Titanium Alloys in Aviation And Marine Engineering

Titanium alloy is called "air metal" or "ocean metal". It's widely used in aviation and marine engineerings such as ships and offshore oil. Titanium alloy in aviation and marine engineering has nine characteristics.

1. Lower density: titanium alloy in aviation is one of the three major light metals "aluminum, magnesium, and titanium", with a density of 4.51kg/m3.

2. Higher strength, including tensile strength, creep strength, and fatigue strength. Matching with a lower density, it presents greater superiority in terms of specific strength. This is precisely the core factor in which titanium alloy in marine engineering can play an important role in lightweight.

3. Excellent corrosion resistance. Excellent seawater corrosion resistance is one of them, as shown in the following table:

4. Wide operating temperature range, the operating temperature of titanium alloy in aviation ranges from minus 269℃ to above minus 600℃.

5. Larger elastic deformation capacity

6. Good impact resistance. Titanium alloy in marine engineering has high impact resistance and live ammunition resistance. The ability to resist collisions.

7. Lower coefficient of expansion This feature is especially suitable for the requirements of the aviation and naval power plants for the control of dimensional changes during the use of parts and components.

8. Non-magnetic, suitable for the normal use of some detection, communication, and control methods in aviation and ships.

9. Better process performance

It usually have good processing properties such as casting, forging, welding, and 3D printing, which are the factors that determine whether they can win in the process of selecting materials for aviation and naval engineering.

Use of titanium alloy

1. Application of titanium alloy in aviation

Titanium alloy in aviation has occupied the main position of the cold end of the aero engine for a long time. The amount of titanium alloy used in some aero-engines in China is continuously increasing and is approaching the advanced level of foreign countries

The amount of titanium alloy used in the new military turbofan engine under development is estimated to be 30% to 35%. The titanium alloy weight of the new commercial turbofan engine is expected to be around 23%.

2. Application of Titanium Alloy in Marine Engineering

The United States and Norway are in a leading position in this field. Some drilling platforms use hundreds of tons of titanium. The United States RMI Titanium Company provides Norwegian ConocoPhillips with titanium alloy in marine engineering drill pipes that have been successfully applied to dozens of oil wells, saving system costs 40%.

The Heidrun oilfield semi-submersible floating drilling platform of the Norwegian branch of the North Sea Oilfield uses titanium alloy in marine engineering risers to reduce the weight of the entire system by 50%, the riser lifting force by 63%, and the system cost by 40%. The expected service life can be extended to 25 years.

Grant Prideco of the United States applied titanium alloy in marine engineering to drill pipes in 2000, which reduced the lifting force of the drill tool by 30% and the torque by 30% to 40%.

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