength titanium alloys has an important role in increasing the performance of aerospace structures. Fabricated structures have a specific role in reducing the cost of these structures. However, conventional fusion welding of high-strength titanium alloys is generally conducive to poor mechanical properties. Friction welding is a potential method for intensifying the mechanical properties of suitable geometry components. In this paper, the rotary friction welding (RFW) method is used to study the feasibility of producing similar metal joints of high-strength titanium alloys. To predict the upset and temperature and identify the safe and suitable range of parameters, a thermomechanical model was developed. The upset predicted by the finite element simulations was compared with the upset obtained by the experimental results. The numerical results are consistent with the experimental results. Particularly, high upset rates due to generated power density and forging pressure overload that occurred during the welding process were investigated. The performances of the welded joints are evaluated by conducting microstructure studies and Vickers hardness at the joints. The titanium rotary friction welds achieve a higher tensile strength than the base material.

scholarly journals An Overview on the Tribological Performance of Titanium Alloys with Surface Modifications for Biomedical Applications

Lubricants ◽  
2019 ◽  
Vol 7 (8) ◽  
pp. 65 ◽  
Author(s):  
Kaur ◽  
Ghadirinejad ◽  
Oskouei
Keyword(s):  
Wear Resistance ◽  
Corrosion Resistance ◽  
Titanium Alloys ◽  
Weight Ratio ◽  
High Strength ◽  
Surface Modifications ◽  
Tribological Performance ◽  
The Body ◽  
High Wear Resistance ◽  
Medical Implants

The need for metallic biomaterials will always remain high with their growing demand in joint replacement in the aging population. This creates need for the market and researchers to focus on the development and advancement of the biometals. Desirable characteristics such as excellent biocompatibility, high strength, comparable elastic modulus with bones, good corrosion resistance, and high wear resistance are the significant issues to address for medical implants, particularly load-bearing orthopedic implants. The widespread use of titanium alloys in biomedical implants create a big demand to identify and assess the behavior and performance of these alloys when used in the human body. Being the most commonly used metal alloy in the fabrication of medical implants, mainly because of its good biocompatibility and corrosion resistance together with its high strength to weight ratio, the tribological behavior of these alloys have always been an important subject for study. Titanium alloys with improved wear resistance will of course enhance the longevity of implants in the body. In this paper, tribological performance of titanium alloys (medical grades) is reviewed. Various methods of surface modifications employed for titanium alloys are also discussed in the context of wear behavior.

Mechanical properties of multicomponent cast high-strength titanium alloys of the martensitic class

1985 ◽  
Vol 27 (1) ◽  
pp. 59-61
Author(s):  
V. N. Moiseev ◽  
Yu. M. Dolzhanskii ◽  
K. K. Yasinskii ◽  
N. N. Cherkasov ◽  
I. A. Prostov
Keyword(s):  
Mechanical Properties ◽  
Titanium Alloys ◽  
High Strength ◽  
Martensitic Class

Development of Biomedical Near β Titanium Alloys

2009 ◽  
Vol 618-619 ◽  
pp. 303-306 ◽  
Author(s):  
Zhen Tao Yu ◽  
Gui Wang ◽  
Xi Qun Ma ◽  
Matthew S. Dargusch ◽  
Jian Ye Han ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Titanium Alloys ◽  
Young’S Modulus ◽  
Young's Modulus ◽  
Solution Treatment ◽  
High Strength ◽  
Alloy Chemistry ◽  
Solution Treated ◽  
Strength And Plasticity ◽  
Hot Rolled

The effects of alloy chemistry and heat treatment on the microstructure and mechanical properties of Ti-Nb-Zr-Mo-Sn near  type titanium alloys have been investigated. Near β titanium alloys consisting of non-toxic alloying elements Mo, Nb, Zr, Sn possess a low Young’s modulus, and moderate strength and plasticity. As the hot rolled TLM alloy (Ti-25Nb-3Zr-3Mo-2Sn) possesses high strength and low Young’s modulus a detailed investigation is performed for this alloy. Solution treatment of the hot rolled TLM alloy reduces strength and increases ductility without affecting the Young’s modulus. Ageing of the solution treated TLM alloy reduces elongation and increases the Young’s modulus with little change in strength. Both solution treated and aged conditions show features of two stage yielding associated with a strain induced martensitic transformation.

scholarly journals Microstructure formation and mechanical properties of isothermally-solidified titanium alloy joints brazed by a Ti – Zr – Cu – Ni – Be amorphous alloy foil

2020 ◽  
pp. 63-72
Author(s):  
P. V. Morokhov ◽  
A. A. Ivannikov ◽  
N. S. Popov ◽  
O. N. Sevryukov
Keyword(s):  
Mechanical Properties ◽  
Titanium Alloys ◽  
Educational Institution ◽  
Transient Liquid Phase ◽  
High Strength ◽  
Heterogeneous Structure ◽  
Physics Institute ◽  
Alloy Foil ◽  
Engineering Physics ◽  
Component Phase

