Study on shape factor of the fusion-solidification zone of electron beam weld |
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| Authors: | Wang Yajun Guan Yongjun Fu Pengfei Wei Yintao Lu Zhijun School of Mechanical Engineering Automation Beihang University Beijing National Key Laboratory of High Energy Density Beam Processing Technology Beijing Aeronautical Manufacturing Technology Research Institute . State Key Laboratory of Automotive Safety Energy |
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| Affiliation: | [1]School of Mechanical Engineering and Automation, Beihang University, Beijing,100083 [2]National Key Laboratory of High Energy Density Beam Processing Technology, Beijing Aeronautical Manufacturing Technology Research Institute, Beijing, 100024 [3]State Key Laboratory of Automotive Safety and Energy, Department of Automotive Engineering, Tsinghua University, Beijing, 100084 |
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| Abstract: | The concept of shape factors of the fusion-solidification zone is proposed to describe the weld cross section geometry. According to these shape factors, the electron beam weld fusion-solidification zone is divided into four typical shapes and the classification criterion for these typical shapes is suggested. An integrated parameter n1 combining the line power density of electron beam and material thermal properties is proposed to describe the relative power input, and another integrated parameter n2 combing the accelerating voltage and focusing current is proposed to reflect the power distribution in the keyhole. A series of new expressions, which can reflect the influence of focusing current, accelerating voltage, beam current, and material thermal properties, are developed to predict the fusion-solidification zone shape based on experimental results nonlinear fitting of n1 and n2. |
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| Keywords: | electron beam weld fusion-solidification zone shape factor mathematical model |
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