In the process of preparation of semi-solid metal materials, a variety of factors would influence the preparing time and the morphology of non-dendritic microstructure. The aim of this work is using phase-field method to simulate non-dendritic growth during preparation of Al-4Cu-Mg semi-solid alloy by electromagnetic stirring method (EMS method). Several factors such as the disturbance intensity, anisotropy, the thickness of the interface and the ratio of diffusivity in solid and liquid were considered. It is shown that decreasing the thickness of the interface results in more circular outline of particles, and increasing the diffusivity in solid can reduce degree of microsegregation. The disturbance intensity in the model can be connected with current intensity of stator or magnetic induction density impressed. Simulation results show that the larger the disturbance intensity or magnetic induction density, the more globular morphology the original phase in the matrix.
参考文献
| [1] | M C Flemings .[J].Metallurgical and Materials Transactions,1991,22B(06):269. |
| [2] | E. de Freitas;M. Ferrante;V. F. da Silva;W. Bose Filho;D. Spinelli .Thixoextrusion of an A356 alloy: microstructural studies and high temperature fatigue behaviour[J].Journal of Materials Processing Technology,2004(0):1629-1633. |
| [3] | W Howard .[J].Aluminum,1996,72(06):412. |
| [4] | J. PILLING;A. HELLAWELL .Mechanical Deformation of Dendrites by Fluid Flow[J].Metallurgical and Materials Transactions, A. Physical Metallurgy and Materials Science,1996(1):229-232. |
| [5] | P Kumar;C L Martin;S Brown .[J].Metallurgical and Materials Transactions,1993,24A:1107. |
| [6] | R. S. Qin;Z. Fan .Fractal theory study on morphological dependence of viscosity of semisolid slurries[J].Materials Science and Technology: MST: A publication of the Institute of Metals,2001(9):1149-1152. |
| [7] | Z. Fan;J. Y. Chen .Modelling of rheological behaviour of semisolid metal slurries[J].Materials Science and Technology: MST: A publication of the Institute of Metals,2002(3):258-267. |
| [8] | M Perez;J C Barbe;Z Neda;Y.Brehet L.Salvo .[J].Acta Materialia,2000,48:3773. |
| [9] | C L Matin;D Favier;M Suery .[J].International Journal of Plasticity,1997,13(03):215. |
| [10] | C Beckermann;H J Diepers;I Steinbach;A.Karma X.Tong .[J].Journal of Computational Physics,1999,154(02):468. |
| [11] | L Q Chen .[J].Annual Review of Materials Research,2002,32:113. |
| [12] | A A Wheeler;B T Murray;R J Schaefer .[J].Physical Review D,1993,66(01):243. |
| [13] | A Karma;W Rappel .[J].Physical Review Letters,1996,53:3017. |
| [14] | A Karma;W Rappel .[J].Physical Review E,1998,57:4323. |
| [15] | A A Wheeler;W J Boettinger;G B Mcfadden .[J].Physical Review E,1992,45:7424. |
| [16] | A A Wheeler;W J Boettinger;G B Mcfadden .[J].Physical Review E,1993,47:1893. |
| [17] | A. M. MULLIS;R. F. COCHRANE .A PHASE FIELD MODEL FOR SPONTANEOUS GRAIN REFINEMENT IN DEEPLY UNDERCOOLED METALLIC MELTS[J].Acta materialia,2001(12):2205-2214. |
| [18] | C Vievs .[J].Metallurgical and Materials Transactions,1992,23B:189. |
| [19] | R Kobsyasbi .[J].Physical Review D,1993,63(01):410. |
| [20] | Guangyue ZHANG;Tao JING;Baicheng LIU .[J].Chinese Journal of Mechanical Engineering(in Chinese),2003,39(05):6. |
| [21] | J A Warren;W J Boettinger .[J].Acta Materialia,1995,43(02):689. |
| [22] | D.FAN;L.-Q.CHEN .COMPUTER SIMULATION OF GRAIN GROWTH USING A CONTINUUM FIELD MODEL[J].Acta materialia,1997(2):611-622. |
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