Titanium alloy is an alloy composed of other elements based on titanium. In modern industry, titanium alloy has become the preferred material for high-performance structural parts with its excellent high strength, corrosion resistance, and heat resistance. In addition, titanium has unique functions such as biocompatibility, superconductivity, hydrogen storage and shape memory, which are widely used in medical devices, chemical industry, aerospace aviation, ships and other fields.
Currently, the application of titanium alloy is mainly concentrated in the following fields.
Titanium is an integral part of the aircraft's fuselage, engine and rocket parts. The United States applied titanium alloy materials to develop high-performance aircraft, such as x-31, x-30, etc. It has a very significant effect, which is that the M coefficient of the aircraft has increased by about three times, while the overall quality of the aircraft has decreased to 80%. Russia produces titanium alloy sheet, forgings, etc., which are used in aircraft manufacture of titanium alloy raw materials. Titanium alloys have also been heavily used in the development of China's Shenzhou spacecraft.
The ship and other equipment are immersed in water for a long time, so the materials are required to have the characteristics of high corrosion resistance, safe and reliable and long service life. Due to its wide range of strength, unique physical properties, excellent mechanical properties, corrosion resistance and impact resistance, titanium alloys have been widely used in shipbuilding.
The titanium alloys of Russian ships are used in pumps, filters, supply pipes, fire extinguishing systems, pressure vessels and other equipment; the Timetal5111 developed by the U.S. Navy and Timet of the United States has good fracture toughness and anti-stress corrosion resistance, as well as good temperature, creep property and easy to weld. These high-performance titanium alloys are used in the marine systems, cooling systems, sewage treatment systems, electrical components and other equipment of American ships.
Titanium alloys have been widely used in surgical implants currently. The representative titanium alloy Ti-12Mo-6Zr- 2Fe is a kind of metastable alloy, which is suitable for orthopedic devices due to its high strength and fracture toughness, abrasion resistance, corrosion resistance and elastic modulus. The mechanical properties, corrosion resistance and biocompatibility of titanium alloys can be improved by using alloy elements such as zirconium, palladium, niobium, tin, and tantalum, which is the main way to develop the bio-titanium alloy.
The lightweight vehicle is one of the most promising markets for titanium. Titanium alloys are mainly used in automotive engine parts, such as connecting rod, spring, crankshaft, fasteners, etc.