Nitinol (NiTi) (NiTi)
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Basic Properties
| Alloy Type | |
|---|---|
| Designation | NiTi |
| Density | 6.45 g/cm³ |
| Melting Point | 1310°C |
Composition
| Element | Percentage |
|---|
Description
Shape memory alloy with unique properties of superelasticity and shape memory effect.
| Density | 6.45 g/cm³ |
|---|---|
| Electrical Resistivity | 82 μΩ·cm |
| Tensile Strength | 895-1900 MPa |
|---|---|
| Yield Strength | 195-690 MPa |
| Elongation | 1-60% |
| Hardness | 200-600 HV |
| Machinability | Poor - very difficult to machine, work hardens rapidly |
| Melting Point | 1310°C |
|---|---|
| Thermal Conductivity | 18 W/(m·K) |
| Thermal Expansion | 6.6-11.0 μm/(m·K) |
| Heat Treatment | Shape setting at 400-500°C, aging treatments for property modification |
| Heat Treatment | Shape setting at 400-500°C, aging treatments for property modification |
|---|---|
| Corrosion Resistance | Excellent - superior corrosion and biocompatibility for medical applications |
Applications
Medical implants, stents, orthodontic wires, actuators, couplings, eyeglass frames
History
Discovered in 1960s at Naval Ordnance Laboratory, revolutionized smart materials.