The present invention relates to a method for improving service life of mesoscopic gear manufactured by an additive manufacturing method. The outer diameter of the mesoscopic gear is characterized by range from 1 mm to 10 mm. The method according to the present invention provides introduction of compressive residual stress below the surface of the gear while the mesoscopic geometry remains the same. The second aspect of the present invention relates to the product manufactured by the method according to the present invention.

The present invention relates to a method for improving service life of mesoscopic gear manufactured by an additive manufacturing method. The outer diameter of the mesoscopic gear is characterized by range from 1 mm to 10 mm. The method according to the present invention provides introduction of compressive residual stress below the surface of the gear while the mesoscopic geometry remains the same. The second aspect of the present invention relates to the product manufactured by the method according to the present invention.

A laser processing apparatus includes a holding unit having a holding table holding a plate-shaped workpiece, a laser beam applying unit applying a pulsed laser beam to the workpiece held on the holding table to thereby process the workpiece, and a liquid supply mechanism supplying a liquid to the workpiece held on the holding table to provide a condition where the workpiece is immersed in the liquid. The liquid supply mechanism includes a chamber having a transparent plate located above the holding table with a spacing defined between the lower surface of the transparent plate and the upper surface of the workpiece held on the holding table, the chamber being held on the upper surface of the holding unit to define an enclosed space.

A system includes an energy source, a focusing system, and a controller. The energy source is configured to output energy pulses to the focusing system. A chamber surrounds at least a portion of a metallic substrate and contain a liquid in contact with a surface of the metallic substrate. The controller is configured to cause the energy source to output energy pulses and cause the focusing system to focus a focal volume of the energy pulses at or near the surface of the metallic substrate that is in contact with the liquid to create micro-scale or smaller surface texturing on the metallic substrate.

A system includes an energy source, a focusing system, and a controller. The energy source is configured to output energy pulses to the focusing system. A chamber surrounds at least a portion of a metallic substrate and contain a liquid in contact with a surface of the metallic substrate. The controller is configured to cause the energy source to output energy pulses and cause the focusing system to focus a focal volume of the energy pulses at or near the surface of the metallic substrate that is in contact with the liquid to create micro-scale or smaller surface texturing on the metallic substrate.

Provided is a method of synthesizing apatite powder by emitting a laser beam to a surface of a substrate immersed in a precursor solution. The method is including immersing a substrate in an apatite-forming precursor solution, emitting a laser beam to a region on a surface of the substrate immersed in the precursor solution, and obtaining apatite powder generated in the precursor solution.

Provided is a method of synthesizing apatite powder by emitting a laser beam to a surface of a substrate immersed in a precursor solution. The method is including immersing a substrate in an apatite-forming precursor solution, emitting a laser beam to a region on a surface of the substrate immersed in the precursor solution, and obtaining apatite powder generated in the precursor solution.

A method for processing a transparent workpiece includes applying a fluid film having a first refractive index to a impingement surface of the transparent workpiece that has a second refractive index. Further, a difference between the first refractive index and the second refractive index is about 0.8 or less and the impingement surface comprises a surface roughness Ra of about 0.1 m or greater. The method also includes forming a defect in the transparent workpiece by directing a laser beam oriented along a beam pathway and output by a beam source, through the fluid film, through the impingement surface, and into the transparent workpiece such that a portion of the laser beam directed into the transparent workpiece generates an induced absorption within the transparent workpiece, the induced absorption producing the defect within the transparent workpiece.

In some examples, a system includes an energy source, a focusing system, and a controller. The energy source is configured to output energy pulses to the focusing system. A chamber may surround at least a portion of a metallic substrate and contain a liquid in contact with a surface of the metallic substrate. The controller may be configured to cause the energy source to output energy pulses and cause the focusing system to focus a focal volume of the energy pulses at or near the surface of the metallic substrate that is in contact with the liquid to create micro-scale or smaller surface texturing on the metallic substrate.

A method and device for strengthening the laser shock of a hidden surface includes establishing a continuous laser shock strengthening track and process after acquiring the information about the whole hidden surface. A control system adjusts the movement and rotation of a total reflection mirror which is arranged in a workpiece according to the signal from signal collecting cards for making a reflected laser beam act on a region to be machined of the hidden surface at an appropriate incidence angle. The method can realize the surface strengthening treatment of the hidden surface of the workpiece, significantly improve the mechanical performance of the workpiece and increase the fatigue life thereof, which is applicable to the surface strengthening of the workpiece with the hidden surface.