The Effect of sigma -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%2F68407700%3A21220%2F16%3A00304563" target="_blank" >RIV/68407700:21220/16:00304563 - isvavai.cz</a>

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 sigma -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/2.10x4 h). The investigations of the precipitates were focused on the occurrence ofsigma-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 sigma-phase were studied on macroscopic level by color etching method using light optical microscopy. The effect of microstructural changes (sigma-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 sigma-phase. It was found that the sigma-phase distribution is influenced by welding process. The influence of brittle sigma-phase on long-term durability of the degraded steel regarding its insufficient impact strength has been discussed.

Název v anglickém jazyce

The Effect of sigma -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/2.10x4 h). The investigations of the precipitates were focused on the occurrence ofsigma-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 sigma-phase were studied on macroscopic level by color etching method using light optical microscopy. The effect of microstructural changes (sigma-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 sigma-phase. It was found that the sigma-phase distribution is influenced by welding process. The influence of brittle sigma-phase on long-term durability of the degraded steel regarding its insufficient impact strength has been discussed.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

JG - Hutnictví, kovové materiály

OECD FORD obor

—

Projekt

<a href="/cs/project/LO1207" target="_blank" >LO1207: Podpora udržitelnosti Inovačního centra diagnostiky a aplikace materiálů na ČVUT-FS v Praze</a><br>

Návaznosti

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

Rok uplatnění

2016

Kód důvěrnosti údajů

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

Název periodika

Acta Physica Polonica A

ISSN

0587-4246

e-ISSN

—

Svazek periodika

130

Číslo periodika v rámci svazku

4

Stát vydavatele periodika

PL - Polská republika

Počet stran výsledku

3

Strana od-do

960-962

Kód UT WoS článku

000388580800041

EID výsledku v databázi Scopus

2-s2.0-84996835477