Study of Hot Tearing During Steel Solidification Through Ingot Punching Test and Its Numerical Simulation

Abstract : Experimental and numerical studies of hot tearing formation in steel are reported. On the one hand, an ingot punching test is presented. It consists in the application of a deformation at the surface of a solidifying 450 kg steel ingot. The experimental parameters are the displacement of the pressing tool, together with its velocity, leading to variations of a global strain rate. On the other hand, three-dimensional finite element thermomechanical modeling of the test is used. The time evolution of the strain tensor serves to compute an index to evaluate the susceptibility to create hot tears. It is based on the integration of a hot tearing criterion (HTC) that compares the local accumulation of strain with the expression of a critical value proposed in the literature. The main variable of the criterion is the brittleness temperature range (BTR) that refers to the solidification interval during which strain accumulates and creates hot cracks or tears. Detailed comparison of the simulation results with the measurements reveals the importance of the BTR for the prediction as well as excellent capabilities of the HTC to predict the formation of hot tears.
Type de document :
Article dans une revue
Liste complète des métadonnées

https://hal-mines-paristech.archives-ouvertes.fr/hal-01354150
Contributeur : Magalie Prudon <>
Soumis le : mardi 3 janvier 2017 - 15:31:17
Dernière modification le : mercredi 13 février 2019 - 17:20:10
Document(s) archivé(s) le : mardi 4 avril 2017 - 14:24:17

Fichier

Koshikawa-et-al_MMTA2016 AV.pd...
Fichiers produits par l'(les) auteur(s)

Identifiants

Citation

Takao Koshikawa, Michel Bellet, Charles-André Gandin, Hideaki Yamamura, Manuel Bobadilla. Study of Hot Tearing During Steel Solidification Through Ingot Punching Test and Its Numerical Simulation. Metallurgical and Materials Transactions A, Springer Verlag/ASM International, 2016, 47 (8), pp.4053-4067. ⟨10.1007/s11661-016-3564-x⟩. ⟨hal-01354150⟩

Partager

Métriques

Consultations de la notice

395

Téléchargements de fichiers

515