The invention provides a laser shock processing method for small-hole component with different thickness. In this method, different process parameters are adopted for laser shock processing of small hole members with different thicknesses, and the empirical formula was obtained by statistical analysis of the experimental results, and the empirical formula $I_0=A{e}^{\frac{t}{B}}\frac{{\sigma }_s^2}{Z}$
is the relationship between power density and thickness of small hole members. According to this formula, the power density of laser shock strengthening of orifice member with different thickness is determined, and the selection and determination method of process parameters related to this is put forward. According to this method, reasonable residual compressive stress distribution can be obtained after laser shock strengthening with appropriate technology, and good strengthening effect can be achieved.

An apparatus may include a diode-pumped solid-state laser oscillator configured to output a pulsed laser beam, a modulator configured to modify an energy and a temporal profile of the pulsed laser beam, and an amplifier configured to amplify an energy of the pulse laser beam. A modified and amplified beam to laser peen a target part may have an energy of about 5J to about 10 J, an average power (defined as energy (J) x frequency (Hz)) of from about 25 W to about 200 W, with a flattop beam uniformity of less than about 0.2. The diode-pumped solid-state oscillator may be configured to output a beam having both a single longitudinal mode and a single transverse mode, and to produce and output beams at a frequency of about 20 Hz.

A soft magnetic alloy ribbon is made of a Fe-based soft magnetic alloy and includes a first laser peening trace row and a second laser peening trace row each of which includes a plurality of laser peening traces in a row in a first direction and which are arranged adjacent to each other in a second direction intersecting the first direction, and a domain wall extending in a third direction, in which D0<D1 where a straight line at an equal separation distance from the first laser peening trace row and the second laser peening trace row is defined as a central line, a straight line which has a first distance where a distance from the first laser peening trace row is shorter than the separation distance is defined as a first reference line, a width of the domain wall at a position intersecting the central line is defined as D0, and a width of the domain wall at a position intersecting the first reference line is defined as D1.

A processed product manufacturing method includes preparing a workpiece containing metal and forming a plurality of first regions and a second region along a surface of the workpiece by the irradiation of a laser beam. The first regions are applied with a tensile residual stress. In the second region applied with a compressive residual stress, a plurality of irradiation points separated from each other in the surface of the workpiece are irradiated with the laser beam. The first regions are formed to be separated from each other and each of the first regions is surrounded by the second region when viewed from a direction orthogonal to the surface.

Methods, systems, and apparatus, for hybrid additive manufacturing of parts. In one aspect, a method includes providing a workpiece and manufacturing multiple additive layers on a surface of the workpiece. Manufacturing each of the multiple additive layers includes forming one or more formed layers on a surface of the workpiece by depositing a quantity of powder material on a growth surface, the growth surface inclusive of at least one of a first surface of the workpiece and a second surface of a previously formed layer, and applying a first amount of energy to the quantity of powder material to fuse the particles of the powder material into a formed layer fused to the growth surface, where the formed layer includes a formed surface, and further applying a secondary process to a particular area of the formed surface of the one or more formed layers on the workpiece.

Methods, systems, and apparatus, for hybrid additive manufacturing of parts. In one aspect, a method includes providing a workpiece and manufacturing multiple additive layers on a surface of the workpiece. Manufacturing each of the multiple additive layers includes forming one or more formed layers on a surface of the workpiece by depositing a quantity of powder material on a growth surface, the growth surface inclusive of at least one of a first surface of the workpiece and a second surface of a previously formed layer, and applying a first amount of energy to the quantity of powder material to fuse the particles of the powder material into a formed layer fused to the growth surface, where the formed layer includes a formed surface, and further applying a secondary process to a particular area of the formed surface of the one or more formed layers on the workpiece.

To form linear grooves of desired groove width on a metal strip surface and provide a grain-oriented electrical steel sheet having excellent magnetic properties, a linear groove formation method comprises: forming a resist coating on at least one surface of a metal strip; thereafter irradiating the resist coating with a laser while scanning the laser in a direction crossing a rolling direction of the metal strip, to remove the resist coating in a part irradiated with the laser; and thereafter performing etching treatment to form a linear groove in a part of the metal strip in which the resist coating is removed, wherein the resist coating contains a predetermined amount of an inorganic compound, and on the surface of the metal strip, the laser has a predetermined elliptic beam shape.

A grain-oriented electrical steel sheet according to the present invention has a steel sheet surface provided with grooves. An average protrusion height of the surface protrusion extending along a longitudinal direction of the groove is more than 5 μm and not more than 10 μm. When the surface protrusion is viewed in a cross section including the longitudinal direction of the groove and a normal direction of the steel sheet surface, the surface protrusion includes specific portions each having a height of 50% or more with respect to a height of each peak point appearing on a profile line of the surface protrusion. In the longitudinal direction of the groove, the total length of the specific portions is a length of 30% or more with respect to an overall length of the surface protrusion.

The present invention provides a device for peening by coupling a laser shock wave and an ultrasonic shock wave in real time. The device includes a synchronization device, a laser device, two ultrasonic shock devices, a working platform and a control system. An upper casing is supported above a base through second hydraulic cylinders. Two supporting beams are provided under the upper casing through the second hydraulic cylinders. Limiting slide rails are provided under the upper casing through first hydraulic cylinders. The two ultrasonic shock devices are connected through the synchronization device, which is configured to synchronize movement and rotation of the two ultrasonic shock devices. The laser device is configured to generate a laser beam to pass through the upper casing and irradiate a surface of a workpiece. The control system controls the laser device to lag behind the two ultrasonic shock devices to perform laser shock.

In a cryogenic workbench, a cryogenic laser peening system and a control method, a tapered surface gap d is adjusted, based on the electromagnetic principle, to control the gasification volume of liquid nitrogen, then the temperatures of the copious cooling workbench and the surface of a sample are precisely controlled by means of the adjustment of the heat absorption amount of liquid nitrogen gasification, the temperature adjustment range and the temperature rising/lowering rate of the cryogenic laser peening system are effectively extended, and the precision of the control of the surface temperature of the sample is increased in combination with a closed-loop control. Additionally, an intelligent control of a cryogenic laser peening process is realized by means of a computer and a PLC control unit, whereby the usage amount of liquid nitrogen in the experiment process is reduced and the processing efficiency is improved.