Abstract
Investment and suction casting (ISC) represents an economic and promising process route to fabricate automotive exhaust valves of γ-TiAl based alloys, but information available on the metal flow and the temperature changes during mould filling and solidification process for the ISC process is meager. A sequentially coupled mathematical flow-thermal model, based on the commercial finite-volume/finite-difference code FLOW-3D and the finite-element code PROCAST, has been developed to investigate the ISC process. In term of calculating the flow and temperature fields during the filling and solidification stages, potential defects including the gas bubbles and the surface air entrainment occurred in the mould filling process and the shrinkage porosities formed in the solidification process are predicted and the reasons for the formation of these defects are also analyzed. The effects of filling pressure difference control methods and moulds on gas bubble and surface air entrainment behavior are presented. It is found that by changing the filling pressure difference control methods from general suction casting to “air leakage” suction casting and reducing air leakage flow rates, the gas bubbles are eliminated effectively, and the surface air entrainment attenuate dramatically. With resort to a mould with a tetragonal runner, the surface air entrainment decrease to the lowest level. Finally, the water analogue and suction casting experiments of exhaust valves are implemented for further validation of the simulation results.
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References
K. Gebauer, Intermetallics, 14 (2006) 355.
W.E. Dowling, W.T. Donlon and J.E. Allison, in: I. Baker, S. Hanada, J. Horton, R.D. Noebe and D.S. Schwartz (Eds.), High-Temperature Ordered Intermetallic Alloys VI: Vol. 364 (MRS Proceedings), Materials Research Society, Pittsburgh, PA, 1995, pp.757.
A.W. Sommer and G.C. Keijzers, in: Y.W. Kim, H. Clemens, and A.H. Rosenberger (Eds.) Gamma Titanium Aluminides 2003, TMS, Warrendale, PA, 2003, p.3.
S.E. HartfieldWunsch, A.A. Sperling, R.S. Morrison, W.E. Dowling and J.E. Allison, in: F. Appel, J.D.H. Paul, M. Oehring, Gamma Titanium Aluminides, Wiley-VCH, San Francisco, CA, 1995, p.41.
Y.W. Kim and D.M. Dimiduk, JOM 43 (1991) 40.
F. Appel and R. Wagner, Mater. Sci. Eng. R 22 (1998) 187.
H. Clemens and H. Kestler, Adv. Eng. Mater. 2 (2000) 551.
M. Nazmy, C. Noseda, M. Staubli and B. Phillipsen, in: R.H. Jones and N.S Stoloff (Eds.), Processing and Design Issues in High Temperature Materials, TMS, Warrendale, PA, 1996, p.159.
W. Smarsly, H. Baur, G. Glitz, H. Clemens, T. Khan and M. Thomas, in: K. J. Hemker, Minerals Metals and Materials Society Structural Materials Division, International Symposium on Structural Intermetallics 2001 Jackson Hol (Eds.), Structural Intermetallics 2001, third ed., TMS, Warrendale, PA, 2001, p.25.
G.D. Chandley, AFS Trans. 84 (1976) 37.
G.D. Chandley and D.L. Cargill, AFS Trans. 98 (1990) 413.
S. Kashiwai, I. Ohnaka, A. Kimatsuka, T. Kaneyoshi, T. Ohmichi and J. Zhu, Int. J. Cast Met. Res. 18 (2005) 144.
S.R. Giese and L. Dix, AFS Trans. 107 (1999) 217.
L. Yuan, J. Yang, S.M. Xiong and B.C. Liu, Int. J. Cast Met. Res. 21 (2008) 401.
P.X. Fu, X.H. Kang, Y.C. Ma, K. Liu, D.Z. Li and Y.Y. Li, Intermetallics 16 (2008) 130.
Y.C. Wang, D.Y. Li, Y.H. Peng and X.Q. Zeng, Int. J. Adv. Manuf. Technol. 32 (2007) 257.
M.R. Barkhudarov and C.W. Hirt, in: M. Cross, J Campbell and J.E. Campell (Eds.), Modeling of Casting, Welding and Advanced Solidification Processes VII, TMS, Warrendale, PA, 1995, p.935.
A.H.G. Isfahani and J.M. Brethour, The Fluid-Structure Interaction and Thermal Stress Evolution Models in FLOW-3D, Flow Science, Inc., 2009.
M.C. Carter, S. Palit and M. Littler, CastExpo’ 10, NADCA, Orlando, Florida, 2010.
T. Yoshimura, K. Yano, T. Fukui, S. Yamamoto, S. Nishido, M. Watanabe and Y. Nemoto, Proceedings of 10th Asian Foundry Congress, Nagoya, Japan, 2008.
J.H. Kuo and W.S. Hwang, Modell. Simul. Mater. Sci. Eng. 8 (2000) 583.
C. Xiong, Y.C. Ma, B. Chen, K. Liu and Y.Y. Li, Acta Metall. Sin. 47 (2011) 1408. (in Chinese)
P. Kobryn and S. Semiatin, Metall. Mater. Trans. B 32 (2001) 685.
L. Biasetto, M. Manzolaro and A. Andrighetto, Eur. Phys. J. A 38 (2008) 167.
D.J. Browne and K. Sayers, in: M. Cross, J. Campbell and J.E. Campell (Eds.), Modeling of Casting, Welding and Advanced Solidification Processes VII, TMS, Warrendale, PA, 1995, p.441.
D.J. Browne and D. O’Mahoney, Metall. Mater. Trans. A 32 (2001) 3055.
C.D. Anderson, W.H. Hofmeister and R.J. Bayuzick, Metall. Trans. A 24 (1993) 61.
A.S. Sabau, Int. J. Cast Met. Res. 19 (2006) 188.
W.M. Gao, L.X. Kong and P.D. Hodgson, 9th International Conference on Metal Forming (Metal Forming 2002), Birmingham, England, 2002, p.170.
K.C. Mills, Recommended values of thermophysical properties for selected commercial alloys, Woodhead publishing Ltd and ASM International, Cambridge, England, 2002, p.132.
P.F. Paradis, T. Ishikawa and S. Yoda, Int. J. Thermophys. 23 (2002) 825.
C. Cagran, B. Wilthan, G. Pottlacher, B. Roebuck, M. Wickins and R.A. Harding, Intermetallics 11 (2003) 1327.
R.A. Harding, R.F. Brooks, G. Pottlacher and J. Brillo, in: Y.W. Kim, H. Clemens, and A.H. Rosenberger (Eds.) Gamma Titanium Aluminides 2003, TMS, Warrendale, PA, 2003, p.75.
I. Egry, R. Brooks, D. Holland-Moritz, R. Novakovic, T. Matsushita, E. Ricci, S. Seetharaman, R. Wunderlich and D. Jarvis, Int. J. Thermophys. 28 (2007) 1026.
D. Au, S. Cockcroft and D. Maijer, Metall. Mater. Trans. A 33 (2002) 2053.
K. Heames and G.H. Geiger, Proceedings of the 26th Annual Technical Meeting of the Investment Casting Institute, USA, 1978, 5d:1.
H. Saari, D.Y. Seo, J. Blumm and J. Beddoes, J. Therm. Anal. Calorim. 73 (2003) 381.
C. Pequet, M. Gremaud and M. Rappaz, Metall. Mater. Trans. A 33 (2002) 2095.
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Xiong, C., Ma, Y., Chen, B. et al. Modeling of filling and solidification process for TiAl exhaust valves during suction casting. ACTA METALL SIN 26, 33–48 (2013). https://doi.org/10.1007/s40195-011-0503-0
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DOI: https://doi.org/10.1007/s40195-011-0503-0