Modification Of The Structure And Properties Of The Titanium Alloy Ti6Al4V In Biomedical Applications

Abstract

From the time when Per-Ingvar Brånemark discovered oseointegration properties of titanium in 1952 a large-scale studies on the issue of usability this metal in surgery were started. Thanks to the parallel research conducted on independent centers managed to get a number of metal alloys which were implanted into the human body in the form of implants. Among the alloys produced appeared alloy of aluminum and vanadium Ti6Al4V. The mechanical properties, high biocompatibility, low density and for this relatively low-cost, caused that the alloy began to be used as a material for biomedical applications. In the present article analyzed the possibility of modifying the properties of the alloy, by choosing another method of producing – method of injection casting with suction. A comparative analysis of the input material - the alloy commercially produced in the form of a rod of the same material melted by injection under vacuum and in air were carried out. The studies results indicate that using method of injection casting with suction to produce the final item influence on significant improvement in mechanical properties as a result of fragmentation of the grains at the element surface. The mechanical properties play a key role in a tissue-implant-bone system.

Mechanical Properties and Microstructure of DMLS Ti6Al4V Alloy Dedicated to Biomedical Applications

“…Titanium and titanium-based alloys have been widely applied to medical materials, orthopedic implants and dental implants over the last few decades [8]. Among the different types of titanium alloys, Ti-6Al-4V remains the most widely used, as a material with a range of appropriate properties, such as higher strength, lower modulus of elasticity, better corrosion resistance and superior biocompatibility compared to other metallic biomaterials [9,10,11]. High corrosion resistance is primarily due to the spontaneous formation of the protective passive TiO 2 film on titanium surfaces [12,13].…”

Mechanical and Microstructural Response of Near Beta Ti Alloys to Hot Tensile Testing

“…Beta and near-beta titanium alloys are widely used in automotive, medical and aerospace applications due to their excellent mechanical properties as well as low density [1,2]. Different thermal or thermomechanical treatments in single-phase beta or two-phase alpha+beta regions have been prescribed to develop the desirable mechanical properties in these alloys [3,4].…”

Characteristic of Oxide Layers Obtained on Titanium in the Process of Thermal Oxidation

“…A natural oxide layer plays a crucial role in biocompatibility and reduces the penetration of ions of alloying elements to the human body. However, because the passive layers, in their natural form, are very thin, they do not ensure an appropriate level of resistance to tribological wear, which limits the broader application of titanium in medicine [6,7]. The poor tribological properties of titanium result primarily from a high and unstable coefficient of friction [8].…”