Behaviour of dissimilar weld joint of steels FB2 and F during long-term creep test

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F47718684%3A_____%2F18%3AN0000043" target="_blank" >RIV/47718684:_____/18:N0000043 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1088/issn.1757-899X/461/1/012036" target="_blank" >http://dx.doi.org/10.1088/issn.1757-899X/461/1/012036</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1088/issn.1757-899X/461/1/012036" target="_blank" >10.1088/issn.1757-899X/461/1/012036</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Behaviour of dissimilar weld joint of steels FB2 and F during long-term creep test

Popis výsledku v původním jazyce

Creep test to the rupture of both the dissimilar weld joint made of FB2 and F martensitic steels and the base materials was carried out at temperatures ranging from 550 °C to 650 °C in the stress range from 70 to 220 MPa. Creep rupture strengths of the weld joint and the base materials were evaluated using Larson-Miller parameter. Assessment of microstructure development and changes of hardness was correlated with the creep strength. Critical zones of creep damage were determined. At lower temperatures and higher stresses the weld joint ruptured in the base material of F steel unaffected by welding, while at higher temperatures and lower stresses rupture occurred in the intercritical heated and fine-grained parts of heat affected zone of steel F. During creep at temperatures above 575 °C Laves phase precipitated in all parts of the weld joint and especially in the heat affected zones. Coarse Laves phase particles and their clusters with chromium carbides served as nucleation centres for cavities. As the fine grained heat affected zone of F steel was the softest part of the weld joint, many cavities originated and initiated causing failure of samples.

Název v anglickém jazyce

Behaviour of dissimilar weld joint of steels FB2 and F during long-term creep test

Popis výsledku anglicky

Creep test to the rupture of both the dissimilar weld joint made of FB2 and F martensitic steels and the base materials was carried out at temperatures ranging from 550 °C to 650 °C in the stress range from 70 to 220 MPa. Creep rupture strengths of the weld joint and the base materials were evaluated using Larson-Miller parameter. Assessment of microstructure development and changes of hardness was correlated with the creep strength. Critical zones of creep damage were determined. At lower temperatures and higher stresses the weld joint ruptured in the base material of F steel unaffected by welding, while at higher temperatures and lower stresses rupture occurred in the intercritical heated and fine-grained parts of heat affected zone of steel F. During creep at temperatures above 575 °C Laves phase precipitated in all parts of the weld joint and especially in the heat affected zones. Coarse Laves phase particles and their clusters with chromium carbides served as nucleation centres for cavities. As the fine grained heat affected zone of F steel was the softest part of the weld joint, many cavities originated and initiated causing failure of samples.

Druh

J_ost - Ostatní články v recenzovaných periodicích

CEP obor

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OECD FORD obor

20501 - Materials engineering

Projekt

<a href="/cs/project/TE01020118" target="_blank" >TE01020118: Elektronová mikroskopie</a><br>

Návaznosti

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

Rok uplatnění

2018

Kód důvěrnosti údajů

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

Název periodika

IOP Conf. Series: Materials Science and Engineering

ISSN

1757-8981

e-ISSN

1757-899X

Svazek periodika

461

Číslo periodika v rámci svazku

012036

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

6

Strana od-do

1-6

Kód UT WoS článku

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EID výsledku v databázi Scopus

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