The investigation results of the repeated irradiation impact of silver nano-particles upon their dimensions are shown. In particular, the attention is paid to the particles with dimensions from 10 to 40nm. As a result of the researches there were defined the regularities in dimension changes of particles at different degrees of irradiation. These results may be used for the development of strategies in nano-particle dimension control, which is significant for the laser synthesis method from the point of view of its competitive ability with chemical methods.

The paper deals with the development of a new hybrid technology – 3D laser work hardening which consists in the integration of laser shock treatment (laser work hardening) into the process of selective laser melting. The technology offered will allow obtaining an area of compressing residual stresses in a near surface layer and achieving the improvement of mechanical and fatigue properties of parts manufactured. In this paper the aluminum alloy samples were processed with laser work hardening with the use of uncommon absorbing and transparent layers (foil and glass) which are necessary for the introduction selective laser melting in a plant. Modes of laser work hardening were also investigated which may be used in the hybrid technology offered.

In this paper the application of laser cutting methods for polymeric materials working is under consideration. The authors analyze the laser beam effect upon polymers reasoning from the peculiarities of their structure and properties. The methods to eliminate defects at polymer laser cutting, the methods to increase the interaction effectiveness of radiation with material, process quality are offered. To determine the dependences of a cut width and a value of flash formed at the beam input and its output of material worked there were carried out experiments at different rates and constant capacity of CO2-laser. According the results of the researches carried out the optimum working modes were established.