About Titanium Alloys
Aerodyne Alloys is an international supplier of Titanium alloys. We have sales staff and processing staff experienced with the sales, distribution and processing of Titanium alloys. The following provides an overview of Titanium alloys.
Titanium is lightweight, strong, corrosion resistant and abundant in nature. Titanium and its alloys possess tensile strengths from 30,000 psi to 200,000 psi (210-1380 MPa), which are equivalent to those strengths found in most of alloy steels. The density of titanium is only 56 percent that of steel, and its corrosion resistance compares well with that of platinum. Of all the elements in the earth’s crust, titanium is the ninth most plentiful. Titanium has a high melting point of 3135°F (1725°C). This melting point is approximately 400°F (220°C) above the melting point of steel and approximately 2000°F (1100°C) above that of aluminum.
- Corrosion resistant
- Abundant in nature
Titanium has the following advantages:
- Good strength
- Resistance to erosion and erosion-corrosion
- Very thin, conductive oxide surface film
- Hard, smooth surface that limits adhesion of foreign materials
- Surface promotes drop wise condensation
Industries Using Titanium & Applications of Titanium
The aerospace industry is the single largest market for titanium products because of its exceptional strength to weight ratio, high temperature performance and corrosion resistance.The use of titanium has expanded in recent years to include applications in nuclear power plants, food processing plants, oil refinery heat exchangers, marine components and medical protheses.
As aircraft engine manufactures seek to use cast titanium at high temperatures, Ti-6Al-2Sn-4Zr-2Mo and Ti-6Al-2Sn-4Zr-6Mo are being specified more frequently. Other advanced high-temperature titanium alloys for service up to 595oC, such as Ti-1100 and IMI-834 are being developed as castings.
The wrought product forms of titanium and titanium alloys, which include forgings and typical mill products, constitute more than 70% of the market in titanium and titanium alloy production. The wrought products are the most readily available product form of titanium-base materials, although cast and powder metallurgy (P/M) products are also available for applications that require complex shapes or the use of P/M techniques to obtain microstructures not achievable by conventional ingot metallurgy.
Powder metallurgy of titanium has not gained wide acceptance and is restricted to space and missile applications. The primary reasons for using titanium alloys are its outstanding corrosion resistance of titanium and its useful combination of low density (4.5 g/cm3) and high strength. The strengths vary from 480 MPa for some grades of commercial titanium to about 1100 MPa for structural titanium alloy products and over 1725 MPa for special forms such as wires and springs.
The high strength and low density of titanium and its alloys have from the first ensured a positive role for the metal in aero-engine and airframe applications. It is difficult to imagine how current levels of performance, engine power to weight ratios; airframe strength; aircraft speed and range and other critical factors could be achieved without titanium.
Titanium applications are most significant in jet engine and airframe components that are subject to temperatures up to 1100° F. Titanium alloys capable of operating at temperatures from sub zero to 600°C are used in engines for discs, blades, shafts and casings from the front fan to the last stage of the high pressure compressor, and at the rear end of the engine for lightly loaded fabrications such as plug and nozzle assemblies.
Alloys with strength up to 1200 MPa are used in a wide variety of aerospace airframes applications from small fasteners weighing a few grams to landing gear trucks and large wing beams weighing up to 1 ton. Currently titanium makes up close to 10% of the empty weight of aircraft such as the Boeing 777.
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