KIT | KIT-Bibliothek | Impressum | Datenschutz

Carbon Redistribution Process in Austempered Ductile Iron (ADI) During Heat Treatment—APT and Synchrotron Diffraction Study

Li, Xiaohu; Wagner, Julia N.; Stark, Andreas; Koos, Robert; Landesberger, Martin; Hofmann, Michael; Fan, Guohua; Gan, Weimin; Petry, Winfried

Abstract:
In-situ synchrotron diffraction and atom probe tomography (APT) have been used to study the carbon diffusion and redistribution process in austempered ductile iron (ADI) during austempering. The process of carbon content change in bainitic ferrite during different austempering temperatures has been determined quantitatively. The transformation in ADI is controlled by decarburization of supersaturated ferrite and carbide precipitation and has been found to be divided into three stages based on a model developed for bainitic steels by Takahashi and Bhadeshia. The formation, morphology and composition of carbides and carbon clusters in ferrite after austempering have been identified unequivocally by APT. Finally, the relationships of carbon content in ferrite, carbon gap values, and austempering temperatures in the ADI alloy were expressed using empirical equations.

Open Access Logo


Verlagsausgabe §
DOI: 10.5445/IR/1000099640
Veröffentlicht am 06.11.2019
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Angewandte Materialien - Werkstoffkunde (IAM-WK)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2019
Sprache Englisch
Identifikator ISSN: 2075-4701
KITopen-ID: 1000099640
Erschienen in Metals
Verlag MDPI
Band 9
Heft 7
Seiten Art. Nr.: 789
Vorab online veröffentlicht am 16.07.2019
Schlagwörter ADI, synchrotron diffraction, APT, carbon gap, carbide
Nachgewiesen in Scopus
Web of Science
KIT – Die Forschungsuniversität in der Helmholtz-Gemeinschaft
KITopen Landing Page