Characteristics of Nitinol Shape Memory Alloy

Nitinol shape memory alloy is a certain shape when the mother phase after cooling to a temperature above the Af temperature below the Mf formation of martensite, the martensite temperature below Mf deformation, heated to a temperature below Af, with reverse transformation, Materials will automatically recover its shape when the parent phase. In fact the shape memory effect is a nickel-titanium alloy by thermally induced phase transformation. Superelastic: so-called super-elastic means generating the sample is much larger than the elastic limit strain from the strain of the external force, strain phenomenon can be automatically restored when uninstalling. That is in parent phase state, due to the applied stress, leading to stress-induced martensitic transformation occurs, thereby alloy exhibits different from ordinary mechanical behavior of materials, its elastic limit is far greater than ordinary materials, and no longer comply with Hooke's law. Corrosion Resistance: Studies have shown that nickel-titanium wire corrosion resistance similar to stainless steel wire.
Anti-toxicity: Nitinol shape memory alloy special chemical composition that this is a nickel titanium atom alloys, nickel containing about 50%, while the nickel is known to have carcinogenic and tumor promotion. In general, the surface titanium oxide layer acts as a barrier, so that Ni-Ti alloy with good biocompatibility.