3d laser shock peening a new method for improving

"Laser Shock Peening Pressure Impulse Determination via

May 27, 2020 · Laser shock peening (LSP) is a form of work hardening by means of laser induced pressure impulse. LSP imparts compressive residual stresses which can improve fatigue life of metallic alloys for structural use. The finite element modeling (FEM) of LSP is typically done by applying an assumed pressure impulse, as useful experimental measurement of this pressure impulse has not

(PDF) Pore Closure Effect of Laser Shock Peening of

Laser shock peening has become well known as a method to improve the fatigue properties of materials, including those of additively manufactured aluminum alloys. 3D surface view before (left (PDF) Review:Laser shock peening as post welding Combining laser welding and laser shock peening could be an alternative and promising approach for improving weld quality over di erent conventional methods of post weld treatments. With this

(PDF) Review:Laser shock peening as post welding

Combining laser welding and laser shock peening could be an alternative and promising approach for improving weld quality over di erent conventional methods of post weld treatments. With this 3D Laser Shock Peening A new method for improving Although Selective Laser Melting (SLM) currently revolutionizes the way parts are being manufactured, certain process inherent limitations such as accumulation of residual stresses and increased

3D Laser Shock Peening A new method for the 3D

3D Laser Shock Peening A new method for the 3D control of residual stresses in Selective Laser Melting. Type Articles dans des revues avec comité de lecture. Author. KALENTICS, Nikola 302851 Ecole Polytechnique Fédérale de Lausanne [EPFL] BOILLAT, Eric 3D Laser Shock Peening A new method for the 3D control 3D Laser Shock Peening A new method for the 3D control of residual stresses in Selective Laser Melting NikolaKalenticsa EricBoillata PatricePeyreb CyrilGornyb ChristophKenelc ChristianLeinenbachc JamaspJhabvalaa Roland E. Logéa https://doi/10.1016/j.matdes.2017.05.083 Get rights and content

3D Laser Shock Peening A new method for the 3D control

Sep 15, 2017 · 3D LSP is a hybrid process which combines and applies Laser Shock Peening (LSP) during Selective Laser Melting (SLM) . The LSP process converts the tensile residual stresses (TRS) to more beneficial compressive residual stresses (CRS) . A smaller LSP spot size leads to a larger maximum CRS. . 3D laser shock peening as a way to improve geometrical Nov 17, 2018 · One of the major drawbacks of selective laser melting (SLM) is the accumulation of tensile residual stresses (TRS) in the surface and subsurface zones of produced parts which can lead to cracking, delamination, geometrical distortions, and a decrease in fatigue life. 3D laser shock peening (3D LSP) is a novel hybrid method which introduces a repetitive LSP treatment during the

3D laser shock peening as a way to improve geometrical

One of the major drawbacks of selective laser melting (SLM) is the accumulation of tensile residual stresses (TRS) in the surface and subsurface zones of produced parts which can lead to cracking, delamination, geometrical distortions, and a decrease in fatigue life. 3D laser shock peening (3D LSP) is a novel hybrid method which introduces a repetitive LSP treatment during the manufacturing A new hybrid Additive Manufacturing process combining In order to address these limitations, a novel hybrid additive manufacturing process entitled 3D Laser Shock Peening (3D LSP) was developed and patented. 3D LSP repetitively introduces Laser Shock Peening (LSP), a well-known surface post treatment, during the building phase of SLM in order to introduce beneficial compressive residual stresses

Advances in Microscale Laser Shock Peening

analysis provide new methods for characterizing the microstructure formation and distribution of plastic de-formation for microscale laser shock peening. 1 Experiment and Simulation Conditions 1.1 Laser shock peening experiment conditions As illustrated in Fig. 1, a frequency tripled Q-switched Nd:YAG laser ( = 355 nm) in the TEM00 mode was Application of laser shock peening2. Laser shock peening Laser Shock Peening (LSP), as a technique for surface processing, has been in existence for over 25 years. LSP being a new implementation of an old technique of creating surface compressive residual stresses, also has a unique advantages over conventional shot peening.

Bend bar quality control method for laser shock peening

Bend bar quality control method for laser shock peening Abstract A bend bar is available for use in a quality control test for testing for a consistency of residual stress effects in a particular material using a given a laser peening process. The bar is composed of the particular material to be tested and has a bar length and a bar thickness. Dry laser peening method uses femtosecond laser pulses Laser peening technique does not need a sacrificial overlay under atmospheric conditions TOMOKAZU SANO. L aser peening, or laser shock peening, is a surface modification technology using laser-driven shock compression to improve the properties of metals such as hardness, residual stress, fatigue properties, and corrosion resistance. A nanosecond pulsed laser is presently utilized as a laser

Eliminating cracks in 3D-printed metal components - EPFL

Laser shock peening is normally reserved for surface treatments, explains Logé. But in our case, it has become a bulk treatment, in that it operates in 3D within the material itself. Several 3D-printing companies have eed an interest in the new technique. Eliminating cracks in 3D-printed metal components - EPFLLaser shock peening is normally reserved for surface treatments, explains Logé. But in our case, it has become a bulk treatment, in that it operates in 3D within the material itself. Several 3D-printing companies have eed an interest in the new technique.

