This book, the first of its kind, consolidates the scattered knowledge about lsp into. Laser shock peening performance and process simulation by k. Effective simulation and optimization of a laser peening. The control of residual stress is crucial in ensuring the integrity of engineering components and laser shock peening lsp process can be used to good effect to introduce the beneficial compressive residual stress levels required. Comparison between ultrasonic and laser shock peening treatment on fatigue life performance of alalloy 7075. Program of the 6th international conference on laser peening. Dislocation pinning effects induced by nanoprecipitates. The acoustic wave signal is sampled, stored, digitally filtered. Potential applications of laser shock peen forming have also emerged for automotive, power generation, nuclear waste disposal, drilling, medical implants and recreational sports. Laser peening is proven to increase the lifespan of metal parts by five to 10 times the life of untreated parts even components treated with shot peening, ulrasonic peening, and other conventional processes. Modeling and parameter design of a laser shock peening process article pdf available in international journal for computational methods in engineering science and mechanics 125.
During the laser shock peening, an acoustic emission sensor at a defined position is used to collect the acoustic wave signals that propagate in the air. Design of metal bellows laser shock peening analysis. Mechanism of fatigue performance enhancement in a laser. The depth of surface layer affected by laser shock hardening is above 1 mm. Laser peening generates a stronger shock wave at the part surface, and the benefits of laser peening remain stable at higher temperatures. Through laser sintering, tin nanoparticles are integrated uniformly into iron matrix to form a. Modeling of the superficial laser shock peening treatment.
Laser shock peening performance and process simulation pdf. Download it once and read it on your kindle device, pc, phones or tablets. Woodhead publishing limited, cambridge, england, isbn. Lsp is usually performed in a massively parallel mode to induce uniform compressive residual. Performance and process simulation by describing simulation techniques and procedures through typical case studies, this guide shows engineers and research scientists how to design, evaluate and optimize lsp processes in practical applications. Laser shock peening lsp is a transient process with laser pulse duration time on the order of 10 ns, real time in situ measurement of laser material interaction is very challenging. Laser shock peening and conventional mechanical shot peening are both.
Laser shock peening, performance and process simulation by k. Investigation on laser shock peening capability by fe simulation. Numerical investigation of opposing dual sided microscale laser. This simulation is then used in sensitivity analysis of performance metrics of. Ye, international journal of microstructure and materials properties on deepdyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips. Pdf modeling and parameter design of a laser shock peening. Laser shock peening and mechanical shot peening processes. Laser shock peening lsp is a surface treatment process to improve surface integrity.
Laser peening process and its impact on materials properties. Effects of simulation parameters on residual stresses in. In this paper, the process parameters are identified and a. Optimization of laser shock peening process using finite. Laser shock processing lsp is one of the surface treatment processes to improve.
Comparison between ultrasonic and laser shock peening. Lsp can greatly improve the resistance of a material to crack initiation and propagation brought on by. Dec 17, 2019 effect of laser shock peening on the wearcorrosion synergistic behavior of an az31b magnesium alloy. Laser shock peening performance and process simulation k. Improvements of their surface mechanical properties to overcome such phenomena are of great interest. Effect of damping profiles on laser peening simulation time stefano coratella, university of dayton research institute, usa. By using finite element analysis, we proposed an applicable finite element method of laser shock peening lsp and discussed various parameters, such as solution time, stability limit, dynamic yield stress, peak pressure, pressure pulse duration, laser spot size, and multiple lsp. In this paper, numerical and experimental studies have been carried out to study the effects of nanoparticles integrated structures during the laser shock peening of aluminum alloys. Laser peening or laser shock peening counteracts metal fatigue to prevent corrosion and cracking of missioncritical parts. Acoustic wave detection of laser shock peening opto.
