| Autor: |
Itaru Jimbo, Toshio Suzuki, Hiroaki Fujino |
| Rok vydání: |
1997 |
| Předmět: |
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| Zdroj: |
ISIJ International. 37:1107-1111 |
| ISSN: |
0915-1559 |
| DOI: |
10.2355/isijinternational.37.1107 |
| Popis: |
Cooling rate dependence of the degree of undercooling at the onset of solidification for 18Cr-8Ni stainless steel was numerically analyzed using a classical nucleation theory. Transient time which can characterize the time-dependent behavior of nucleation was evaluated for iron. It is shown that temperature change in the experiment is slow enough against the transient time and no time-dependent behavior can be expected within the predictions by the classical theory. A new model for time-dependent contact angle was proposed so as to reproduce the cooling rate dependence of the degree of undercooling. This prediction model shows a good agreement with the experimental result for 1 8Cr-8Ni stainless steel. The effect of substrate temperature on the degree of undercooling and the primary nucleation phase of 18Cr-8Ni stainless steel was also discussed using the model. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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