Ni-Ti shape memory alloys are extremely interesting materials both
for their ability of showing the shape memory
effect (SME) and for their elevated strength and ductility.
Shape memory alloys do exactly as their name would suggest; they're
metallic materials that are able to remember,
and return to, their original shape (the shape they are given when
made, say as a casting or an extrusion)
under the right stimuli. The principle behind this unusual
phenomenon comes from two diverse atom arrangements
(crystal structures) present in this material - one at high
temperatures and one at low temperatures - that are reversible.
At high temperatures, where one of the crystal structures is
favoured, the material can be shaped as desired and
it retains this geometry as it cools to lower temperatures. Cooled,
the material can be bent and twisted beyond
all recognition of its previous guise but, on heating, the low
temperature atomic arrangement reverts to its previous form
and, in so doing, miraculously returns to its previous shape.
1.Low Density and High Strength
2.Excellent Corrosion Resistance
3.Good resistance to effect of heat
4.Excellent Bearing to cryogenic property
5.Nonmagnetic and Non-toxic
6.Good thermal properties
Applications:
Helicopter blades: Performance for helicopter blades depend on vibrations; with memory
metals in
micro processing control tabs for the trailing ends of the blades,
pilots can fly with increased precision.
Eyeglass Frames: In certain commercials, eyeglass companies
demonstrate eyeglass frames that can be bent back
and forth, and retain their shape. These frames are made from
memory metals as well, and demonstrate super-elasticity.
Tubes, Wires, and Ribbons: For many applications that deal with a heated fluid flowing through
tubes, or wire
and ribbon applications where it is crucial for the alloys to
maintain their shape in the midst of a heated environment,
memory metals are ideal.
Fire security and Protection systems: Lines that carry highly flammable and toxic fluids and gases must
have a great
amount of control to prevent catastrophic events. Systems can be
programmed with memory metals to immediately
shut down in the presence of increased heat. This can greatly
decrease devastating problems in industries that
involve petrochemicals, semiconductors, pharmaceuticals, and large
oil and gas boilers.
Anti-scalding protection: Temperature selection and control system for baths and showers.
Memory metals can be designed to restrict water flow by reacting at
different temperatures,
which is important to prevent scalding. Memory metals will also let
the water flow resume
when it has cooled down to a certain temperature
Dental wires: used for braces and dental arch wires, memory alloys
maintain their shape
since they are at a constant temperature, and because of the super
elasticity of the memory metal,
the wires retain their original shape after stress has been applied
and removed.Welcome contact for OEM service . 
