A method is provided for in-situ laser shock peening of a three-dimensional printed metal part. The method for IS-LSP of a 3D printed metal part may include the steps of: executing by a processor program code stored in a memory to synchronize 3D printing of a metal part and LSP of the metal part, wherein the synchronizing may include: printing by a 3D printing apparatus a metal layer according to dimensions specified in a 3D printing program, wherein the printing of the metal layer includes depositing one of a metal or alloy wire feed and metal or alloy powder and direct melting layer-by-layer the deposited metal or alloy wire feed or the deposited metal or alloy powder using an electric arc or a laser beam.
B29C 64/153 - Procédés de fabrication additive n’utilisant que des matériaux solides utilisant des couches de poudre avec jonction sélective, p. ex. par frittage ou fusion laser sélectif
B22F 3/16 - Compactage et frittage par des opérations successives ou répétées
B23K 26/356 - Travail par rayon laser, p. ex. soudage, découpage ou perçage pour le traitement de surface par traitement par choc
2.
METHOD AND APPARATUS FOR IN-SITU DETECTION OF DAMAGE OCCURRING TO AN OPTICAL FIBER OR AN OPTICAL MIRROR
A detector is provided for in-situ detection of damage to an optical fiber, the detector comprising: a laser light detection circuitry disposed at a terminal end of an optical fiber, the fiber coupled to an operating laser pulse generation system, to perform in-situ detection of damage occurring to the fiber, wherein the circuitry is calibrated to detect an energy level of a portion of optical signals sampled from generated laser pulses propagated in the fiber, wherein the circuitry converts the energy of the detected optical signals into electrical signals for processing to monitor a level of the optical signals to indicate normal operational integrity in the fiber or an occurrence of damage to the fiber according to a change in the energy level of the detected optical signals, and outputs a binary signal to a controller to shut off the system within a defined response time if damage is detected.
A method is provided for laser peening the surface of an oxide- or corrosion-susceptible material, the method comprising: providing the material; applying a flow of a transparent overlay comprising a corrosion inhibitor solution to the surface of the material; and delivering a laser beam through the flow of transparent overlay to the surface of the material. In one aspect, the laser peening induces a residual stress magnitude in the surface of the material at a given depth that is within at least 20% of the residual stress magnitude at a given depth where the transparent overlay consists of water. Systems are provided for carrying out the method. In one aspect, the method is characterized by the absence of a requirement for post-processing steps to the manufacturing process, such as post-treatment with an anti-corrosive, a rust-inhibitor, or a drying station.
C21D 10/00 - Modification des propriétés physiques autrement que par traitement thermique ou déformation
B23K 26/00 - Travail par rayon laser, p. ex. soudage, découpage ou perçage
B64F 5/00 - Tracé, fabrication, assemblage, nettoyage, entretien ou réparation des aéronefs, non prévus ailleursManipulation, transport, test ou inspection de composants d’aéronefs, non prévus ailleurs
G01N 21/95 - Recherche de la présence de criques, de défauts ou de souillures caractérisée par le matériau ou la forme de l'objet à analyser
4.
METHOD AND SYSTEM FOR USE IN LASER SHOCK PEENING AND LASER BOND INSPECTION PROCESS
A laser system includes an integrated fiber laser front-end, configured to generate and output a pre-amplified first pulsed laser beam having predefined beam characteristics corresponding to a user defined pulse shape and a user defined pulse width setting selection of a controller. The first pulsed laser beam is generated from a master oscillator which outputs a CW laser beam to a temporal pulse shaper, which modulates the CW laser beam to output the first pulsed laser beam in response to an electrical pulse from an arbitrary wave generator and a DC bias voltage from an automatic modulator bias control circuitry. The first pulsed laser beam is pre-amplified to an output pulsed laser beam for laser peening or laser bond inspection. A beam detector is used to monitor beam characteristics, and to generate an error signal to be sent back as a feedback signal to the controller for adjustments and corrections.
