Material Characteristics and Biocompatibility of Low Ridigity Titanium Alloys for Biomedical Applications

Titanium and titanium alloys possess some attractive properties, such as excellent corrosion and erosion resistance, low densities, high specific strength and modulus, enabling them extensively used in aeronautical, marine, chemical and biomedical applications and so on. Nevertheless, Recent years, the corrosion resistance of titanium and titanium alloys is required to elevate in some fields, proper surface modification such as surface oxidation can solve the problems effectively. In this paper, the recent investigations of thermal oxidation and micro-arc oxidation to improve the corrosion resistant of titanium and its alloys are reviewed. The structures, properties and their influence factors of the coatings are analysed systematically. And the existing problems and the future prospect of the further researches is mentioned.

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Thermal Processing of a Titanium Alloy for Aeronautical Applications

Materials Science Forum ◽

10.4028/www.scientific.net/msf.907.214 ◽

2017 ◽

Vol 907 ◽

pp. 214-219 ◽

Cited By ~ 1

Author(s):

Dragoș Cristian Achiței ◽

Petrică Vizureanu ◽

Mirabela Georgiana Minciună ◽

Mustafa Al Bakri Abdullah Mohd ◽

Andrei Victor Sandu

Keyword(s):

Titanium Alloys ◽

Biomedical Applications ◽

Metastable Phase ◽

Hardness Measurement ◽

Heat Treatments ◽

Low Weight ◽

Experimental Researches ◽

Hardening Heat Treatment ◽

Quenching And Tempering ◽

Electronic Microscope

The titanium alloys are used in aeronautical applications (up to 75% of titanium alloys), reinforcements, biomedical applications, army industry, because of a high traction resistance, low weight, excellent corrosion resistance and capacity to resist at extreme temperatures. However, some titanium applications are restricted by the small hardness, high friction coefficient and low usage resistance. The paper shows the experimental researches made on Ti-6Al-4V alloy, subjected to quenching and tempering heat treatments. The hardening heat treatment of titanium alloys with α+β structure consists in stabilization phenomenon of β solid solution dissolved in α’ and α’’ metastable phase. After quenching and tempering heat treatments, are obtained good mechanical properties in biphasic alloys, maintaining the plasticity characteristics in reasonable limits. The efficiency evaluation of heat treatments was realized through micro-hardness measurement and structure analyses on electronic microscope.

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