The effect of the gate shape on the microstructural characteristic of the grain size of Al–Si alloy in the semi-solid die casting process
作者： P.K. Seo , D.U. Kim , C.G. Kang
DOI: 10.1016/J.MSEA.2006.06.133
关键词:
摘要: Abstract Semi-solid forming is an attractive process for fabricating sound, weight-reduced automotive parts. Therefore, in this work, die systems of varied gate shape, width, and thickness were designed to investigate the filling characteristics semi-solid material with a controlled solid fraction. When materials fraction 50% filled inside cavity, causes liquid segregation according separation phenomena particles investigated. The parts characterized eutectic segregation, band, cracks shrinkage hole on part surface. It was found that all these defects could be solved by selection optimal casting speed shape when completely cavity. correlation between system has been synthetically investigated experimental results theoretical results. hardness primary α zone eutectics microstructural measured nano indentation. relationship also
elsevier.com
sci-hub.se 参考文章(10)
N.S. Kim, C.G. Kang, An investigation of flow characteristics considering the effect of viscosity variation in the thixoforming process Journal of Materials Processing Technology. ,vol. 103, pp. 237- 246 ,(2000) , 10.1016/S0924-0136(99)00441-0
Z. Yang, C.G. Kang, P.K. Seo, Evolution of the rheocasting structure of A356 alloy investigated by large-scale crystal orientation observation Scripta Materialia. ,vol. 52, pp. 283- 288 ,(2005) , 10.1016/J.SCRIPTAMAT.2004.10.015
Jae-Chul Lee, Hyun-Kwang Seok, Ho-In Lee, Effect of the gate geometry and the injection speed on the flow behaviors of a semi-solid A356 Al alloy Metals and Materials International. ,vol. 9, pp. 351- 357 ,(2003) , 10.1007/BF03027187
H. K. Jung, C. G. Kang, An induction heating process with coil design and solutions avoiding coarsening phenomena of Al-6 Pct Si-3 Pct Cu-0.3 Pct Mg alloy for thixoforming Metallurgical and Materials Transactions A. ,vol. 30, pp. 2967- 2977 ,(1999) , 10.1007/S11661-999-0134-5
P Kapranos, P.J Ward, H.V Atkinson, D.H Kirkwood, Near net shaping by semi-solid metal processing Materials & Design. ,vol. 21, pp. 387- 394 ,(2000) , 10.1016/S0261-3069(99)00077-1
Z. Fan, Semisolid metal processing International Materials Reviews. ,vol. 47, pp. 49- 85 ,(2002) , 10.1179/095066001225001076
Merton C. Flemings, Behavior of metal alloys in the semisolid state Metallurgical and Materials Transactions B-process Metallurgy and Materials Processing Science. ,vol. 22, pp. 269- 293 ,(1991) , 10.1007/BF02661090
D. H. Kirkwood, Semisolid metal processing International Materials Reviews. ,vol. 39, pp. 173- 189 ,(1994) , 10.1179/IMR.1994.39.5.173
C. G. Kang, H. K. Jung, Semisolid forming process—numerical simulation and experimental study Metallurgical and Materials Transactions B-process Metallurgy and Materials Processing Science. ,vol. 32, pp. 363- 371 ,(2001) , 10.1007/S11663-001-0059-X
C.G Kang, Y.J Jung, S.W Youn, Horizontal reheating of aluminum alloys and semi-solid casting for a near net shape compressor component Journal of Materials Processing Technology. ,vol. 135, pp. 158- 171 ,(2003) , 10.1016/S0924-0136(02)00871-3