Titanium alloy has the characteristics of good ductility, toughness and corrosion resistance, so titanium alloy is widely used in aerospace and other fields that require high mechanical properties and lightweight and corrosion resistance. By adding high content of niobium to titanium alloy, the solid solution treatment can make the titanium alloy maintain the body-centered cubic structure at room temperature, which further improves the shaping of this titanium alloy. Because this kind of titanium alloy with body-centered cubic structure is not stable and can undergo phase transformation under the action of plastic deformation, it can have super elasticity and shape memory effect. The addition of niobium reduced the elastic modulus of titanium alloy and further improved the corrosion resistance. This low modulus titanium alloy has a certain elastic deformation capacity, so it has a certain shape adaptive performance, in the fine parts with higher precision requirements, using it as fasteners, not only to prevent loosening, but also to reduce damage. In addition, when the elastic modulus of this titanium alloy is close to human bone, bone absorption caused by stress shielding can be effectively avoided.
In order to study the properties of titanium alloys, it is necessary to display and observe the microstructure of titanium alloys to determine their fine microstructure, thus laying a foundation for improving the properties of titanium alloys. Because the corrosion resistance of high titanium niobium alloy is strong, the corrosion time is very long and the effect is not good. In addition, although some patented etchants can also be used to corrode high tibium-niobium alloys, the contrast is often small, and the image is always hazy, and does not display well for very fine parts. This problem of small contrast often cannot be ameliorated by a single change in the composition of the etchant.
