Let’s read more professional words explanation of nitinol smart material
- Austenite- the high temperature parent phase of the Nitinol alloy having a B2 crystal structure;
- Austenite finish temperature (Af)-the temperature at which martensite (or R-phase) to austenite，transformation is completed on heating of the alloy;
- Austenite start temperature (As)- Austenite start temperature (As);
- Free recovery- unconstrained motion of a shape memory alloy upon heating and transformation to austenite after deformation in a lower temperature phase;
- Superelasticity- nonlinear recoverable deformation behavior of Nitinol shape memory alloys that occurs at temperatures above Af but below Md;
- Heat treatment- The correct annealing and shape setting steps are required to introduce the effect, with vacuum furnaces guarantees the finest grain sizes for annealed nitinol with excellent break elongations and fatigue life results;
- Memory wire- The metal wire “remembers” a different shape when it gets hot. Dunking it in hot water generates kinetic energy, as this little kit impressively shows;
- Drawing process- we have been able to develop a drawing process that avoids the need for slurry cleaning, chemical cleaning or mechanical removal operations on the inner surface of the drawn tube.Our process allows us to attain a roughness value of Ra 0,1 µm;
- One-way and Two-way memory- One-way elements only remember a high temperature shape to which they return upon heating. On the other hand, two-way elements remember the high temperature shape upon heating and the low temperature shape upon cooling. A two-way behavior can also be achieved by combining a one-way element with a counterforce. This reversible change of shape, with the aid of an external counter force provides a self-sustaining solution;