B23K 26/00 - Travail par rayon laser, p. ex. soudage, découpage ou perçage
B23K 26/06 - Mise en forme du faisceau laser, p. ex. à l’aide de masques ou de foyers multiples
B23K 26/0622 - Mise en forme du faisceau laser, p. ex. à l’aide de masques ou de foyers multiples par commande directe du faisceau laser par impulsions de mise en forme
B23K 26/356 - Travail par rayon laser, p. ex. soudage, découpage ou perçage pour le traitement de surface par traitement par choc
H01S 3/10 - Commande de l'intensité, de la fréquence, de la phase, de la polarisation ou de la direction du rayonnement, p. ex. commutation, ouverture de porte, modulation ou démodulation
An apparatus for directing a laser beam to a workpiece surface includes a housing having a laser beam exit aperture. The apparatus further includes an output optical device configured to emit a converging laser beam. The converging laser beam is centered on an axis and is directed outward from the housing through the exit aperture toward a workpiece surface. A water nozzle outlet is arranged to discharge a stream of overlay water toward the workpiece surface. An air nozzle outlet is arranged to discharge a stream of air in a direction transverse to the axis at a location axially between the water nozzle and the exit aperture.
B23K 26/146 - Travail par rayon laser, p. ex. soudage, découpage ou perçage en utilisant un écoulement de fluide, p. ex. un jet de gaz, associé au faisceau laserBuses à cet effet l'écoulement de fluide contenant un liquide
B23K 26/142 - Travail par rayon laser, p. ex. soudage, découpage ou perçage en utilisant un écoulement de fluide, p. ex. un jet de gaz, associé au faisceau laserBuses à cet effet pour l'enlèvement de résidus
An apparatus is provided, the apparatus comprising: (i) a diode-pumped solid-state laser oscillator configured to generate a pulsed laser beam having predefined beam characteristics corresponding to a current setting selection of a controller; and (ii) an amplifier configured to amplify an energy and modify a beam profile of the pulse laser beam. A beam detector is coupled to the generated beam to monitor a combination of: (i) a beam pulse width; (ii) a beam diameter; and (iii) an energy level, and generates an error signal to be sent back as a feedback signal to the controller. The controller configures the current source to output a correction current to tune the DP SSL oscillator, the wave plate, and the first polarizer to rotate a correction polarization angle and adjust the energy amplification or temporal profile to within a defined performance tolerance.
B23K 26/0622 - Mise en forme du faisceau laser, p. ex. à l’aide de masques ou de foyers multiples par commande directe du faisceau laser par impulsions de mise en forme
A laser system includes an integrated fiber laser front-end, configured to generate and output a pre-amplified first pulsed laser beam having predefined beam characteristics corresponding to a user defined pulse shape and a user defined pulse width setting selection of a controller. The first pulsed laser beam is generated from a master oscillator which outputs a CW laser beam to a temporal pulse shaper, which modulates the CW laser beam to output the first pulsed laser beam in response to an electrical pulse from an arbitrary wave generator and a DC bias voltage from an automatic modulator bias control circuitry. The first pulsed laser beam is pre-amplified to an output pulsed laser beam for laser peening or laser bond inspection. A beam detector is used to monitor beam characteristics, and to generate an error signal to be sent back as a feedback signal to the controller for adjustments and corrections.
B23K 26/06 - Mise en forme du faisceau laser, p. ex. à l’aide de masques ou de foyers multiples
B23K 26/0622 - Mise en forme du faisceau laser, p. ex. à l’aide de masques ou de foyers multiples par commande directe du faisceau laser par impulsions de mise en forme
B23K 26/356 - Travail par rayon laser, p. ex. soudage, découpage ou perçage pour le traitement de surface par traitement par choc
B23K 26/064 - Mise en forme du faisceau laser, p. ex. à l’aide de masques ou de foyers multiples au moyen d'éléments optiques, p. ex. lentilles, miroirs ou prismes
11.
SYSTEMS, METHODS AND APPARATUSES FOR LAUNCHING LASER BEAMS INTO MULTIPLE FIBERS AND/OR COMBINING BEAMS
Systems, methods and device provided for combining or splitting laser beams, including a plurality of optical fibers for providing laser beams, an image relay lens for each of the plurality of optical fibers, positioning a prism beam combiner or splitter after the image relay lenses for combining or splitting the laser beams. According to another aspect, the a prism beam combiner or splitter may include a flattened tip to transmit a portion of an input laser beam, a position sensitive detector to receive the transmitted portion of the input laser beam to track a beam axis motion and provide feedback alignment error signals based on the beam axis motion, and a driver to receive the feedback alignment error signals and to drive a motor or piezo actuated beam steering mirror based on the feedback alignment error signals, wherein a laser bond inspection method implements the described systems and methods.
