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Laboratory experiments on press hardened steels in different delivered states exposed to hydrogen

  • The legal and economical demands in the automotive industry lead to increasing efforts reducing the CO2 emissions. A way to achieve that goal is to reduce the total weight of the car and therefore the fuel consumption. With the application of high strength steels in car body manufacturing it is possible to decrease the sheet thickness of the used materials and therefore the weight of the automobile. Components made of high strength steels can be produced by cold forming as well as by hot forming. In high strength steel the hydrogen content plays a crucial role for the component behavior. It is known that the hydrogen diffusivity and solubility are based on several factors, for example increasing dislocation density by cold working processes, vacancies, chemical composition and grain boundaries. The understanding and the control of the interaction between hydrogen and the high strength press hardened steels is an important factor for the application of the materials. The scope of thisThe legal and economical demands in the automotive industry lead to increasing efforts reducing the CO2 emissions. A way to achieve that goal is to reduce the total weight of the car and therefore the fuel consumption. With the application of high strength steels in car body manufacturing it is possible to decrease the sheet thickness of the used materials and therefore the weight of the automobile. Components made of high strength steels can be produced by cold forming as well as by hot forming. In high strength steel the hydrogen content plays a crucial role for the component behavior. It is known that the hydrogen diffusivity and solubility are based on several factors, for example increasing dislocation density by cold working processes, vacancies, chemical composition and grain boundaries. The understanding and the control of the interaction between hydrogen and the high strength press hardened steels is an important factor for the application of the materials. The scope of this work is the determination of hydrogen diffusion and permeability kinetics in press hardened steel samples. An electrochemical hydrogen permeation method was applied on boron-manganese steel grades with different rolling reduction in initial ferrite/pearlite matrix as well as for the as-quenched martensite microstructure. The diffusible hydrogen contents of the specimens were measured using the carrier gas hot extraction technique (CGHE).zeige mehrzeige weniger

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Metadaten
Autor*innen:S. Weczera, Michael RhodeORCiD, C. Sunderkoetter, A. Plath, S. Jüttner
Dokumenttyp:Beitrag zu einem Tagungsband
Veröffentlichungsform:Verlagsliteratur
Sprache:Englisch
Titel des übergeordneten Werkes (Englisch):CHS2 2015 - 5th International conference on hot sheet metal forming of high-performance steel (Proceedings)
Jahr der Erstveröffentlichung:2015
Verlag:Verlag Wissenschaftliche Scripten
Verlagsort:Auerbach, Germany
Jahrgang/Band:5
Erste Seite:45
Letzte Seite:54
Freie Schlagwörter:22MnB5; Automotive; Carrier gas hot extraction; High strength steel; Hydrogen; Martensite; Measurement; Permeation; Press-hardened
Veranstaltung:CHS2 2015 - 5th International conference on hot sheet metal forming of high-performance steel
Veranstaltungsort:Toronto, Ontario, Canada
Beginndatum der Veranstaltung:31.05.2015
Enddatum der Veranstaltung:03.06.2015
Verfügbarkeit des Dokuments:Datei im Netzwerk der BAM verfügbar ("Closed Access")
Datum der Freischaltung:20.02.2016
Referierte Publikation:Ja
Datum der Eintragung als referierte Publikation:22.06.2015
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