Shape memory alloys made more efficient

Scientists from the National Research Technological University MISiS have improved the technology

obtaining medical alloys with shape memory.

Shape memory alloys (SMA) - materialscapable of restoring their shape after severe deformations. The most widely used intermetallic SPFs based on Ti-Ni are used in implants and smart medical devices with high reliability requirements, such as self-removable surgical staples or vascular stents.

Unlike conventional alloys, high-entropyconsist of five or more elements taken in equiatomic or equimolar concentrations. This arrangement allows for the production of materials with special functional characteristics.

By adding nanoparticles, it was possible to obtain a reversible deformation of up to 13.5%. The maximum calculated deformation life, which materials scientists around the world strive for, is 8.7%. 

During the study, university scientists for the first time receiveddeformation diagrams and studied the formation of the SMA structure at temperatures below 600 ° C, which are most promising for the formation of nanostructures. According to experts, the analysis of the data obtained also made it possible to determine the temperature ranges of the dynamic processes of recovery, polygonization and recrystallization of the SPF.

Read more

Abortion and science: what will happen to the children who will give birth

A third of those who have recovered from COVID-19 return to the hospital. Every eighth - dies

Named a plant that is not afraid of climate change. It feeds a billion people