Nevertheless, minimal research has been conducted on laser shock peening and mechanical shot peening of technical grade ceramics. Nano wc powder cold surface enhancing of aluminium alloy. Laser shock peening lsp is one of the most efficient ways to increase component fatigue life. Lsp is a process to induce compressive residual stresses using shock waves generated by laser pulses. Dec 21, 2010 laser shock peening lsp is one of the most efficient ways to increase component fatigue life. Threedimensional simulation of single and multiple laser shock peening 6.
Performance and process simulation woodhead publishing series in metals and surface engineering kindle edition by k ding, l ye. A numerical analysis of laser shock peening lsp process is illustrated, applied to an open hole specimen. The laser shock peening effect and its influence on rolling contact fatigue of ferritepearlite steel were investigated experimentally. Use features like bookmarks, note taking and highlighting while reading laser shock peening. The process design, enhanced mechanical performance, and microstructure evolution of wlsp are discussed in details. Critical laser parameters for lsp such as laser energy, pulse width, wavelength, overlap rate, role of sacrificial coating and transparent overlay are. International conference of multiscale modeling and simulation icmms08, pp. Laser shock peening lsp is a process for inducing compressive residual stresses using shock waves generated by laser pulses. The aim of the current work is to investigate the effects of the. Effect of laser shock peening on the wearcorrosion synergistic behavior of an az31b magnesium alloy. Laser shock peening performance and process simulation.
Dislocation pinning effects induced by nanoprecipitates during warm laser shock peening. Effects of parameters related to finite element simulation of laser shock peening process to determine residual stresses are discussed, in particular parameters associated with the lsp process, such as the maximum pressure, pressure pulse duration, laser spot size and number of shots. Pdf laser shock peening lsp is a surface treatment technique that has been. Experiment, modeling and simulation, journal of manufacturing science and engineering, vol. This pioneering book was the first of its kind to consolidate scattered. Microhardness on the steel surface is increased after laser shock treatment. Lsp can greatly improve the resistance of a material to c. Lsp is a cold mechanical process where pressure waves caus ed by expanding plasma plastically deform the surface of a material. Jan 24, 2006 laser shock peening lsp is a process for inducing compressive residual stresses using shock waves generated by laser pulses. Report by advances in natural and applied sciences.
Further investigated is carried on the effect of lsp parameters such as pressure pulse shape and magnitude, spot size and shape, number of shots, layout of shots, and multiple shot sequences towards residual stress. Laser peening is a more targeted and controlled process than shot peening. Effects of simulation parameters on residual stresses for. Simulation of laser shock peening on a curved surface. Whereas shot peening may be applied over the entire surface of a part, laser peening is only applied to critical, fatigueprone areas.
Laser shock peening lsp is an advanced mechanical surface enhancement technique used predominantly in the aircraft industry. The acoustic wave signal is sampled, stored, digitally filtered and analyzed by the online laser shock peening detection system. Aluminum alloy 5a06 has many superior properties such as high strength, good corrosion resistance and welding performance. Article information, pdf download for laser shock peening and. This study investigates the fundamental mechanism of fatigue performance enhancement during a novel hybrid manufacturing process, which combines laser sintering of superhard nanoparticles integrated nanocomposites and laser shock peening lsp. Kobayashi2 1 department of materials engineering, the university of tokyo, japan 2 shintokogio, ltd. Simulation and experimental study on residual stress. The effect s of peak pressure and layer thickness were studied when coupling laser shock peening with selective laser melting.
