A laser peening or laser shock peening is a novel technique for making the metal surfaces and sub-layers densify.It evokes that laser shock peening adoption results in yielding and plastic deformation,thereby creating high compressive residual stresses extending below the surface of the material which is desirable for hydrogen embrittlement Author Michael Munther,Tyler Martin,Ali Tajyar,Lloyd Hackel,Ali Beheshti,Keivan DavamiPublish Year 2020Effect of laser shot peening on precipitation hardened Currently these factors are considered for the multiple laser peening is peeled off the surface as a result of multiple impacts of laser Effect of laser shock peening on mechanical and
Author R.Sundar,C.Sudha,A.K.Rai,P.Ganesh,Ashish Kolhatkar,S.Murugesan,V.Karthik,R.Biswal,S.Publish Year 2020Study on effect of time parameters of laser shock peening
May 20,2014·Laser shock peening (LSP) is the newest and most innovative surface treatment technique.LSP residual stress distribution is affected by many parameters.Of them,the parameters are main factors that determine the convergence of finite element analysis (FEA) and characteristic of pressure pulse of laser system.Author Z F Yang,Z B An,X J Shen,C Wang,X ZhouPublish Year 2019(PDF) Effect of laser shock peening (LSP) on the phase The regions exposed to multiple shot laser irradiation,normally,experiences a maximum shock pressure and gradually decreases towards the depth as reported by Nath et al.(2018).It is clear thatCited by 12Publish Year 2018Author Hao Wang,Yihui Huang,Wenwu Zhang,Andreas OstendorfEffect of Multiple Laser Shock Peening on the Mechanical The study conducted proposes the effect of multiple laser shock peening (LSP) on ETP steel alloy plates,with a low energy laser to investigate the changes in the mechanical properties of the material.In this paper,a study of the microstructure,micro hardness and surface morphology has been conducted on the parent sample,and the laser peened sample.
Cited by 1Publish Year 2018Author Samuel Adu-Gyamfi,Philip Agyepong Boateng,Enoch Asuako Larson,Philip Yamba,Anthony AkayetiInvestigation on the effect of microstructure and
Mar 08,2019·Abstract.This paper aims to determine the effects of microstructure and mechanical properties of laser cladding TC17 titanium alloy post laser shock peening (LSP) In this work,A 3J,20ns,1064nm wavelength,Nd:YAG laser was employed on laser cladded TC17 titanium alloy samples with multiple impacts.Micro-hardness,residual stress were measured.Cited by 1Publish Year 2019Author Yu Lin,Shi-yan Ding,Liu-cheng Zhou,Wei-feng He,Zhen-bing Cai,Wen-jian Wang,Zhong-rong ZhouEffect of Laser Shock Peening on Fatigue Life at Stress Fatigue failure due to stress raiser regions on critical rotating components in gas turbine engines,such as the shaft,is a crucial aspect.Methods to reduce these stresses and improve fatigue life are a source of ongoing research.Laser shock peening is a method where compressive residual stresses are imparted on the stress raisers of such components.Cited by 23Publish Year 2018Author Ruixia Zhang,Xianfeng Zhou,Xianfeng Zhou,Hongyu Gao,Steven Mankoci,Yang Liu,Xiahan Sang,HaifeEffect of laser shock peening on mechanical properties of Sep 15,2014·An alternative innovation surface technique,namely laser shock peening (LSP),can introduce compressive residual stress to a workpiece using a high power,Q-switched laser pulse ,,.It has been effectively used in improving the mechanical properties of a number of metals and alloys ,.In a typical LSP,a high power shock wave propagates into the surface of the workpiece.
Cited by 26Publish Year 2014Author Jie Fu,Yunhu Zhu,Chao Zheng,Ren Liu,Zhong JiEffect of multiple laser peening on surface integrity and
Sep 09,2019·EBSD analysis shows that LP treatment with multiple layers can introduce a large amount of lower-angle boundaries,indicating that dislocations beneath the top surface could induce a strain-hardened layer.The microtexture of the DLD-built Ti6Al4V alloy cannot be eliminated to decrease the anisotropy of the mechanical property.Cited by 2Publish Year 2019Author Yongxiang Hu,Mengqi Lai,Zonghao Hu,Zhenqiang YaoCrystal Plasticity Modeling of Laser Peening Effects on Mar 26,2021·Abstract.This study aims to model the effects of multiple laser peening (LP) on the mechanical properties of AA2024-T351 by including the material microstructure and residual stresses using the crystal plasticity finite element method (CPFEM).In this approach,the LP-induced compressive residual stress distribution is modeled through the insertion of the Eigenstrains as a function of depth,Cited by 3Publish Year 2019Author Huan Chen,Aixin Feng,Jing Li,Jing Li,Tiandai Jia,Yong LiuEffect of Multiple Laser Shock Peening on the Mechanical The study conducted proposes the effect of multiple laser shock peening (LSP) on ETP steel alloy plates,with a low energy laser to investigate the changes in the mechanical properties of the
Cited by 3Publish Year 2019Author Jan G.Pretorius,Dawood A.Desai,Glen C.SneddenEnhanced high cycle fatigue resistance of Ti-17 titanium
Jun 25,2019·In contrast to the present study,it was reported by A.Umapathi et al.that the increase of the laser impacts did not induce the hardening but softening of the TC6 titanium alloy with multiple peening at 6 GW/cm 2.This apparent contrast can be explained by the repetition rate,as they used the repetition rate of 10 Hz in comparison with the present study (3 Hz),because lower repetition rate canCited by 3Publish Year 2019Author Yang Jiao,Weifeng He,Xiaojun ShenStrengthening effect of laser shock peening on 7075-T6 The results show that,for large area laser shot peening,the residual compressive stress with good uniformity and deep depth can be obtained by using the overlap ratio larger than 50%.In the study of microstructure after laser shock peening,Ding et al.9 studied the effect of shock times on the grain refinement of LY2 aluminum alloy.The Cited by 5Publish Year 2014Author Ju Hee Kim,Yun Jae Kim,Jong Woo Lee,Sam Hyeon YooInfluence of laser shock peening parameters on the Jul 10,2019·The effects of laser shock peening (LSP) parameters (laser shock times and laser energy) on the impact abrasive wear behavior of TC4 titanium alloy were studied under the sand environment using self-developed impact wear test equipment.The mechanical properties,energy response,wear scars,and wear mechanism were analyzed.
