Common forms a stable element in titanium and titanium bar in

The main elements of a stable aluminum , gallium , germanium, lanthanum , cerium, neodymium and oxygen , carbon, nitrogen, boron , etc. Recently, some people think scandium and hafnium may also fall into this category . In the industrial application of the most widely used titanium alloy a stable element is aluminum. In recent years, in the development of nearly a gallium -based superalloy CKS growing importance titanium standard parts. Therefore , there will be described focusing on the role of aluminum and gallium .

1 Ti - Al binary system
The maximum solubility of aluminum in β titanium appeared in 1460 ℃, about 30%. The maximum solubility of aluminum in a titanium appeared in 1080 ℃, about a 11%, 550 ℃ , the solubility of aluminum in a titanium is about 7.5%. There will be two compounds , r phase and a2 -phase general phase diagram . r is an ordered phase based compound TiAL , with a face -centered tetragonal ( almost tetragonal ) lattice ; a = 4.005 Å , c = 4.073 Å , c / a = 1.0162. a2 -phase compound is an ordered group of Ti2AL having a hexagonal lattice , a = 5.8730 Å , c = 4.6543 Å , c / a = 0.8047. a2 phase transition phase can come from the β.

2 titanium - gallium
Titanium - Titanium binary gallium , gallium β titanium solution temperature maximum occurs at about 1500 ℃, approximately 38% (30 atomic% ) . Gallium in a maximum solid titanium in 940 ℃ about 17% (13 atomic% ) . Solubility decreases as the temperature decreases . General a2 phase is the phase diagram for the orderly phase -based Ti3Ga titanium whole distributor.