Laser powder bed fusion lpbf suffers from process related high residual stresses, limiting the integrity of the consolidated materials, and related industrial applicability. Laser shock peeninga very promising life enhancement techniquehas demonstrated great success regarding the improvement of fatigue behavior via deep compressive residual stresses. Consolidates knowledge and experience into a comprehensive publication. The purpose of our research was to investigate the influence of pulse density and spot size of a laser shock peening lsp process on the surface integrity with the fatigue resistance of. Higounenc1 1 metal improvement company i curtiss wright surface technologies, bayonne, france abstract in laser peening lp, compared to shot peening sp, the magnitude of residual compressive. Effects of simulation parameters on residual stresses in 3d finite element laser shock peening analysis. Laser shock peening an overview sciencedirect topics. Lsp is usually performed in a massively parallel mode to induce uniform compressive residual stress across the entire surface of the workpiece. International journal for computational methods in engineering science and mechanics. Optimization of peenedsurface laser shock conditions by method of. The effects of parameters related to the finite element simulation of the lsp process on the residual stresses of. Lsp technologies patented laser peening process is. Numerical analysis of laser shock peening as a process for. Performance and process simulation woodhead publishing series in metals.
Laser shock peening lsp can be used to modify the surfacenear stressstate in metal parts by focussing a highpower pulsed. Dynamic response and residual stress fields of ti6al4v. Laser shock peening lsp is a relatively new surface treatment for metallic. Science and technology, general aluminum alloys mechanical properties research aluminum plate diagnosis, ultrasonic usage diagnostic ultrasonography fatigue risk factors fatigue materials fatigue testing. Activities encompass a wide range of industrialized mechanical surface enhancement technologies focusing on metal surface finishing and fatigue enhancement processes. The majority of the controlling parameters of the process have been taken into account. In the lsp process, a water layer with a thickness of about 1 mm was used as the transparent. Finite element modeling of hybrid additive manufacturing. However, the prediction and adaption of residual stress fields on basis of the laser peening parameters are still not comprehensively established. As a new treatment process after welding, the process parameters of laser shock peening lsp in dynamic strain aging dsa temperature regimes can be precisely controlled, and the process is a noncontact one. Hatamleh, the university of texas at dallas, usa id 024.
Program of the 6th international conference on laser peening and related phenomena south africa, 611 november 2016 sunday, 6 november. Enhancement of rolling contact fatigue performance of ferrite. Laser shock peening lsp was coupled with selective laser melting in a 2d finite element simulation in abaqus to quantify the resulting residual stress fields. Lsp can greatly improve the resistance of a material to crack initiation and propagation brought on. Program of the 6th international conference on laser.
It is widely used in aerospace, ship craft and transportation areas. Laser shock peening is been used to prolong the fatigue life of critical aerospace components such as turbine engines and aircraft structures as well as for wing skins to achieve the requirements of the new generation of intercontinental aircraft. Jul 17, 20 by using finite element analysis, we proposed an applicable finite element method of laser shock peening lsp and discussed various parameters, such as solution time, stability limit, dynamic yield stress, peak pressure, pressure pulse duration, laser spot size, and multiple lsp. Laser shock peening lsp is recognized as an efficient surface tratment to improve the fa tigue life of metal components. Laser shock peening lsp is an innovative process which imparts compressive residual stresses.
This paper presents a numerical simulation of the laser shock peening lsp process using finite element method fem. Laser shock peening lsp is a surface treatment process to improve surface integrity and. Performance and process simulation, woodhead publishing, 2004. Improvement in fatigue performance of aluminium alloy. The model was used to explain the results of laboratory fatigue experiments, containing different lsp patch geometries, supplementary stress raising features and different specimen thickness. In particular, it describes numerical simulation techniques and procedures that can be adopted by engineers and research scientists to design, evaluate, and optimize lsp processes in practical applications. In order to overcome the existing disadvantages of offline laser shock peening detection methods, an online detection method based on acoustic wave signals energy is provided. Experimental and numerical study of laser shock peening process of aa2198t3 and aa2198t8 mohammad i. Ding k, ye l 2006 laser shock peening performance and process simulation. Laser peening lp, or laser shock peening lsp, is a surface engineering process used to impart beneficial residual stresses in materials.
