Affiliation:
1. General Research Institute for Non-Ferrous Metals
2. University of Science and Technology Beijing
Abstract
According to semi-solid slurry rheological behavior, an apparent viscosity model of A356 alloy developed based on the Carreau model was established to simulate filling process of rheo-diecasting about automobile shock absorber parts and to compare with conventional liquid filling process. Numerical simulation results showed that the filling process of rheo-diecasting was smooth but difficult to splash, which reduced the tendency of the alloy oxidation and inclusion. Meanwhile, a certain percentage of the primary solid particles precipitated before filling and solidification shrinkage of semi-solid slurry were small. This benefited to reduce or eliminate shrinkage defects of the castings. Compared with conventional liquid die casting process, rheo-diecasting process had unique advantages in reducing the internal defects and improving mechanical properties of castings.
Publisher
Trans Tech Publications, Ltd.
Subject
Condensed Matter Physics,General Materials Science,Atomic and Molecular Physics, and Optics
Reference10 articles.
1. H.V. Atkinson, Modelling the semisolid processing of metallic alloys, Prog. Mater. Sci. 50 (2005) 341-412.
2. F. Zhang, Y.L. Kang, L.Q. Yang, etal. Taper barrel rheomoulding process for semi-solid slurry preparation and microstructure evolution of A356 aluminum alloy, T. Nonferr. Metal. Soc, 2010, 20(9): 1677-1684.
3. M. Perez, J.C. Barbé, Z. Neda, Y. Bréchet, L. Salvo, Computer simulation of the microstructure and rheology of semi-solid alloys under shear, Acta Mater. 48 (2000) 3773-3782.
4. Y.F. Zhang, Y.B. LIU, Z.Y. Cao, L. Zhang, Q.Q. Zhang, Numerical simulation and parameters optimization of thixomolded process for semisolid AZ91D magnesium alloy, Chin. J. Nonferr. Meta. 18 (2008) 703-709.
5. S.A. Sadough, M.R. Rahmani, V. Pouyafar, Rheological behavior, microstructure and hardness of A356 aluminum alloy in semisolid state using backward extrusion process, T. Nonferr. Metal. Soc. 20 (2010) s906-s910.
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