The effect of σ-phase formation on long-term durability of welding joints in SUPER 304H steels

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081723%3A_____%2F16%3A00467327" target="_blank" >RIV/68081723:_____/16:00467327 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/60193247:_____/16:N0000016

Výsledek na webu

<a href="http://dx.doi.org/10.12693/APhysPolA.130.960" target="_blank" >http://dx.doi.org/10.12693/APhysPolA.130.960</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.12693/APhysPolA.130.960" target="_blank" >10.12693/APhysPolA.130.960</a>

Jazyk výsledku

angličtina

Název v původním jazyce

The effect of σ-phase formation on long-term durability of welding joints in SUPER 304H steels

Popis výsledku v původním jazyce

Article presents results on the analysis of secondary phases formed in the medium-term static isothermal ageing welding joints of a SUPER 304H (675°C/2 104 h). The investigations of the precipitates were focused on the occurrence of σ-phase because its formation leads to significant deterioration of mechanical properties. The microstructure was investigated on microscopic level by scanning/transmission electron microscopy. The distribution and quantification of brittle σ-phase were studied on macroscopic level by color etching method using light optical microscopy. The effect of microstructural changes (σ-phase formation) on the impact strength of an aged base material was investigated. For comparison impact tests on received state material were also performed. The results showed that long-term ageing led to the significant reduction of impact strength as a result of the formation of the σ-phase. It was found that the σ-phase distribution is influenced by welding process. The influence of brittle σ-phase on long-term durability of the degraded steel regarding its insufficient impact strength has been discussed.

Název v anglickém jazyce

The effect of σ-phase formation on long-term durability of welding joints in SUPER 304H steels

Popis výsledku anglicky

Article presents results on the analysis of secondary phases formed in the medium-term static isothermal ageing welding joints of a SUPER 304H (675°C/2 104 h). The investigations of the precipitates were focused on the occurrence of σ-phase because its formation leads to significant deterioration of mechanical properties. The microstructure was investigated on microscopic level by scanning/transmission electron microscopy. The distribution and quantification of brittle σ-phase were studied on macroscopic level by color etching method using light optical microscopy. The effect of microstructural changes (σ-phase formation) on the impact strength of an aged base material was investigated. For comparison impact tests on received state material were also performed. The results showed that long-term ageing led to the significant reduction of impact strength as a result of the formation of the σ-phase. It was found that the σ-phase distribution is influenced by welding process. The influence of brittle σ-phase on long-term durability of the degraded steel regarding its insufficient impact strength has been discussed.

Druh

D - Stať ve sborníku

CEP obor

JG - Hutnictví, kovové materiály

OECD FORD obor

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Projekt

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

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2016

Kód důvěrnosti údajů

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

Název statě ve sborníku

Acta Physica Polonica A, Vol. 130, č. 4

ISBN

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ISSN

0587-4246

e-ISSN

—

Počet stran výsledku

3

Strana od-do

960-962

Název nakladatele

Polish Academy of Sciences Publishing House

Místo vydání

Warszawa

Místo konání akce

Krynica Zdrój

Datum konání akce

20. 9. 2015

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

000388580800041