| Issue |
Rev. Met. Paris
Volume 89, Number 7-8, Juillet-Août 1992
|
|
|---|---|---|
| Page(s) | 627 - 634 | |
| DOI | https://doi.org/10.1051/metal/199289070627 | |
| Published online | 24 January 2017 | |
New evaluation of critical strain for internal crack formation in continuous casting*
Nouvelle évaluation de la contrainte critique de formation des criques internes en coulée continue
In order to determine the critical conditions for internal crack formation, tensile tests of cylindrical ingots with liquid core have been carried out. It was found that internal cracking occurred in the solid-fraction range between 0.99 and 0.80 corresponding to zero ductility temperature (ZDT) and zero strength temperature (ZST) respectively, only when strain given in this range exceeded critical value (1.6 %). This critical value was not influenced by strain rate and manner of deformation. At a lower strain rate, successive strain which exceeded the critical value between ZDT and ZST made the cracks longer with solidification progress. New evaluation of strain for internal crack formation in a continuous casting strand was found out.
© La Revue de Métallurgie 1992
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