Scientists learn how to control the formation of nanoscale voids in metal alloys

The results saw light in Journal of Non-Crystalline Solids.

Scientists from the Department of Computational Physics and Modeling of Physical Processes have conducted a detailed study of the mechanisms of nucleation of nanoscale voids in amorphous metal alloys under conditions of external negative pressure, in which the material undergoes comprehensive expansion.

The study was carried out using the example of binary metal alloys Cu64.5Zr35.5 and Ni62Nb38, which belong to the class of materials capable of forming bulk metallic glasses.

"Studying the initial stages of the process of material destruction is an important task for both fundamental and applied science. Currently, there is no generally accepted theory describing the initial stages of the formation of destruction foci. We have obtained completely new results that shed light on how destruction foci originate," explains Department Chair Anatolii Mokshin..

"From a practical point of view, the results can be used in the development of methods to control or prevent the formation of cracks in materials. This, in turn, contributes to the development of such a promising area as the development of materials capable of 'self-healing' cracks under certain environmental conditions. Such materials have increased resistance to fatigue and can significantly extend the service life of products," adds Associate Professor Bulat Galimzyanov.

The publication contributes to the understanding of the general patterns of fracture formation, which allows for the development of a unified theoretical description of the processes of cavity (crack) formation in amorphous materials.

The work was carried out as part of the project "Development of a methodology for determining the physical and mechanical properties of materials based on machine learning models", supported by a grant from the Academy of Sciences of the Republic of Tatarstan.

More information:
Mechanism of void formation in high-density supercooled melts and amorphous alloys at negative external pressure
www.sciencedirect.com/science/ … 0022309325002200?via%3Dihub

Provided by Kazan Federal University