| Autor: |
Frazier, W. G., Malas, J. C., Medina, E. A., Medeiros, S., Venugopal, S., Mullins, W. M., Chaudhary, A., Irwin, R. D. |
| Zdroj: |
Materials Science & Technology; January 1998, Vol. 14 Issue: 1 p25-31, 7p |
| Abstrakt: |
Modern control theory has been applied to the optimisation of microstructure development during hot extrusion. This approach involves state space type models for describing the material behaviour and the mechanics of the process. The problem of determining process control parameters such as strain, strain rate, and temperature to obtain prespecified microstructural features can be systematically formulated in terms of an optimal control problem. This method has been applied to the optimisation of grain size and certain process parameters such as die geometry and ram velocity during extrusion of plain carbon steel. Experimental results of this investigation show good agreement with those predicted in the design stage. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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