The implication of rheology in semi-solid metal processes: An overview

Abstract The current article is to highlight the implication of rheology in semi-solid metal (SSM) processing. The effect of several process and metallurgical parameters, such as shear rate, shear time, holding time, pouring temperature, fraction solid of the primary phase and its morphology, size and distribution, on the apparent viscosity of the SSM alloys are reviewed and discussed. A variety of viscometry methods are introduced and the potential of typical routes in characterizing the microstructure and viscosity values of SSM slurries are given.

[1]  M. Flemings,et al.  Deformation of semi-solid Sn-15 Pct Pb alloy , 1980 .

[2]  Sang-yong Lee,et al.  Thixoforming characteristics of thermo-mechanically treated AA 6061 alloy for suspension parts of electric vehicles , 2002 .

[3]  M. Flemings,et al.  Rheology and microstructure of semi-solid aluminum alloys compressed in the drop-forge viscometer , 2002 .

[4]  Theo Z. Kattamis,et al.  Rheology of semisolid Al-4.5%Cu-1.5%Mg alloy , 1991 .

[5]  Sylvain Turenne,et al.  Mechanical behavior of aluminum matrix composite during extrusion in the semisolid state , 1999 .

[6]  D. H. Kirkwood,et al.  Semisolid metal processing , 1994 .

[7]  B. Straumal,et al.  Hypereutectic Al-Si based alloys with a thixotropic microstructure produced by ultrasonic treatment , 1997 .

[8]  Z. Fan,et al.  Semisolid metal processing , 2002 .

[9]  Dermot Brabazon,et al.  Experimental investigation of the transient and steady state rheological behaviour of Al–Si alloys in the mushy state , 2003 .

[10]  Herbert Leaderman,et al.  Viscosity and Flow Measurement , 1964 .

[11]  R. Ghomashchi,et al.  Microstructural characterization of rheo-cast billets prepared by variant pouring temperatures , 2006 .

[12]  Zhongyun Fan,et al.  Modelling of rheological behaviour of semisolid metal slurries Part 1 – Theory , 2002 .

[13]  Michael Modigell,et al.  Rheological modelling on semi-solid metal alloys and simulation of thixocasting processes , 2001 .

[14]  A. Zhao,et al.  Effect of pouring process on the microstructures of semi-solid AlSi7Mg alloy , 2009 .

[15]  A. Wahlen.  Modelling the Processing of Aluminium Alloys in the Semi-Solid State , 2002 .

[16]  R. Ghomashchi,et al.  A new machine to characterize microstructural evolution of semi-solid metal billets through viscometery , 2007 .

[17]  E. D. Freitas,et al.  Rheology and microstructural development of a Al–4wt%Cu alloy in the semi-solid state , 1999 .

[18]  RHEOLOGICAL STUDY OF PARTIALLY SOLIDIFIED TIN-LEAD AND ALUMINIUM-ZINC ALLOYS FOR STIR-CASTING , 1990 .

[19]  R. Ghomashchi,et al.  Rheological study of 356 Al-Si foundry alloy prepared by a new innovative SSM process , 2005 .

[20]  M. Shehata,et al.  Morphological evolution of SSM A356 during partial remelting , 2002 .

[21]  R. Ghomashchi,et al.  “The implication of rheological principles for characterization of semi-solid Al–Si cast billets” , 2006 .

[22]  Z. Fan,et al.  Modelling of rheological behaviour of semisolid metal slurries Part 2 – Steady state behaviour , 2002 .

[23]  M. Suery,et al.  Effect of Strain Rate on Deformation Behavior of Semi-Solid Dendritic Alloys , 1982 .

[24]  M. Flemings,et al.  Preparation and casting of metal-particulate non-metal composites , 1974 .

[25]  M. Hirai,et al.  Effect of Chemical Composition on Apparent Viscosity of Semi-solid Alloys , 1993 .

[26]  C. Kang,et al.  A study on a thixoforming process using the thixotropic behavior of an aluminum alloy with an equiaxed microstructure , 2000 .

[27]  M. Flemings,et al.  Rheological behavior of Sn-15 pct Pb in the crystallization range , 1972 .

[28]  D. Doutre,et al.  SEED: A NEW PROCESS FOR SEMI-SOLID FORMING , 2004 .

[29]  D. Brabazon,et al.  Mechanical stir casting of aluminium alloys from the mushy state: process, microstructure and mechanical properties , 2002 .

[30]  G. H. Geiger,et al.  Transport Phenomena in Materials Processing , 1998 .

[31]  J. Y. Chen,et al.  Modelling of rheological behaviour of semisolid metal slurries Part 4 – Effects of particle morphology , 2002 .

[32]  Y. Jing,et al.  The rheological behavior for thixocasting of semi-solid aluminum alloy (A356) , 2002 .

[33]  E. Essadiqi,et al.  Macro- and microstructure analysis of SSM A356 produced by electromagnetic stirring , 2002 .

[34]  Yung-Jin Kim,et al.  Electromagnetic stirring and Sr modification in A356 alloy , 2001 .