Numerical simulation of macrostructure formation in centrifugal casting of particle reinforced metal matrix composites. Part 1: model description

Abstract

This paper discusses the processing, modelling and macrostructure management of centrifugally cast particle reinforced metal matrix composites (MMCs). Centrifugal casting is a widely applied method for production of graded MMCs. A three-dimensional comprehensive mathematical model coupling particle movement and thermal conduction in the casting/mould system is developed. A formula for pressure in liquid metal during the centrifuge process is derived. The influence of Coriolis force on particle movement is discussed in detail.

Simulation study on the centrifugal casting wet-type cylinder liner based on ProCAST

“…In this case, a mass acceleration field, a z ¼ g, is applied to each point of the liquid (Fig. 3) [18]. After the metallic melt contacts the revolution mold, the metallic melt moves with the revolution mold; the flow behavior of the metallic melt then changes to centrifugal casting.…”

Heat Transfer Coefficient at Cast-Mold Interface During Centrifugal Casting: Calculation of Air Gap

“…A similar approach was adopted by Lajoye and Suery [28] and was later widely used by other authors such as Raju and Mehrotra, [29] Drenchev et al, [30] Panda et al [31] Instead of the heat flux, a time-dependent heat transfer coefficient h was considered at the interface and defined by the following formula:…”

“…Lagerstedt, a colleague of Kron, pointed out in the future work chapter of his doctoral thesis [43] that including plasticity in the stress model probably should be the next step in developing an accurate shrinkage model. Xu et al [18] perfect contact Gao and Wang [19] perfect contact Cook et al [20] perfect contact Bohacek et al [21] perfect contact Humphreys et al [22] not available Chang et al [23] constant 1000 to 2600 Kang et al, [24] Kang and Rohatgi [25] constant 1000 Ebisu [26] variable not available Kamlesh [27] variable not available Lajoye and Suery [28] variable 400 to 80,000 (1/10)* Raju and Mehrotra [29] variable 100 to 10,000 (1/10) Drenchev et al [30] variable 420 to 84,000 (1/10) Panda et al [31] variable 50 to 5000 (1/10) Nastac [32] variable 90 to 6000 (3/100) Vacca et al [33] variable (exp.) 50 to 870 (6/100) *h f /h 0 ratio.…”

An approximate Riemann solver for shallow water equations and heat advection in horizontal centrifugal casting

“…The main object of consideration is a time dependent thickness of the solidifying shell often influenced by a segregation of some element due to a density difference and extremely high centrifugal pressure. For example in [6], Drenchev introduced a numerical model discussing some aspects of macrosegregation of reinforcing particles in a metal matrix. The enthalpy equation was the primary equation to solve with thermal physical properties determined from the segregation model.…”