Two titanium alloys, OT4 and VT6-c, with a pseudo-α and α + β structure, respectively, were brazed using transient liquid phase (TLP) bonding. To obtain high strength joints an amorphous foil (Ti – 12Zr – 22Cu – 12Ni – 1.5 Be – 0.8V wt.%) was used. Based on microstructural studies and analysis of two- and three-component phase diagrams, the mechanism of the microstructural evolution of the brazed seams of titanium alloys OT4 and VT6-c is described. Brazing at 800 °C with exposure for 0.5 h leads to the formation of a heterogeneous structure consisting of Widmanstätten, eutectoid, and eutectic. Brazed OT4 and VT6-c joints with the presence of a eutectic layer in the centre show low mechanical properties; their ultimate strength lies in a range from 200 to 550 MPa. Increasing the brazing temperature to 840 °C and the exposure time to 2 h, leads to the disappearance of the brittle eutectic component from the seam. This structure typically consists of Widmanstätten with a small number of eutectoid fractions. Joints with the absence of a eutectic layer in the brazed seam demonstrate a strength equal to the base titanium alloys. In this case, failure occurs in the base metal. For brazed samples from the OT4 alloy, the tensile strength value is σb = 750 ± 3 MPa, and for samples from VT6-c, σb = 905 ± 3 MPa. This work was supported by Competitiveness Growth Programme of the Federal Autonomous Educational Institution of Higher Education National Research Nuclear University MEPhI (Moscow Engineering Physics Institute).

Solid-state joining of aluminum to titanium: A review

2021 ◽  
pp. 146442072110108
Author(s):  
Vijay S Gadakh ◽  
Vishvesh J Badheka ◽  
Amrut S Mulay
Keyword(s):  
Mechanical Properties ◽  
Solid State ◽  
Titanium Alloys ◽  
Intermetallic Compounds ◽  
Welding Process ◽  
High Strength ◽  
Weld Interface ◽  
Fusion Welding ◽  
Cp Ti ◽  
Welding Processes

The dissimilar material joining of aluminum and titanium alloys is recognized as a challenge due to the significant differences in the physical, chemical, and metallurgical properties of these alloys, where the increasing demands for high strength and lightweight alloys in aerospace, defense, and automotive industries. Joining these two alloys using the conventional fusion techniques produces commercially unacceptable sound joints due to irregular, complex weld pool shapes, cracking and low strength, high residual stresses, cracks, and microporosity, and the brittle intermetallic compounds formation leads to poor formability or inferior mechanical properties. The formation of intermetallic compounds is inevitable but it is less severe in solid-state than in the fusion welding process. Hence, this article reviews on aluminum–titanium joining using different solid-state and hybrid joining processes with emphasis on the effect of process parameters of the different processes on the weld microstructure, mechanical properties along with the type of intermetallic compounds and defects formed at the weld interface. Among the various solid-state welding processes for aluminum–titanium joining, the following grades of aluminum and titanium alloys were employed such as cp Ti, Ti6Al4V, cp Al, AA1xxx, AA 2xxx, AA5xxx, AA6xxx, AA7xxx, out of which Ti6Al4V and AA6xxx alloys are the most common combination.

scholarly journals THE EFFECT OF DIFFERENT FORMS OF OXYGEN ON PROPERTIES OF BETA TITANIUM ALLOYS

2018 ◽  
Vol 58 (3) ◽  
pp. 179 ◽  
Author(s):  
Jaroslav Málek ◽  
František Hnilica ◽  
Sonia Bartáková ◽  
Patrik Míka ◽  
Jaroslav Veselý
Keyword(s):  
Mechanical Properties ◽  
Solid Solution ◽  
Titanium Alloys ◽  
Titanium Powder ◽  
Aerospace Industry ◽  
Weight Ratio ◽  
High Strength ◽  
Beta Titanium ◽  
Oxide Particles ◽  
Beta Titanium Alloys

The beta-titanium alloys are widely used in many applications (medicine, aerospace industry etc.) due to their superior properties, such as corrosion resistance, biocompatibility and high strength to weight ratio. One of the ways how to increase the strength of those alloys is the addition of oxygen. The oxygen can be present in various forms in the alloy – in a solid solution or in the form of oxides. In this work, the effect of two forms of oxygen (i.e., solid solution and dispersion particles) was studied. Two alloys, one arc melted with different oxygen additions and one prepared via powder metallurgy where the titanium powder was oxidized, were prepared. The microstructure and mechanical properties were studied. A significant increase in strength with increasing the oxygen content in the solid solution has been observed. However, the powder oxidation has almost no effect on a tensile strength probably due to quite large interparticle distances between titanium oxide particles.

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