| EPSRC Reference: |
GR/L70042/01 |
| Title: |
MESOSCOPIC MODELLING OF THE INTERACTION OF EQUIAXED GRAINS AND POROSITY DURING THE SOLIDIFICATION OF METALS |
| Principal Investigator: |
Lee, Professor P |
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| Department: |
Materials |
| Organisation: |
Imperial College London |
| Scheme: |
Standard Research (Pre-FEC) |
| Starts: |
22 June 1998 |
Ends: |
21 June 2001 |
Value (£): |
53,304
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| Transport Systems and Vehicles |
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Summary on Grant Application Form |
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The use of metals in the as-cast state offers important economic advantages in reduced production steps and the ability to produce complex shapes, however, porosity is one of the major limitations of the casting process reducing materials performance below acceptable levels.The principal scientific aim of the research is to develop a flexible and validated model of the formation of porosity during the equiaxed solidification of metals. The study will combine existing cellular automata models of equiaxed grain nucleation and growth with mesoscopic models of hydrogen diffusion limited pore growth. The mesoscopic model will be coupled into a macroscopic CFD code to simulate solidification shrinkage. This multi-scale model will be validated against experimental results from in situ observation of pore growth in a developing microstructure. The large variation in length scales between the mesoscopic model and macroscopic models makes direct application of the multi-scale modelling to industrial problems computationally prohibitive, therefore the model will be used to develop a simpler constitutive model of pore formation for inclusion in commercial CFD codes. With the continued growth in the computational speed of computers, it is hoped that the directly coupled multi-scale modelling may be applied industrially early in the next millennium.
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Key Findings |
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Potential use in non-academic contexts |
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Impacts |
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| Description |
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Sectors submitted by the Researcher |
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This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
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| Project URL: |
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| Further Information: |
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| Organisation Website: |
http://www.imperial.ac.uk |