Nickel and titanium alloy
Supplier — AvekGlob company offers to purchase at affordable prices from the manufacturer various rolling profiles, which are made of titanium and nickel alloys. The supplier guarantees prompt delivery of products to any address specified by the customer.
The intermetallic equiatomic binary Ni-Ti alloy forms the structural basis of such alloys. It has a moderate range of solubility, allowing changes in composition and doping by other elements to change shape memory and mechanical properties.
It displays the general behavior of the shape memory, returning to its original form after heating to the temperature of its phase transformation. When heated to this temperature, the alloy goes from a low-temperature monoclinic martensitic structure to a high-temperature cubic austenite structure.
Urgency of application
Due to the following properties of the alloy:
• Creating significant effort due to shape memory effect;
• Excellent damping properties, manifested below the temperature of the structural transition;
• Excellent corrosion resistance;
• High fatigue strength;
• Moderate resistance to shock loads;
• Moderate heat resistance;
These properties stipulate the practical use of titanium and nickel alloys for the production of the following products: fittings and couplings for military aircraft and naval vessels, tweezers for removal of foreign objects with small incisions, anchors for fixing tendons and stents used in cardiovascular surgery. In dentistry, nickel and titanium alloys are used for making orthodontological wires. Industrial applications — Safety valves / actuators for monitoring the temperature of water and fire sprinklers, vibration monitoring devices, fasteners, interconnecting clamping devices, antennas for household phones.
The most known of nickel and titanium alloys is titanium nickelide (nitinol), which contains 45% of titanium and 55% of nickel.
Physical and mechanical properties
Density, kg / m 3 — 6500;
Melting point, 0 С — 1310;
Coefficient of thermal conductivity, W / mdg — 18;
Modulus of elasticity, GPa — 40/75;
The limit of temporary resistance, MPa — 800… 820;
Yield strength, MPa — 440… 500;
Hardness in Brinell, HB, not more than — 320;
Impact strength, kJ / m 2 — 330… 590;
Relative elongation at tension,% — 10.
Technological features of material application
Two methods of primary smelting are used to produce nitinol:
Vacuum arc remelting: in this method, an electric arc is excited between a copper plate that is cooled by water and the original components. The copper mold is used to melt components in a high vacuum to prevent carbon from entering the alloy;
Vacuum induction melting: the raw material is heated in a carbon crucible using an alternating magnetic field. The process is also performed in a high vacuum; However, in this case carbon is introduced into the volume.
Less common are induction or plasma-arc melting, as well as electron-beam melting.
Supplier — AvekGlob Company — offers to purchase different types of rolled products, which are made of titanium-nickel nitinol alloy, at a price formed on the basis of European and world standards of production. Buy these products can be wholesale and retail. For regular customers, there is a flexible system of discounts.