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| SIMULATION AND EXPERIMENTAL STUDY OF PREPARATION OF FUNCTIONALLY GRADIENT MATERIALS BY MIG WELDING UNDER MAGNETIC FIELD\par |
| WANG Chao ZHANG Haiou WANG Guilan |
1) State Key Laboratory of Digital Manufacturing and Equipment Technology, School of Mechanical Engineering, Huazhong University of Science and Technology, Wuhan 430074
2) State Key Laboratory of Plastic Forming Simulation and Die \& Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074 |
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Cite this article:
WANG Chao ZHANG Haiou WANG Guilan. SIMULATION AND EXPERIMENTAL STUDY OF PREPARATION OF FUNCTIONALLY GRADIENT MATERIALS BY MIG WELDING UNDER MAGNETIC FIELD\par. Acta Metall Sin, 2011, 47(9): 1221-1226.
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Abstract A preparation method of functionally gradient materials (FGM) by metal inert-gas (MIG) welding under magnetic field was proposed in this paper. Three dimensional finite element models of magnetic field, welding gun and metal specimen were built. Maxwell vortex field and instantaneous field were applied to simulate the preparation process with permanent magnetic field, alternating magnetic field and without magnetic field, and the simulation model was verified by the experiment. Simulation and experimental results show that in permanent magnetic field, the stirring of molten pool is weak, the FGM can not be prepared; under alternating magnetic field, the axial oscillating magnetic force and lateral extrusion magnetic force mix round the molten pool effectively, FGM can be prepared by MIG. Without magnetic field, the gradient of Al content in formed FGM is not obvious. Experimental results accord with simulation ones commendably.
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Received: 29 November 2010
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| Fund: Supported by National Natural Science Foundation of China (No.50875096) |
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