2 results listed
Titanium has low density (4.5 g / cm³), high specific strength, fracture toughness, fatigue strength, resistance to
crack propagation, high toughness at low temperature and excellent corrosion resistance [1]. Pure Titanium is anti-toxic,
anti-allergic and completely biocompatible [2]. Titanium has an allotropic structure [3]. Aluminum, tin, gallium and
zirconium elements known as alpha stabilizers exhibit good properties at high temperatures. The elements of vanadium,
molybdenum, niobium, tantalum, chromium which decrease phase transformation temperature are known as β stabilizer.
When β-stabilizing elements were examined, they were usually found in brittle structures [4]. The creep resistance of α
alloys is better than β alloys and α alloys are used for high temperature applications. β alloys can be heat treated and can
not be applied to α alloys. The α + β alloys consist of a mixture of α and β phases, and these alloys have a good formability
properties [5].
International Symposium on Light Alloys and Composite Materials
UHAKS
Seda Başer
Erdem Kara
Hasan Kotan
Ahmet Burçin BATIBAY
Abstract
Among metallic biomaterials, titanium (Ti) and alloys offer many advantages over other materials [1]. Pure Ti
and Ti alloys are the most conspicuous group of biomedical implant materials due to their properties such as low elastic
modulus, super biocompatibility, high strength / density ratio [2]. Commercially pure Ti and Ti-6Al-4V alloys are
considered important biomaterials because they have many advantages such as these [3]. However, the high elastic
modulus of pure Ti (102-105 GPa) compared to human bone tissues (4-30 GPa) can cause discrepancy between artificial
implant materials and surrounding natural bones which restricts the use o Ti alloys. In addition, the Ti-6Al-4V alloy
contains cytotoxic elements that can cause long-term health problems in the human body [6-7]. As a result, alloys without
cytotoxic elements have been developed to overcome above the specified limitations [8]. In the majority of medical
applications, Tantalum (Ta), Niobium (Nb), Tin (Sn) and their alloys have begun to be used. Nb has excellent corrosion
resistance, good biocompatibility that do not cause a negative tissue reaction [9].
International Symposium on Light Alloys and Composite Materials
UHAKS
Erdem Kara
Seda Başer
Ahmet Burçin Batibay
Hasan Kotan