scholarly journals THE EFFECT OF DIFFERENT FORMS OF OXYGEN ON PROPERTIES OF BETA TITANIUM ALLOYS

2018 ◽  
Vol 58 (3) ◽  
pp. 179 ◽  
Author(s):  
Jaroslav Málek ◽  
František Hnilica ◽  
Sonia Bartáková ◽  
Patrik Míka ◽  
Jaroslav Veselý
Keyword(s):  
Mechanical Properties ◽  
Solid Solution ◽  
Titanium Alloys ◽  
Titanium Powder ◽  
Aerospace Industry ◽  
Weight Ratio ◽  
High Strength ◽  
Beta Titanium ◽  
Oxide Particles ◽  
Beta Titanium Alloys

The beta-titanium alloys are widely used in many applications (medicine, aerospace industry etc.) due to their superior properties, such as corrosion resistance, biocompatibility and high strength to weight ratio. One of the ways how to increase the strength of those alloys is the addition of oxygen. The oxygen can be present in various forms in the alloy – in a solid solution or in the form of oxides. In this work, the effect of two forms of oxygen (i.e., solid solution and dispersion particles) was studied. Two alloys, one arc melted with different oxygen additions and one prepared via powder metallurgy where the titanium powder was oxidized, were prepared. The microstructure and mechanical properties were studied. A significant increase in strength with increasing the oxygen content in the solid solution has been observed. However, the powder oxidation has almost no effect on a tensile strength probably due to quite large interparticle distances between titanium oxide particles.

Mechanical Behaviour of Beta Titanium Alloys

2021 ◽  
Vol 1016 ◽  
pp. 964-970
Author(s):  
Nageswara Rao ◽  
Geetha Manivasagam
Keyword(s):  
Heat Treatment ◽  
Titanium Alloys ◽  
Dynamic Properties ◽  
Solution Treatment ◽  
Weight Ratio ◽  
High Strength ◽  
Static Properties ◽  
Beta Titanium Alloy ◽  
Beta Titanium ◽  
Beta Titanium Alloys

Beta titanium alloys have several attractive features; this has resulted in this group of alloys receiving much attention since 1980’s. Among the attributes which distinguish them for their superiority over other structural materials are (i) high strength to which they can be heat treated, resulting in high strength to weight ratio (ii) high degree of hardenability which enables heat treatment in large section sizes to high strength levels (iii) excellent hot and cold workability, making them as competitive sheet materials etc. The standard heat treatment consists of solution treatment in beta or alpha plus beta phase field followed by aging. However, certain aging treatments can render the materials in a state of little or no ductility; the designer has to be aware of this behaviour and has to keep away from such treatments while working with the materials. Such unfavourable aging treatments may adversely affect not only the static properties such as reduction in area and elongation in a tensile test, but also dynamic properties such as impact toughness. Results of fractographic studies are in line with those of mechanical testing. The authors would present the foregoing analysis, based primarily on the wide-ranging researches they carried out on beta titanium alloy Ti15-3 and to some extent data published by researchers on other grades of beta titanium alloys. An attempt is made to explain the mechanisms underlying the embrittlement reactions that take place in beta titanium alloys under non-optimal aging treatments.

scholarly journals High-strength metastable beta-titanium alloys for biomedical applications

JOM ◽  
2005 ◽  
Vol 57 (7) ◽  
pp. 5-5 ◽  
Author(s):  
J. I. Qazi ◽  
B. Marquardt ◽  
H. J. Rack
Keyword(s):  
Titanium Alloys ◽  
Biomedical Applications ◽  
High Strength ◽  
Beta Titanium ◽  
Metastable Beta ◽  
Beta Titanium Alloys

High strength beta titanium alloys: New design approach

2015 ◽  
Vol 628 ◽  
pp. 297-302 ◽  
Author(s):  
I.V. Okulov ◽  
H. Wendrock ◽  
A.S. Volegov ◽  
H. Attar ◽  
U. Kühn ◽  
...  
Keyword(s):  
Titanium Alloys ◽  
High Strength ◽  
Design Approach ◽  
Beta Titanium ◽  
Beta Titanium Alloys

High Performance Beta Titanium Alloys as a New Material Perspective for Cardiovascular Applications

2012 ◽  
Vol 706-709 ◽  
pp. 578-583 ◽  
Author(s):  
Frédéric Prima ◽  
F. Sun ◽  
Philippe Vermaut ◽  
Thierry Gloriant ◽  
D. Mantovani ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Stainless Steel ◽  
Titanium Alloys ◽  
Metal Ion ◽  
High Performance ◽  
Mechanical Twinning ◽  
High Yield ◽  
Dislocation Slip ◽  
Beta Titanium ◽  
Beta Titanium Alloys

During the last few decades, titanium alloys are more and more popular and developed as biomedical devices because of their excellent biocompatibility, very good combination of mechanical properties and prominent corrosion resistance [1-3]. Recently, a new generation of beta titanium alloys dedicated to biomedical applications has been developed. Based on biocompatible alloying elements such as Ta, Nb, Zr and Mo, these alloys were designed as low modulus alloys [4] or nickel-free superelastic materials [5, 6] mainly for orthopedic or dental applications as osseointegrated implants. Beta type titanium alloys take great advantages from their capacity to display several deformation mechanisms as a function of beta phase stability. Therefore, from low to high beta stability, stress assisted martensitic phase transformation (β-α’’), mechanical twinning or simple dislocation slip can alternatively be observed [7]. As a consequence, a very large range of mechanical properties can be reached, including low apparent modulus, large reversible elastic deformation or high yield stress. Although titanium alloys display now a long history of successful applications in orthopedic and dental devices, none of them have been commercially exploited in the area of coronary stents, despite their superior long term haemocopatibility compared to the 316L stainless steel. However, according to previous researches on the biocompatibility of various metals, the corrosion behavior of stainless steel is dominated by its nickel and chromium components, which may induce redox reaction, hydrolysis and complex metal ion–organic molecule binding reactions, whereas none are observed with titanium [8, 9].

Aqueous environmental crack propagation in high-strength beta titanium alloys

1995 ◽  
Vol 26 (5) ◽  
pp. 1257-1271 ◽  
Author(s):  
Lisa M. Young ◽  
George A. Young ◽  
John R. Scully ◽  
Richard P. Gangloff
Keyword(s):  
Crack Propagation ◽  
Titanium Alloys ◽  
High Strength ◽  
Beta Titanium ◽  
Beta Titanium Alloys
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