Formation and decomposition of Widmanstätten austenite in GOES belt-casted strips

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27360%2F19%3A10243653" target="_blank" >RIV/61989100:27360/19:10243653 - isvavai.cz</a>

Výsledek na webu

<a href="https://iopscience.iop.org/article/10.1088/1757-899X/668/1/012016/pdf" target="_blank" >https://iopscience.iop.org/article/10.1088/1757-899X/668/1/012016/pdf</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1088/1757-899X/668/1/012016" target="_blank" >10.1088/1757-899X/668/1/012016</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Formation and decomposition of Widmanstätten austenite in GOES belt-casted strips

Popis výsledku v původním jazyce

This contribution deals with the formation and decomposition of Widmanstätten austenite during solidification of the thin belt-casted strips made of a grain oriented electrical steel (GOES). Solidification of liquid steel started with the formation of delta-ferrite. Cooling in the delta + gama phase field resulted in the formation of a small fraction of Widmanstätten austenite by displacive mechanism accompanied by carbon partition. Widmanstätten austenite laths formed flat low energy interface facets along ferrite grain boundaries. In order to minimize the interfacial energy, ferrite grain boundaries in the vicinity of flat austenite/ferrite facets migrated. It resulted in the formation of either straight or zig-zag ferrite boundaries. Intensive precipitation of sulphides along ferrite/austenite interfaces made it possible to study the early stages of austenite decomposition at the end of the delta + gama phase field. Complex sulphides containing chromium, manganese, iron and copper were identified as the Cr2CuS4 phase. Decomposition of austenite started with the formation of epitaxial ferrite. This was accompanied by further partitioning of carbon into remaining austenite. The growth of epitaxial ferrite into the flat ferrite/austenite interface facets along ferrite grain boundaries resulted in a wavy shape of these boundaries. Finally, remaining carbon rich austenite transformed either to pearlite or plate martensite.

Název v anglickém jazyce

Formation and decomposition of Widmanstätten austenite in GOES belt-casted strips

Popis výsledku anglicky

This contribution deals with the formation and decomposition of Widmanstätten austenite during solidification of the thin belt-casted strips made of a grain oriented electrical steel (GOES). Solidification of liquid steel started with the formation of delta-ferrite. Cooling in the delta + gama phase field resulted in the formation of a small fraction of Widmanstätten austenite by displacive mechanism accompanied by carbon partition. Widmanstätten austenite laths formed flat low energy interface facets along ferrite grain boundaries. In order to minimize the interfacial energy, ferrite grain boundaries in the vicinity of flat austenite/ferrite facets migrated. It resulted in the formation of either straight or zig-zag ferrite boundaries. Intensive precipitation of sulphides along ferrite/austenite interfaces made it possible to study the early stages of austenite decomposition at the end of the delta + gama phase field. Complex sulphides containing chromium, manganese, iron and copper were identified as the Cr2CuS4 phase. Decomposition of austenite started with the formation of epitaxial ferrite. This was accompanied by further partitioning of carbon into remaining austenite. The growth of epitaxial ferrite into the flat ferrite/austenite interface facets along ferrite grain boundaries resulted in a wavy shape of these boundaries. Finally, remaining carbon rich austenite transformed either to pearlite or plate martensite.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

20500 - Materials engineering

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2019

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

IOP Conference Series: Materials Science and Engineering. Volume 668

ISBN

—

ISSN

1757-8981

e-ISSN

1757-899X

Počet stran výsledku

7

Strana od-do

1-7

Název nakladatele

IOP Publishing

Místo vydání

Bristol

Místo konání akce

Peking

Datum konání akce

19. 8. 2019

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

—