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金属学报(英文版) 2000

CALCULATION OF RESIDUAL STRESS FIELD IN LASER TRANSFORMATION HARDENED MoCu NODULAR IRON

L W Zhang,J ThMDe Hosson,YL Xia,F G Wang The State Key Lab for Materials Modification by Laser,Ion,Beams,Dalian University of Technology,Dalian,China,
L. W. Zhang,J. Th.M.De Hosson,Y.L. Xia and F. G. Wang The State Key Lab. for Materials Modification by Laser,Ion and Beams,Dalian University of Technology,Dalian,China

Keywords: laser,transformation,hardening,stress field,fine element

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Abstract:

1.IntroductionInthepasttwodecades,highpowerCOZandNd:YAGlasershavebeenusedinthefieldofsurfaceengineering,suchassurfacetransformationhardening,surfacealloyingandsurfaCecladding.Despitetheadvantageoflasertreatment(improvedwearandcorrosionresistance,smallcellsize,homogenousdistributionofimpurities,contactlessinteractionetc.)thereexistsalsoadisadvantage,i.e.thereishighresidualstressstate,bothintensionandcompression,inlasertreated..t..i.l.1--5].Compressresidualstressishelptoincreasethefatiguelif…

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