On the role of impurities on spheroidal graphite degeneracy in cast irons - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Carbon Année : 2021

On the role of impurities on spheroidal graphite degeneracy in cast irons

Résumé

Though manufacturing spheroidal graphite cast irons is a well-established industrial process, good nodularity which is essential for mechanical properties may be hampered by several factors. Amongst them is the presence of impurities at trace level which lead to the growth of protrusions and the question is how they can destroy the spheroidizing effect of magnesium. For the first time, it is shown that such impurities are present together with magnesium at the interface between spheroid and protrusion. For getting this result, site-specific electron transparent lamellae were prepared using Focused Ion Beam and characterized at nanometric scale using atomic resolution scanning-transmission electron microscope. It is also shown by automatic crystal orientation mapping that there is no definite crystallographic relationship between protrusions and underlying spheroids.
Fichier principal
Vignette du fichier
Domenges_27589.pdf (6.46 Mo) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)

Dates et versions

hal-03182250 , version 1 (24-10-2020)
hal-03182250 , version 2 (26-03-2021)

Identifiants

Citer

Bernadette Domengès, Mayerling Martinez Celis, Florent Moisy, Jacques Lacaze, Babette Tonn. On the role of impurities on spheroidal graphite degeneracy in cast irons. Carbon, 2021, 172, pp.529-541. ⟨10.1016/J.CARBON.2020.10.030⟩. ⟨hal-03182250v2⟩
155 Consultations
102 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More