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

Result code in 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>

Result on the web

<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>

Result language

angličtina

Original language name

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

Original language description

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.

Czech name

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Czech description

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Type

D - Article in proceedings

CEP classification

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OECD FORD branch

20500 - Materials engineering

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

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

Publication year

2019

Confidentiality

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

Article name in the collection

IOP Conference Series: Materials Science and Engineering. Volume 668

ISBN

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ISSN

1757-8981

e-ISSN

1757-899X

Number of pages

7

Pages from-to

1-7

Publisher name

IOP Publishing

Place of publication

Bristol

Event location

Peking

Event date

Aug 19, 2019

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

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