G01N 19/04 - Mesure de la force d'adhérence entre matériaux, p. ex. du ruban adhésif, d'un revêtement
G02B 6/42 - Couplage de guides de lumière avec des éléments opto-électroniques
G02B 6/08 - Guides de lumièreDétails de structure de dispositions comprenant des guides de lumière et d'autres éléments optiques, p. ex. des moyens de couplage formés par des faisceaux de fibres la position relative des fibres étant la même aux deux extrémités, p. ex. pour transporter des images le faisceau de fibres ayant la forme d'une plaque
A laser shock peening apparatus is provided for use with a workpiece having a cavity. The apparatus includes a tubular body configured for insertion longitudinally inward of the cavity. The tubular body has a peripheral wall bounding a laser delivery channel, and has an aperture reaching outward from the laser delivery channel through the peripheral wall. An optical device is located in the laser delivery channel. The optical device is configured to direct a laser beam outward through the aperture. Additionally, the peripheral wall has internal surfaces defining a water delivery channel configured to convey a stream of overlay water to the aperture.
A laser shock peening apparatus is provided for use with a workpiece having a cavity. The apparatus includes a tubular body configured for insertion longitudinally inward of the cavity. The tubular body has a peripheral wall bounding a laser delivery channel, and has an aperture reaching outward from the laser delivery channel through the peripheral wall. An optical device is located in the laser delivery channel. The optical device is configured to direct a laser beam outward through the aperture. Additionally, the peripheral wall has internal surfaces defining a water delivery channel configured to convey a stream of overlay water to the aperture.
B23K 26/00 - Travail par rayon laser, p. ex. soudage, découpage ou perçage
C21D 10/00 - Modification des propriétés physiques autrement que par traitement thermique ou déformation
B23K 26/064 - Mise en forme du faisceau laser, p. ex. à l’aide de masques ou de foyers multiples au moyen d'éléments optiques, p. ex. lentilles, miroirs ou prismes
Methods, systems, and apparatuses are disclosed for the protection of optical components used during laser bond inspection. In one embodiment, an optic surface wetting enhancement is provided on a protective optic to assist in forming a substantially flat film of transparent liquid from transparent liquid applied to a surface of a protective optic. A flat film of transparent liquid on a surface of a protective optic may be used to retain debris and effluent backscatter produced during a laser bond inspection process.
G02B 27/00 - Systèmes ou appareils optiques non prévus dans aucun des groupes ,
B23K 26/142 - Travail par rayon laser, p. ex. soudage, découpage ou perçage en utilisant un écoulement de fluide, p. ex. un jet de gaz, associé au faisceau laserBuses à cet effet pour l'enlèvement de résidus
B23K 26/146 - Travail par rayon laser, p. ex. soudage, découpage ou perçage en utilisant un écoulement de fluide, p. ex. un jet de gaz, associé au faisceau laserBuses à cet effet l'écoulement de fluide contenant un liquide
15.
Method and apparatus for laser shock peening ballistic armor
Ballistic failure resistance is imparted to metallic ballistic armor plate by identifying a compressive residual stress profile for mitigating a predetermined ballistic failure mode in a metallic ballistic armor plate component, and imparting the identified compressive residual stress profile to the component by laser peening the component in a treatment mode predetermined with reference to the identified compressive residual stress profile.
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 5 J 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.
B23K 26/06 - Mise en forme du faisceau laser, p. ex. à l’aide de masques ou de foyers multiples
B23K 26/00 - Travail par rayon laser, p. ex. soudage, découpage ou perçage
H01S 3/10 - Commande de l'intensité, de la fréquence, de la phase, de la polarisation ou de la direction du rayonnement, p. ex. commutation, ouverture de porte, modulation ou démodulation
Methods, systems, and apparatuses are disclosed for automated dynamic laser peening of a workpiece. In one embodiment, a system for automated dynamic laser peening of a workpiece comprises: a laser; a laser beam delivery system; and a dynamic platform system.
