Imprecise knowledge based design and development of titanium alloys for prosthetic applications

Abstract

Sultana, N. (2015) Imprecise knowledge based design and development of titanium alloys for prosthetic applications.Journal Abstract Imprecise knowledge on the composition-processing-microstructure-property correlation of titanium alloys combined with experimental data are used for developing rule based models for predicting the strength and elastic modulus of titanium alloys. The developed models are used for designing alloys suitable for orthopaedic and dental applications. Reduced Space Searching Algorithm is employed for the multi-objective optimization to find composition, processing and microstructure of titanium alloys suitable for orthopaedic applications. The conflicting requirements attributes of the alloys for this particular purpose are high strength with low elastic modulus, along with adequate biocompatibility and low costs. The 'Pareto' solutions developed through multi-objective optimization show that the preferred compositions for the fulfilling the above objectives lead to β or near β alloys. The concept of decision making employed on the solutions leads to some compositions, which should provide better combination of the required attributes. The experimental development of some of the alloys has been carried out as guided by the model-based design methodology ©2015. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/ 2 presented in this research. Primary characterizations of the alloys show encouraging results in terms of the mechanical properties.

Effects of Solution Treating on Microstructural and Mechanical Properties of a Heavily Deformed New Biocompatible Ti–Nb–Zr–Fe Alloy

“…During the last decade, major efforts have been dedicated to studying multicomponent Ti alloys containing non-toxic and non-allergic alloying elements such as Nb, Zr, and Ta due to their appropriate combination of properties: good mechanical properties, high corrosion resistance in body fluids or simulated body fluids, and enhanced biocompatibility [1][2][3][4][5][6]. If one considers the mechanical properties, i.e., the demand for a low modulus of elasticity in implantable biomedical applications [7][8][9], it was demonstrated that the values of elastic modulus are strongly dependent on thermomechanical processing parameters [10][11][12].…”

Design of the ultrahigh molecular weight polyethylene composites with multiple nanoparticles: An artificial intelligence approach

“…Among the available methods for such analysis, the connection weight method 47 is simple and delivers similar results compared to other methods. This method is used in previous studies of materials design, 35–36 as well as in this study. This method uses input layer to hidden layer weight and hidden layer to output layer connection weights for the estimation of variable importance.…”

“…[33][34][35] GA has been successfully used to design Ti alloys for prosthetic applications. 36 The mechanical and tribological characterization of two designed and developed composites are studied. The structural characterizations are also made to get better understanding of the mechanical and tribological behavior of the material.…”

Behaviour of a biocompatible titanium alloy during orthogonal micro-cutting employing green machining techniques

“…The great feature that Ti-6Al-4V (112 GPa), Ti-6Al-7Nb (110 GPa) and other titanium alloys has is a low elastic modulus, close to the elastic modulus of the bone (30 GPa), in comparison with Co-Cr alloys (240 GPa) and AISI 316-L stainless steel (210 GPa) [33]. Amongst the titanium alloys, the Ti-6Al-4V titanium alloy is the most employed in biomedical applications [34]. However, the use of materials that remove vanadium (V-free) from titanium alloys for medical application has been debated since the mid-1980s in the USA [35].…”