| Effect of pulse parameters on microstructure of joint in laser beam welding for SiC_p/6063 composite |
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| 作者姓名： | 牛济泰 张德库 冀国娟 |
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| 作者单位： | State Key Laboratory of Advanced Welding Production Technology，School of Material Science and Engineering，Harbin Institute of Technology，State Key Laboratory of Advanced Welding Production Technology，School of Material Science and Engineering，Harbin Institute of Technology，State Key Laboratory of Advanced Welding Production Technology，School of Material Science and Engineering，Harbin Institute of Technology Harbin 150001，China，Harbin 150001，China，Harbin 150001，China |
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| 基金项目： | Project( 5 9875 0 16)supportedbytheNationalNaturalScienceFoundationofChina |
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| 摘 要： | 1 INTRODUCTIONSiC particlesreinforcedcomposites ,thankstotheirlowcostsandhighlevelofstructuralproperties ,areshowingtheirpotentialincivilandmilitaryappli cation .SiC particlesreinforcedaluminummatrixcomposites wideapplicationinaerospaceandautomo tiveareattributedtotheirperformanceofhighspecif icstrength ,highspecificstiffness ,highelasticmodu lusandexcellentwearresistance .Thecoefficientofthermalexpansionandthermalconductivitycanberegulatedbychangingthecontentandsizeofrein forcingparticl…
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Effect of pulse parameters on microstructure of joint in laser beam welding for SiCp/6063 composite |
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| NIU Ji tai,ZHANG De ku,JI Guo juan.Effect of pulse parameters on microstructure of joint in laser beam welding for SiC_p/6063 composite[J].Transactions of Nonferrous Metals Society of China,2003,13(2). |
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| Authors: | NIU Ji tai ZHANG De ku JI Guo juan |
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| Abstract: | The restraint effects of pulse frequency and pulse duty cycle on the precipitates of harmful needle like Al 4C 3 phase were studied in CO 2 impulsed laser welding through the experiment on the SiC p/6063 composite, and the microstructures of the weld under the different process parameters (pulse time from 1 ms to 20 ms,duty cycle from 50% to 91%) were analyzed. In order to compare, CO 2 continuous laser was conducted under the same efficiency. The results demonstrate that the proper laser pulse frequency and duty cycle can restrain the formation of Al 4C 3 effectively. However, the burning loss of SiC is more serious and the fluidity of molten pool is less in continuous laser welding than in impulsed laser welding. |
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| Keywords: | laser beam welding microstructure aluminum metal matrix composites |
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