B23K 26/00 - Travail par rayon laser, p. ex. soudage, découpage ou perçage
B23K 26/06 - Mise en forme du faisceau laser, p. ex. à l’aide de masques ou de foyers multiples
B23K 26/08 - Dispositifs comportant un mouvement relatif entre le faisceau laser et la pièce
C21D 10/00 - Modification des propriétés physiques autrement que par traitement thermique ou déformation
B23K 26/356 - Travail par rayon laser, p. ex. soudage, découpage ou perçage pour le traitement de surface par traitement par choc
B23K 26/0622 - Mise en forme du faisceau laser, p. ex. à l’aide de masques ou de foyers multiples par commande directe du faisceau laser par impulsions de mise en forme
19.
Protection of laser bond inspection optical components
Methods, systems, and apparatuses are disclosed for the protection of optical components used during laser bond inspection. In one embodiment, an optic surface wetting enhancement is provided on a protective optic to assist in forming a substantially flat film of transparent liquid from transparent liquid applied to a surface of a protective optic. A flat film of transparent liquid on a surface of a protective optic may be used to retain debris and effluent backscatter produced during a laser bond inspection process.
G01N 19/04 - Mesure de la force d'adhérence entre matériaux, p. ex. du ruban adhésif, d'un revêtement
B23K 26/142 - Travail par rayon laser, p. ex. soudage, découpage ou perçage en utilisant un écoulement de fluide, p. ex. un jet de gaz, associé au faisceau laserBuses à cet effet pour l'enlèvement de résidus
B23K 26/16 - Enlèvement de résidus, p. ex. des particules ou des vapeurs produites pendant le traitement de la pièce à travailler
G02B 1/18 - Revêtements pour garder des surfaces optiques propres, p. ex. films hydrophobes ou photocatalytiques
B23K 26/146 - Travail par rayon laser, p. ex. soudage, découpage ou perçage en utilisant un écoulement de fluide, p. ex. un jet de gaz, associé au faisceau laserBuses à cet effet l'écoulement de fluide contenant un liquide
G01N 21/84 - Systèmes spécialement adaptés à des applications particulières
20.
Laser bond inspection with compact surface motion sensor
G01L 1/24 - Mesure des forces ou des contraintes, en général en mesurant les variations des propriétés optiques du matériau quand il est soumis à une contrainte, p. ex. par l'analyse des contraintes par photo-élasticité
G01B 11/16 - Dispositions pour la mesure caractérisées par l'utilisation de techniques optiques pour mesurer la déformation dans un solide, p. ex. indicateur optique de déformation
G01N 3/06 - Adaptations particulières des moyens d'indication ou d'enregistrement
Methods, systems, and apparatuses are disclosed for laser peening hidden surfaces. In one embodiment, a laser processing pen is provided, the laser processing pen comprising: an elongated member, comprising: a laser pulse entry portion; a laser pulse exit portion, wherein the laser pulse exit portion includes at least one optical lens; and at least one tape guide capable of channeling at least a non-adhesive tape overlay in proximity of the laser pulse exit portion.
B23K 26/06 - Mise en forme du faisceau laser, p. ex. à l’aide de masques ou de foyers multiples
B23K 26/00 - Travail par rayon laser, p. ex. soudage, découpage ou perçage
B23K 26/08 - Dispositifs comportant un mouvement relatif entre le faisceau laser et la pièce
B23K 26/18 - Travail par rayon laser, p. ex. soudage, découpage ou perçage utilisant des couches absorbantes sur la pièce à travailler, p. ex. afin de marquer ou de protéger
G01N 3/08 - Recherche des propriétés mécaniques des matériaux solides par application d'une contrainte mécanique par application d'efforts permanents de traction ou de compression
Methods, systems, and apparatuses are provided for generation of focused stress waves that selectively apply tensile stress to local regions of a bonded article.
A laser shock processing treatment enables a selectively adjustable and customized compressive residual stress distribution profile to be developed within a workpiece by tailoring the size and shape of the laser beam spots. One peening operation applies to the workpiece a first pattern having relatively large laser beam spots and then applies a second pattern having relatively small laser beam spots. The composite use of such small and large beam spots enables the stress distribution profile to be tailored to the part specifications. The large beam spots maximize the depth of compressive residual stress in the part, while the small beam spots optimize the surface compressive residual stresses of the part. The use of small spot beam patterns allows untreated or improperly processed areas to be laser peened.
