New Titanium Alloys to be Considered for Medical Implants

2009 ◽  
pp. 45-45-15 ◽  
Author(s):  
Y Okazaki ◽  
Y Ito ◽  
A Ito ◽  
T Tateishi
Keyword(s):  
Titanium Alloys ◽  
Medical Implants

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.

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.

scholarly journals Effects of Mo and Pd on Corrosion Resistance of V-Free Titanium Alloys for Medical Implants

1997 ◽  
Vol 38 (4) ◽  
pp. 344-352 ◽  
Author(s):  
Yoshimitsu Okazaki ◽  
Kenji Kyo ◽  
Yoshimasa Ito ◽  
Tetsuya Tateishi
Keyword(s):  
Corrosion Resistance ◽  
Titanium Alloys ◽  
Medical Implants

The Aspects of Practical Application of Ultrafine-Grained Titanium Alloys Produced by Severe Plastic Deformation

2010 ◽  
Vol 667-669 ◽  
pp. 1183-1187 ◽  
Author(s):  
Evgeny V. Naydenkin ◽  
Ilya V. Ratochka ◽  
Galina P. Grabovetskaya
Keyword(s):  
Plastic Deformation ◽  
Severe Plastic Deformation ◽  
Titanium Alloys ◽  
Elevated Temperatures ◽  
Acoustic Properties ◽  
Coarse Grained ◽  
Medical Implants ◽  
Ultrafine Grained ◽  
Mechanical And Physical Properties ◽  
Ultrasound System

The mechanical and physical properties of ultrafine-grained titanium alloys produced by severe plastic deformation are considered. It is found that the formation of ultrafine-grained structure in these materials causes a significant enhancement in their mechanical properties at room temperature and in their resistance to hydrogen embrittlement as well as a change in their acoustic properties. Moreover, superplasticity is realized in these materials at less elevated temperatures relative to the respective coarse grained counterparts. It is shown that the above changes in material properties permit optimization of conditions by the production of items from the titanium alloys, e.g. medical implants having the requisite strength and stepped waveguides having long life even in the high power density conditions of an ultrasound system.

scholarly journals Antibacterial Ti-Mn-Cu alloys for biomedical applications

2020 ◽  
Author(s):  
Mohammad Alqattan ◽  
Linda Peters ◽  
Yousef Alshammari ◽  
Fei Yang ◽  
Leandro Bolzoni
Keyword(s):  
Titanium Alloys ◽  
Lamellar Structure ◽  
Biomedical Applications ◽  
Mechanical Performance ◽  
Antibacterial Efficacy ◽  
Medical Implants ◽  
Manufacturing Costs ◽  
Cu Alloys ◽  
Beta Titanium ◽  
Surgical Infections

Abstract Titanium alloys are common biomedical materials due to their biocompatibility and mechanical performance. However, titanium alloys are expensive and, unless surface treated, generally cannot prevent surgical infections related to bacteria which can damage the integrity of the implant. In this study, new titanium alloys were developed via powder metallurgy and the addition of manganese and copper, respectively, aiming to limit the manufacturing costs and induce new functionality on the materials including antibacterial response. The addition of manganese and copper to titanium significantly changes the behaviour of the Ti-Mn-Cu alloys leading to the successful stabilization of the beta titanium phase, great refinement of the typical lamellar structure, and achievement of materials with low level of porosity. Consequently, it is found that the mechanical performance and the antibacterial efficacy are enhanced by the addition of a higher amount of alloying elements. The manufactured Ti-Mn-Cu alloys fulfil the requirements for structural biomedical implants and have antibacterial response making them potential candidates for permanent medical implants.

Production of Titanium Alloys for Medical Implants by Powder Metallurgy

2001 ◽  
Vol 189-191 ◽  
pp. 443-448 ◽  
Author(s):  
Vinicius André Rodrigues Henriques ◽  
Cosme Roberto Moreira Silva
Keyword(s):  
Powder Metallurgy ◽  
Titanium Alloys ◽  
Medical Implants
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