titanium alloys (brochure)
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7/27/2019 Titanium Alloys (brochure)
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TITANIUM ALLOYS
A. INTRODUCTION
1. What is the Titanium?
Titanium is a chemical element with the symbol Ti
and atomic number 22. It has a low density and is astrong, lustrous, corrosion-resistant, transition
metal with a silver color.
2. Uses of the Titanium
Titanium has low specific weight (density) (4.51
g/cm ³), excellent corrosion resistance and high
strength/weight ratio. So; chemical, aerospace,
marine and medical spaces are used. Also; titanium
applications what petrochemical industry and
sport equipment manufacture are used.
Titanium can be alloy some elements which such
as iron, aluminum, vanadium, molybdenum.
Although Titanium is expensive, it used in industry
because, titanium is resistant.
3. Titanium is Expensive, why?
The reason for expensive titanium metal,
compounds the difficulty to obtain in pure form.
Titanium combined oxygen, nitrogen, hydrogen,
carbon and iron at high temperature.
4. Some Chemical Properties of Titanium
Has a high affinity with oxygen, titanium is
chemically. Titanium room temperature freshly
prepared surfaces, forms a tight oxide layer is
microscopic. This oxide film of titanium prevents
further chemical reaction.
This titanium, as well as mineral acids, salts, andthe corrosion resistance against oxidizing acid
solutions also describes. Titanium has a tendency
to oxidize rapidly in air when heated above 650°C.
B. TITANIUM ALLOYS
1. Structure of the Titanium Alloys
Titanium alloys, alpha, beta, alpha-beta titanium
alloys can be divided into 3 groups according to. At
low temperatures the structure of alpha-titanium,
while high temperatures is referred to as beta-
titanium. With the addition of alloying elements
titanium beta-titanium structure of high-
temperature, low-temperature alpha-titanium
structure, conversion rate, and temperature
changes.
Aluminum, oxygen, nitrogen, carbon, tin, elementssuch as alpha stabilizers and hydrogen, silver, gold,
chromium, iron, vanadium, magnesium,
molybdenum, beta-stabilizing alloying elements
are known as elements such as. Depending on the
titanium alloy elements involved in the
mechanical, physical and chemical properties
change.
2. Examples of the Titanium Alloys
Titanium – Zirconium Alloy: Titanium and
zirconium atomic diameters are very close to
each other. Zirconium slightly affects the
temperature of polymorphic transformation
and modification of titanium looks well.
Containing 8-12% zirconium, titanium alloys,
capable of forging good room temperatures, has
Elongation features, too. Alloys are heat-stable.
Titanium – Tin Alloy: Tin hardens titanium
much more than zirconium. Lower than
aluminum is capable of hardening.
Titanium – Aluminum – Zirconium – Tin
Alloy: At high temperatures zirconium is more
efficient than room temperature to harden
titanium. Breakage and short-term strength of
zirconium has the highest resistance. Aluminum
also gives good results under these conditions.
Also increases as the amount of zirconium
fragility.
The aircraft industry is the most widely used
titanium alloys and their properties;
99.0% Ti: Used in a wide range of walls of the
combustion, compressor coatings exhaustcoatings, body partition walls at plane.
Ti – 5 Al – 2.5 Sn Alfa Typing Alloy: It runs up
to 480°C at plate connections, and other forged
components of aircraft exhaust. It is used
widely at rocket fuel tanks, aircraft gas turbine
compressors, welded joints and hollow
compressor stator fins.
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C. SHAPE MEMORY ALLOYS
1. What is the Shape Memory Alloys?
Shape memory alloys have the ability to rotate the
actual shape and size. They are easily deformed at
low temperature in martensitic phase. They are
return to the original shape at high temperature in
austenitic phase.
2. History of the Shape Memory Alloys
The first reported steps towards the discovery of
the shape-memory effect were taken in the 1930s.
Nickel-titanium alloy discovered at 1962.
3. Types of the Shape Memory Alloys
Nickel-Titanium Alloys: Nickel-Titanium
alloys have an excellent corrosion resistance. In
addition, nickel-titanium alloys have a high
ductility. Nickel-Titanium alloys binary alloy
system and they are co-atoms intermetallic
compound. The intermetallic compound can
solve a lot of nickel and titanium. Thus, other
elements can participate in this compound.
4. Uses of the Nickel – Titanium Alloys
Nickel-Titanium alloys are highly resistant to
corrosion. So we used in biomedical applications.
Nickel-Titanium alloys have super-elastic
properties. For example, spectacle frames. Doctors
give or take liquid in vessels and body cavity with
catheters. In addition, braces made from it.
WORDS:
Corrosion-resistant: Korozyon dayanıklılığı
Stabilizer: Stabilizatör
Polymorphic-transformation: Polimorfik
dönüşüm
Heat-stable: Isıya dayanıklı
Hardening: Sertleşme
Breakage: Kırılma
Fragility: Kırılganlık
Cementation: Sementasyon, tavlama
Martensitic phase: Martensitik faz
Austenitic phase: Östenitik faz
NITINOL: Nikel-Titanyum alaşımı (Nikel-
Titanyum Naval Ordnance Laboratuvarı)
Ductility: Süneklik, yumuşaklık
Intermetallic compound: İntermetalik bileşik
T I T A N I U M
A L L O Y S
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