Russian scientists from the laboratory of physics of high-strength crystals of the Siberian Physical-Technical Institute (SFTI) of the Tomsk State University (TSU) have developed a new alloy of a metal with improved shape memory.

“According to the functional characteristics, the new alloy surpasses titanium nickelide – the leader among materials capable of restoring its shape when heated after high external loads. The development is promising for creating innovative solutions in the aviation, aerospace, automotive industries and robotics,” the report said.

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The alloy was developed on the basis of iron, nickel, cobalt and aluminum with a replaceable fifth element – it can be titanium, niobium, and their combination.

According to the engineer of the laboratory of physics of high-strength crystals of SFTI TSU Anna Eftifeyeva, the new material based on iron has a greater ability than that of titanium nickelide to recover from deformation.

“The new iron-based alloy reversible shape change reaches 15%, for nickel-titanium alloys – about 10%. Due to this, the sensors and actuators of iron-based alloys will work more efficiently, as well as the mechanisms that they set in motion”, – explained Eftifeev.

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This result was achieved with the help of special heat treatment; scientists have already received a patent for the technology.

Scientists also managed to achieve the high strength of the new alloy, which is an important aspect for practical application in the aerospace and machine-building industries.

In addition, it is noted that sensors and actuators made of a new iron-based alloy will not only be stronger but also cheaper than titanium nickelide products.

Translated in English from Tomsk State University

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