Modeling of solidification in near net shape continuous casting /
The adoption of near net shape casting technology in
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| Format: | Thesis Book |
| Language: | English |
| Published: |
[Place of publication not identified] :
[publisher not identified] ;
1995.
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| Online Access: | http://proxy.library.tamu.edu/login?url=http://proquest.umi.com/pqdweb?did=742164401&sid=1&Fmt=2&clientId=2945&RQT=309&VName=PQD |
| Summary: | The adoption of near net shape casting technology in continuous casting is intended for the improvement of productivity, optimal energy usage and reduced costs. Its success is dictated by the cast product quality. The product quality is governed by the as cast properties which are a consequence of the microstructure developed during the solidification process. Therefore, the prediction of microstructure becomes crucial in near net shape casting. The present research deals with the development of a process model to predict the temperature profiles and microstructure during the solidification process. The process model consists of macroscopic and microscopic parts. The macroscopic part of the process model utilizes the finite element method to solve the governing heat conduction equation to obtain temperature profiles. The microscopic part of the process model is made of a solute diffusion model and a dendrite growth model. The incorporation of the microscopic phenomena such as solid fraction formation, undercooling and the dendrite growth from the microscopic model into macroscopic heat flow calculations will facilitate in the prediction the microstructure during solidification on a system scale. The model was applied to continuous casting of steel billets and near net shape beam blanks. The temperature profiles and microstructure were predicted during solidification along with the dendrite tip undercooling, recalescence and local solidification time. The predicted secondary dendrite arm spacings correlated reasonably well with the dendrite arm spacings measured from actual steel samples. With this model as a basis, further research could lead to a comprehensive model capable of realistic prediction and monitoring of solidification in continuous casting. |
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| Item Description: | Vita. "Major Subject: Interdisciplinary Engineering". |
| Physical Description: | xv, 239 leaves : illustrations ; 28 cm. Issued also on microfiche from University Microfilms Inc. |
| Bibliography: | Includes bibliographical references. |