Targeted Alternation in Properties of Solid Amorphous-Nanocrystalline Material in Exposing to Nanosecond Laser Radiation

Abstract

One of the most important purposes of materials science is the ability to govern the physical properties of materials characterized by different structures. The strength properties of nanostructured metal alloys do not always meet the exploitation requirements. The set of properties of such materials is stable within narrow limits: temperature, mechanical, and corrosion conditions. Traditional processing modes are ineffective for such materials. Attempts to use them often lead to the loss of unique physical and chemical properties. The most effective methods of processing such materials are associated with the use of laser radiation. The laser pulse has a number of features, including a complex effect on the surface layers of the material. Spot and short irradiation with high-energy rays can preserve the unique physical properties of samples as a whole and improve strength indicators without destroying the structure of the material as a whole.

Physical Mechanism of Selective Healing of Nanopores in Condensed Matter under the Influence of Laser Irradiation and Plasma

“…A significant change in the mechanical properties after selective laser treatment was observed in a surface layer with a thickness of 0.5–1 mkm [ 2 , 13 , 23 ]. Consequently, the sizes of the pores and the sizes of the pore system were chosen so that they were located in a layer with a thickness of less than 1 mkm.…”

“…Multicomponent amorphous and amorphous–nanocrystalline metallic alloys were used. For opaque materials, the selectivity of laser treatment can be realized in a thin surface layer [ 13 ].…”

“…As a result of the selective effect of short-pulse laser irradiation on the defective areas of nanocrystalline metal alloys, the effects of simultaneous increases in microhardness and plastic characteristics were found. In the works of [ 2 , 13 , 14 , 23 ], significant increases in the hardness (nano- and microhardness) and plastic characteristics associated with the resistance of the surface to crack formation under intense local loading of the diamond pyramid have been determined. The local increase in the strength characteristics of the material was qualitatively explained on the basis of ideas about the possibility of laser healing of defects such as pores and microcracks.…”

Optimization and modeling of electric generators elements of wind power plants

“…One of the most important features is that the generator is driven by a wind wheel, the speed mode of which depends on the wind speed and is unstable. For variable loads, it is better to use materials with high fracture toughness [8][9][10][15][16][17][18].…”

“…Raising the efficiency of wind power plants is a complex task not only of electromechanics. A comprehensive approach is needed in the field of mechanical engineering, metallurgy and modern nanotechnologies for obtaining and processing materials [13][14][15][16][17][18]. The use of new alloys [6][7][8][9][10][18][19] is important not only in the design, but also in the electrical part, for example, in generators.…”