Healing cracks in selective laser melting by 3D laser

Dec 01, 2019 · 3D Laser Shock Peening (3D LSP) is a hybrid Additive Manufacturing process which repeatedly applies Laser Shock Peening (LSP), a well-known surface treatment [23,24], during the building phase of SLM. It was developed and patented by the Laboratory of Thermomechanical Metallurgy at EPFL . Healing cracks in selective laser melting by 3D laser Dec 01, 2019 · N. Kalentics, et al.3D laser shock peening a new method for the 3D control of residual stresses in selective laser melting Mater. Des., 130 (2017), pp. 350-356

Healing cracks in selective laser melting by 3D laser

Selective Laser Melting (SLM) of Ni-based superalloys such as CM247LC is prone to weld-cracking. This paper investigates how to suppress cracks by repeatedly applying Laser Shock Peening (LSP) during the building phase of SLM. Samples made of CM247LC were processed with different LSP parameters, and the influence on bulk crack density has been quantified. Healing cracks in selective laser melting by 3D laser Selective Laser Melting (SLM) of Ni-based superalloys such as CM247LC is prone to weld-cracking. This paper investigates how to suppress cracks by repeatedly applying Laser Shock Peening (LSP) during the building phase of SLM. Samples made of CM247LC were processed with different LSP parameters, and the influence on bulk crack density has been quantified.

Investigation of the effect of Laser Shock Peening in

Aug 01, 2020 · Laser shock peening (LSP) has previously been applied successfully to conventionally produced components to introduce beneficial compressive residual stresses in the surface region and thus increase fatigue life. LSP is a well-known surface treatment. Laser Peening Curtiss-Wright Surface TechnologiesNov 16, 2020 · Laser peening is an alternative for controlled shot peening where deep penetration, upwards to ½ in (12 mm) and low amounts of cold work are advantageous. Assessment of application identifies if one or both methods should be used. Laser peening has made an important impact on industry providing a reliable and production qualified technology.

Laser shock peening apparatus with a diffractive optic

A laser peening apparatus for improving properties of a workpiece by providing shock waves therein, comprising: particularly known methods for the laser shock processing or peening of solid materials, typically use coherent energy from a laser light energy into a large number of waves which recombine to form a completely new wave or Laser shock peening apparatus with a diffractive optic A laser peening apparatus for improving properties of a workpiece by providing shock waves therein, comprising: particularly known methods for the laser shock processing or peening of solid materials, typically use coherent energy from a laser light energy into a large number of waves which recombine to form a completely new wave or

Laser shock peening in the medical sector:An overview

Laser shock peening (LSP) has been proved to be an innovative surface modification technique since its development in the 1970s. The technique was initially employed to resolve aviation and manufacturing problems for improving fatigue life, anticorrosion, and wear resistance. Laser shock peening:A promising tool for tailoring Apr 01, 2019 · 2.2. Laser shock peening. Laser Shock Peening (LSP) treatments were applied on the top surface of the final SLM AB samples employing water as confinement medium (see Fig. 1a). The laser source was a Nd:YAG SAGA HP - class laser from Thales Group with a pulse duration of 6.3 ns at 1064 nm wavelength and a top-hat beam spatial energy distribution.

New laser 3D-printing technique to manufacture metal

Nov 21, 2019 · To develop this new method, scientists used a technique named laser shock peening, or LSP, to heal cracks on the fly during the 3D-printing process. During this process, a solid-state laser beam is pulsed on a metallic surface. Shock waves are then generated, traveling throughout the component under construction. New laser 3D-printing technique to manufacture metal Nov 21, 2019 · To develop this new method, scientists used a technique named laser shock peening, or LSP, to heal cracks on the fly during the 3D-printing process. During this process, a solid-state laser beam is pulsed on a metallic surface. Shock waves are then generated, traveling throughout the component under construction.

Nikola KALENTICS École Polytechnique Fédérale de

3D Laser Shock Peening A new method for improving fatigue properties of Selective Laser Melted parts lead to a decrease in fatigue life of produced parts. 3D Laser Shock Peening is a new Peening eliminates cracks in 3D-printed metal partsNov 27, 2019 · A method known as laser shock peening, or LSP, is the key to healing cracks on the fly during the 3D-printing process. LSP works by periodically directing high-intensity laser pulses on the component under construction. It acts as a sort of high-energy photonic hammer, sending shock waves through the material. The method involves two lasers.

Seth GRIFFITHS PhD

3D Laser Shock Peening A new method for improving fatigue properties of Selective Laser Melted parts lead to a decrease in fatigue life of produced parts. 3D Laser Shock Peening is a new Shock pressure gauge for laser peening apparatusLaser shock peening is a process for improving the fatigue, hardness, and corrosion resistance properties of materials by focusing radiation on preselected surface areas of a workpiece. Shock peening the workpiece can avoid gross deformation, cracking, and spallation of the workpiece,

The effects of laser peening on laser additive

Mar 17, 2020 · Laser peening has an extensive application in traditional manufacturing industry. However, in additive manufacturing, the initial stresses on the parts often reduce the effects of laser peening and make it hard to achieve a desirable residual stress distribution. In this investigation, the interaction of initial residual stress and laser peening-induced stress was studied through numerical 3D laser shock peening A new method for improving May 01, 2020 · Abstract. Although Selective Laser Melting (SLM) currently revolutionizes the way parts are being manufactured, certain process inherent limitations such as accumulation of residual stresses and increased porosity content can lead to a decrease in fatigue life of produced parts. 3D Laser Shock Peening is a new hybrid additive manufacturing process whereby a periodic Laser Shock Peening (LSP) treatment

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