| Calculation of Transient Stress Field During Laser Transformation Hardening Process |
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| 作者姓名： | Liwen Zhang J. Th.M.De Hosson Yuanliang Xia Fugang Wang . The State Key Laboratory for Materials Modification by Laser Ion and Electron Beams . Material Engineering |
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| 作者单位： | Liwen Zhang，J. Th.M.De Hosson，Yuanliang Xia，Fugang Wang 1. The State Key Laboratory for Materials Modification by Laser，Ion and Electron Beams 2. Material Engineering Department of Dalian University of Technology，Dalian 116023，China |
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| 摘 要： | IntroductionHighpowerCOzlaserssdsetransformationhardeningtechniquehasbeensuccessfullyusedinindusnyforWYears.BecausethetemPeratUrefleldislocalizedinmaterialdurllglasertransfonnationhMngProcess,highthermstrCsswillgenerateinmatgrialduringlasertfansformationhardeningProcess.Therisalsohighresidualstressinmaterial,bothintCnsionandcomPression'-'].ComPressresidualstressishelptoincreasethefatigueldrimeofthelasertreatedmaterial,butthetensilestresswillshortenthefatiguelifetmeofthelasertreatedmator…
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Calculation of Transient Stress Field During Laser Transformation Hardening Process |
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| Liwen Zhang,J. Th.M.De Hosson,Yuanliang Xia,Fugang Wang . The State Key Laboratory for Materials Modification by Laser,Ion and Electron Beams . Material Engineering.Calculation of Transient Stress Field During Laser Transformation Hardening Process[J].Journal of Shanghai Jiaotong university,2000(1). |
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| Authors: | Liwen Zhang J ThMDe Hosson Yuanliang Xia Fugang Wang |
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| Institution: | Liwen Zhang,J. Th.M.De Hosson,Yuanliang Xia,Fugang Wang 1. The State Key Laboratory for Materials Modification by Laser,Ion and Electron Beams 2. Material Engineering Department of Dalian University of Technology,Dalian 116023,China |
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| Abstract: | A thermal elastic-plastic Two-D finite element model to calculate the transient stress field during laser transformation hardening process was developed in this paper. The mechanical properties of material, Young's module E, Poisson's ratio v, yield limit s2 and thermal expansion coefficient a are all considered to change with temperature. The equivalent expansion method was used to deal with the problem with phase transformation. A program to calculate the transient stress field was developed using FORTRAN language. The transient and residual stress fields during CO2 laser transformation hardening process of MoCu nodular iron were calculated. The residual stress fields were measured using X-ray diffraction method. The calculated residual stress field of laser transformation hardened MoCu nodular iron is in good agreement with the experimental result. |
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| Keywords: | Laser Transformation Hardening Stress Field Finite Element |
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