They improve the manufacture of high specialty prostheses | Digital Trends Spanish



Shape memory alloys are metallic fusions with the ability to deform under heat and return to its original shape upon cooling. They are used in highly specialized surgical equipment or as non-invasive prostheses. But that effect, known as shape memory, requires very high temperatures, between 800 and 900 degrees Celsius.

Now, a team of Russian scientists claim to have found a new technique to achieve the shape memory effect at much lower temperatures, at a minimum of 300 and a maximum of 600 degrees Celsius.

Specifically, researchers from the National University of Science and Technology of Russia (NUST MISIS, for its acronym in English and Russian) explain in a study published in the magazine JOM, that it is possible to achieve deformation in nickel and titanium alloys, known as nitinol, at lower temperatures forming what is called “an ultra microgranulated structure”, which facilitates the malleability of the material when heated.

In their study, they describe what the parameters should be for the thermomechanical treatment of nitinol. In addition, experts assure that this advance allows not only to form alloys at lower temperatures, but also to manufacture larger and safer parts.

Shape memory alloys are currently used in many non-invasive surgical devices, for example, tubular prostheses that restore flow capacity in body ducts affected by narrowing. Another of the most common applications is in dental surgery, since nitinol prostheses, by regaining their strength, can apply pressure to the patient’s teeth.

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