It showed that micro hardness and surface compressive stress were significantly improved using laser shock peening. Laser shock peening process development for turbine blade. Application of design of experiments for laser shock peening. Yelaser shock peening performance and process simulation. Lsp can greatly improve the resistance of a material to crack initiation and propagation brought on by cyclic loading and fatigue. Enhancement of rolling contact fatigue performance of. An output beam, roughly 25 joules at 18 nanoseconds from a nd. The residual stress introduced by laser shock peening lsp. The paper focuses on a development of various modeling techniques to.
Finite element models, using the eigenstrain approach, are described that predict the residual stress fields associated with laser shock peening lsp applied to aerospace grade aluminium alloys. It is a relatively new surface treatment for metallic materials that can greatly improve their resistance to crack initiation and propagation brought on by cyclic loading and fatigue. Laser shock peening in the recent years has proved to be successful with steels, aluminium and titanium surfaces and metallic alloys in general. This specimen is representative of a section of an aircraft fuselage lap joint, typically prone to fatigue crack nucleation at the rivet holes. Ae monitoring in water during laser shock peening process. A brief introduction covering lsp process, lsp on various materials and some innovative applications of lsp have been discussed. The effects of lsp at elevated temperatures on the distribution of the surface. Dislocation dynamic simulation and experiments yiliang liao,1 chang ye,1 huang gao,1 bongjoong kim,2 sergey suslov,2 eric a. Lspt uses its patented laserpeen process to provide laser peening production services at our facility for customers that include. Laser shock peening describes the mechanisms of lsp and its substantial role in improving fatigue performance in terms of modification of microstructure, surface morphology, hardness, and strength features.
Surface enhancement is a key process stage for improving the functionality, performance, and longevity of a component. It is, however, difficult to use normal laser peening control systems to establish the ideal peening conditions that will result in the best component performance. Laser shock peening lsp is a relatively new surface treatment for metallic materials. Ae monitoring in water during laser shock peening process t. The pulse duration was 50 ns, spacing between consecutive pulses along a. Optimizing residual stress profile induced by laser shock. Noyan, microscale laser shock peening of thin films, part1. Pdf fatigue behaviour of geometric features subjected to. The deep, high magnitude compressive residual stresses induced by laser peening increase the resistance of materials to surfacerelated failures, such as fatigue, fretting fatigue and stress corrosion cracking. Twodimensional simulation of single and multiple laser shock peening 5. Recently, thanks to the advance of laser technology, high repetition. Effective simulation and optimization of a laser peening process.
Material model validation for laser shock peening process. The purpose of this paper is to model 3d shock pressure and dynamic mechanical behavior at high strain rates. Dynamic response and residual stress fields of ti6al4v alloy. Laser shock peening lsp is an efficient surface treatment technique used to improve the fatigue performance of metals. To reduce costs and make the technique available on a largescale basis for industrial applications, simulation of the lsp process is required. The characterization and simulation of cylinder liner surface finishes. Modeling and parameter design of a laser shock peening process. Laser shock peening lsp is a surface treatment process to improve surface integrity and fabricate micro surface structures. Simulation of residual stresses in a laser peened camshaft. Cheng1,3,a 1school of industrial engineering, purdue university, west lafayette, indiana 47906, usa 2school of materials science, purdue university, west. Wright, numerical optimization, 2nd edition, springer, 2006. Abstractaser shock peening lsp is an innovative surface laser shock peening lsp is an innovative surface treatment technique, producing fatigue performance of metallic. To improve the application of laser shock peening, it is of critical importance to optimize the process by fully understanding the effects of different parameters.
Twodimensional simulation of twosided laser shock peening on thin sections 7. Laser shock peening by k ding overdrive rakuten overdrive. Material model validation for laser shock peening process simulation h k amarchinta, r v grandhi, k langer et al. Laser peening lp is a surface enhancement technique that has been applied to improve fatigue and corrosion properties of metals.
643 1466 738 1482 373 652 1598 952 354 1061 1236 409 1491 1139 1501 1319 924 1337 403 476 938 137 817 1250 1261 892 503 1094 1023 717 188 809 387 742 45 1496 1229 303 771 607 727