Except the metal components, there are many carbon fiber composite materials both in aircraft and spacecraft.
The electrode potential of titanium and carbon fiber composites is similar, and titanium alloy is the only connection material of composite materials.With the increasing of titanium alloy and composite materials for military and civilian aircraft, the demand of titanium fasteners is increasing day by day.
There are four advantages of titanium alloy used as aviation fasteners, please check below.
1) Good effect of weight reduction. An aircraft of II-96 in Russia uses 142,000 fasteners, which reduce the weight by nearly 600kgs.In China, the titanium alloy fasteners used in aerospace system also has the obvious weight reduction. After the aircraft and spacecraft reducing the weight, it will improve the thrust, increase the firing range, save fuel and reduce the launch cost.
2) The excellent corrosion resistance of titanium alloy, especially its positive potential matching with carbon fiber composite materials, these will effectively prevent the occurrence of galvanic corrosion of fasteners.
3) In the aircraft structure, the fasteners part can not use aluminum alloy because of the high temperature, only titanium alloy can be used.
4) Titanium has good elasticity and non-magnetic, which is important to prevent the fastening bolts loosing and anti-magnetic field interference.
Modern aircraft use a variety of titanium alloy fasteners, mainly as ordinary titanium bolts, interference bolts, special fasteners and so on.