Modeling Hot Tearing during Solidification of Steels: Assessment and Improvement of Macroscopic Criteria through the Analysis of Two Experimental Tests - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Metallurgical and Materials Transactions A Année : 2009

Modeling Hot Tearing during Solidification of Steels: Assessment and Improvement of Macroscopic Criteria through the Analysis of Two Experimental Tests

(1) , (1) , (2) , (1)
1
2

Résumé

Hot tearing is an unacceptable defect found in products and parts obtained by solidification processes such as ingot and continuous casting. It consists of the development of cracks during solidification, in regions that are not completely solidified, more precisely, in areas of mushy zones with a high fraction of solid (typically 0.9 and beyond), when the material undergoes deformations associated with tensile stress. In this study, two hot tearing tests have been studied in order to evaluate the predictive capability of several macroscopic criteria published in the literature. The first test is a new test specifically designed for constrained shrinkage by the present authors, while the second test is an ingot bending test developed in the 1980s. For both tests, a thermal-mechanical analysis is performed, in order to provide the key variables for the different selected criteria. A comparison with experimental results allows us to make a critical assessment of those criteria regarding their ability to predict crack occurrence. The criterion initially proposed by Won et al.[7] has been found to be the best suited for the prediction of solidification cracking. Because this criterion is essentially based on the "brittle temperature range," (BTR) critical considerations regarding nonequilibrium solidification have led to suggest an extension of this criterion. This new macroscopic criterion improves the prediction capacity.
Fichier principal
Vignette du fichier
Bellet_et_al_HotTearingCriteria_MMTA2009.pdf (214.97 Ko) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)

Dates et versions

hal-00487265 , version 1 (09-03-2011)

Identifiants

Citer

Michel Bellet, Olivier Cerri, M. Bobadilla, Yvan Chastel. Modeling Hot Tearing during Solidification of Steels: Assessment and Improvement of Macroscopic Criteria through the Analysis of Two Experimental Tests. Metallurgical and Materials Transactions A, 2009, 40 (11), pp.Pages 2705-2717. ⟨10.1007/s11661-009-9955-5⟩. ⟨hal-00487265⟩
128 Consultations
859 Téléchargements

Altmetric

Partager

Gmail Facebook Twitter LinkedIn More