The Advantages And Disadvantages Of Titanium Alloy

Titanium alloy is an alloy based on titanium and composed of other elements. There are two kinds of homogenous heterocrystals of titanium: close-packed hexagonal α titanium below 882℃, and body-centered cubic β titanium above 882℃. The alloying elements can be divided into three categories according to their effects on the phase transition temperature: ① The elements that stabilize the α phase and increase the phase transition temperature are the α stable elements, including aluminum, carbon, oxygen and nitrogen. Aluminum is the main alloying element of titanium alloy, which has obvious effect on improving the strength of alloy at room temperature and high temperature, reducing specific gravity and increasing elastic modulus. ② The elements that stabilize β phase and reduce the temperature of phase transformation are β stable elements, which can be divided into two types: isocrystalline type and eutectic type. The former has molybdenum, niobium, vanadium and so on; The latter has chromium, manganese, copper, iron, silicon and so on. ③ The elements that have little effect on the temperature of phase transition are neutral elements, such as zirconium and tin.

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