Joining

Welding: For joining nitinol components, laser, plasma and resistant welding processes are usually utilized in nitinol manufacture. A common require in the welding process is that a large amount of heat is needed to create the joint [2].

Laser: CNC pulsed laser system has the advantages of high speed, non-constant and low heat.
Plasma: Plasma welding is an arc welding process for forming atraumatic balls on the ends of nitinol tubes or wires (Figure.3).

Figure 3. A sample of plasma ball.

Resistance welding: Higher electrical resistance at the faying surface produce more heat and mechanical load to form a weld nugget or a fusion zone [2]. Normally be utilized to butt welding the large nitinol components.

Crimping: Crimping is typical choice when the termination of Nitinol wires or tubes ends need to be welded (Figure.4).

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Figure 4. A crimping process samples.

Soldering and adhesives: A ideal method of joining nitinol to dissimilar materials. UV and heat curable are available options for adhesives [2]. However, soldering and adhesive are not good choice for implantable medical device.

Nitinol

Nitinol

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