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Reversed austenite for enhancing ductility of martensitic stainless steel

  • The novel heat treatment concept, “quenching and partitioning” (Q&P) has been developed for high strength steels with enhanced formability. This heat treatment involves quenching of austenite to a temperature between martensite start and finish, to receive a several amount of retained austenite. During the subsequent annealing treatment, the so called partitioning, the retained austenite is stabilized due to carbon diffusion, which results in enhanced formability and strength regarding strain induced austenite to martensite transformation. In this study a Q&P heat treatment was applied to a Fe-0.45C-0.65Mn-0.34Si-13.95Cr stainless martensite. Thereby the initial quench end temperature and the partitioning time were varied to characterize their influence on microstructural evolution. The microstructural changes were analysed by dilatometer measurements, X-ray diffraction and scanning electron microscopy, including electron backscatter diffraction. Compression testing was made to examineThe novel heat treatment concept, “quenching and partitioning” (Q&P) has been developed for high strength steels with enhanced formability. This heat treatment involves quenching of austenite to a temperature between martensite start and finish, to receive a several amount of retained austenite. During the subsequent annealing treatment, the so called partitioning, the retained austenite is stabilized due to carbon diffusion, which results in enhanced formability and strength regarding strain induced austenite to martensite transformation. In this study a Q&P heat treatment was applied to a Fe-0.45C-0.65Mn-0.34Si-13.95Cr stainless martensite. Thereby the initial quench end temperature and the partitioning time were varied to characterize their influence on microstructural evolution. The microstructural changes were analysed by dilatometer measurements, X-ray diffraction and scanning electron microscopy, including electron backscatter diffraction. Compression testing was made to examine the mechanical behaviour. It was found that an increasing partitioning time up to 30 min leads to an enhanced formability without loss in strength due to a higher amount of stabilized retained and reversed austenite as well as precipitation hardening.zeige mehrzeige weniger

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Metadaten
Autor*innen:S. Dieck, Paul Rosemann, Arne KrommORCiD, T. Halle
Dokumenttyp:Zeitschriftenartikel
Veröffentlichungsform:Verlagsliteratur
Sprache:Englisch
Titel des übergeordneten Werkes (Englisch):IOP Conf. Series: Materials Science and Engineering
Jahr der Erstveröffentlichung:2017
Veröffentlichende Institution:Bundesanstalt für Materialforschung und -prüfung (BAM)
Verlag:IOP Publishing
Verlagsort:Bristol, UK
Jahrgang/Band:181
Ausgabe/Heft:Conference 1
Erste Seite:Article UNSP 012034, 1
Letzte Seite:8
DDC-Klassifikation:Technik, Medizin, angewandte Wissenschaften / Ingenieurwissenschaften / Ingenieurwissenschaften und zugeordnete Tätigkeiten
Freie Schlagwörter:Heat treatment; High ductility; Martensitic stainless steels; Quenching and partitioning; Transformation induced plasticity
Veranstaltung:19th Chemnitz Seminar on Materials Engineering – 19. Werkstofftechnisches Kolloquium
Veranstaltungsort:Chemnitz, Germany
Beginndatum der Veranstaltung:16.03.2017
Enddatum der Veranstaltung:17.03.2017
DOI:10.1088/1757-899X/181/1/012034
URN:urn:nbn:de:kobv:b43-395328
ISSN:1757-899X
ISSN:1757-8981
Verfügbarkeit des Dokuments:Datei für die Öffentlichkeit verfügbar ("Open Access")
Lizenz (Deutsch):License LogoCreative Commons - Namensnennung
Datum der Freischaltung:24.03.2017
Referierte Publikation:Ja
Datum der Eintragung als referierte Publikation:29.05.2017
Schriftenreihen ohne Nummerierung:Wissenschaftliche Artikel der BAM
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