Cited by 6Publish Year 2018Author Chengyi Ning,Guangyi Zhang,Yapeng Yang,Wenwu ZhangEffects of Laser and Shot Peening on fatigue life in
3) Mechanical Engineering Dept.,University of South Carolina,Columbia,South Carolina 29208 Abstract The effects of laser,and shot peening on the residual stresses in Friction Stir Welds (FSW) has been investigated.The surface residual stresses were measured at five differentCited by 76Publish Year 2012Author J.Z.Zhou,S.Huang,J.Sheng,J.Z.Lu,C.D.Wang,K.M.Chen,H.Y.Ruan,H.S.ChenEffect of multiple laser peening on surface integrity and Findings Multiple overlapping layers of LP treatment result in slight influence on the polished surface of DLD-built samples.Porosity measured by the Archimedes test is found to be greatlyEffect of Laser Shock Peening (LSP) Without Coating oneffeCt of lASer ShoCk Peening (lSP) Without CoAting on SurfACe 91 Yp = 1/ Np (2) where,N P is the laser pulse density and F is the laser pulse repetition rate. The peak power density G and the coverage C V can be determined by the above formulae C V= A PN P (3) G = E P/ (A P) (4) where,AP is the beam spot area which is equal to D 2/ 4 and is the duration of the pulse width in
May 28,2020·Present work investigates the effect of laser shock peening on the microstructure and properties of alloy D9,a candidate material for the core applications in fast breeder reactors.For select peening parameter,surface and depth distribution of residual compressive stresses,microstructure,hardness,tensile properties and thermal diffusivity have been compared with a reference (annealed Effect of repeated impacts on mechanical properties and Mar 30,2012·The effect of repeated impacts on mechanical properties and fatigue fracture morphologies of 6061-T6 aluminum subject to laser peening (LP) were investigated.Compared with the untreated samples,nano-hardness and fatigue lives of the samples subjected to 1-3 LP impacts increased by 18.159.1% and 7.399.4%,respectively.Effects of Laser Shock Peening on the Mechanical Behaviors ·This paper presents the after effect of laser shock peening (LSP) on AA2024 alloy specimen irradiated with the L-Spiral scanning pattern at different pulse energies.The surface morphology indicates an increase in surface roughness after LSP.The X-Ray diffraction analysis of the LSP treated specimens were compared with the untreated specimen.
Apr 17,2019·The experimental results showed that laser peening,especially multiple laser peening impacts has significant effects on the microhardness,residual stress and microstructure of 40CrNiMo steel.The surface roughness and the depth of the pit increased with increasing the impact times.After 3 laser peening impacts,the surface microhardness,compressive residual stress,the strength andEffects of laser peening on fretting wear behaviour of This paper deals with the effects of laser peening on fretting wear behaviour of a nickel-based superalloy,alloy 718,fretted against two different counterbody materials (alumina and SAE 52100 steel).Laser peening was carried out on alloy 718.Investigation of multiple laser shock peening on the Compared with the untreated sample,the electrochemical corrosion rate of the treated samples decreased by 74.91% and 95.03% after being treated by 1 and 3 LSP impacts,respectively.The reasons for the enhancement of the wear properties and electrochemical corrosion behavior were caused by the increased residual stress and microhardness after the LSP treatment.
Jun 17,2020·Zhou J Z et al 2012 Effect of repeated impacts on mechanical properties and fatigue fracture morphologies of 6061-T6 aluminum subject to laser peening Mater.Sci.Eng.A 539 3608.Crossref Google ScholarMicrostructure and mechanical properties of TC17 titanium The microstructure and mechanical properties of TC17 titanium alloy with and without laser shock peening (LSP) were examined and compared.The titanium alloy samples were laser shock peened with different impacts at the same power density.Microstructure,microhardness and residual stress of TC17 titanium alloy introduced by LSP with different impacts were discussed by scanning electron OSA Effect of laser shock peening on electrochemical The effects of laser shock peening (LSP) treatment with different impacts on surface roughness,micro-hardness,microstructural observations,residual stress,and electrochemical corrosion resistance of IN718 superalloy were investigated.Results show that the corrosion potential increases to 0.4863 V,0.2956 V,and 0.3578 V,and the corrosion rate reduces 66.10%,79.08%,and 84.07%
Apr 15,2018·Laser shock peening (LSP) is a promising surface modification method that not only improves surface hardness,tensile and fatigue strength [,,],but also increases the corrosion resistance [11,12] and wear resistance [13,14] of many metals.Compared with coating and alloying,a notable advantage of LSP is that it does not introduce new materials or coatings to the metallic alloys.