CORRELATION OF CREEP PROPERTIES OF SIMULATED AND REAL WELD JOINTS IN MODIFIED 9 %Cr STEELS

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27230%2F10%3A10225090" target="_blank" >RIV/61989100:27230/10:10225090 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

CORRELATION OF CREEP PROPERTIES OF SIMULATED AND REAL WELD JOINTS IN MODIFIED 9 %Cr STEELS

Popis výsledku v původním jazyce

The aim of the investigation performed is to why creep rupture on welded joints at high temperatures is often observed in the heat-affected zone (HAZ), especially in the so-called inter-critical zone (IC-HAZ). The creep rupture strength (CRS) of cross-weld joints is usually about 20 to 30 % lower than that of the base material, in the case of creep-resistant modified chromium steels. With increasing IPS of secondary phases, the proof stress and creep rupture strength decreases, while creep rate increases. The Smitweld machine was used to reproduce the thermal cycles in the HAZ. The microstructure of the HAZ-simulated regions was analysed by transmission electron microscopy. Real creep tests were carried out on specimens with HAZ-simulated regions and also on the P91 real welded joints. It was found that inter-particle spacing of secondary phases in the inter-critical region of the HAZ is much higher than that of the base material.

Název v anglickém jazyce

CORRELATION OF CREEP PROPERTIES OF SIMULATED AND REAL WELD JOINTS IN MODIFIED 9 %Cr STEELS

Popis výsledku anglicky

The aim of the investigation performed is to why creep rupture on welded joints at high temperatures is often observed in the heat-affected zone (HAZ), especially in the so-called inter-critical zone (IC-HAZ). The creep rupture strength (CRS) of cross-weld joints is usually about 20 to 30 % lower than that of the base material, in the case of creep-resistant modified chromium steels. With increasing IPS of secondary phases, the proof stress and creep rupture strength decreases, while creep rate increases. The Smitweld machine was used to reproduce the thermal cycles in the HAZ. The microstructure of the HAZ-simulated regions was analysed by transmission electron microscopy. Real creep tests were carried out on specimens with HAZ-simulated regions and also on the P91 real welded joints. It was found that inter-particle spacing of secondary phases in the inter-critical region of the HAZ is much higher than that of the base material.

Druh

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

CEP obor

JG - Hutnictví, kovové materiály

OECD FORD obor

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Projekt

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Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2010

Kód důvěrnosti údajů

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

Název periodika

WELDING IN THE WORLD

ISSN

0043-2288

e-ISSN

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Svazek periodika

54

Číslo periodika v rámci svazku

1-2

Stát vydavatele periodika

FR - Francouzská republika

Počet stran výsledku

8

Strana od-do

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Kód UT WoS článku

000274740500004

EID výsledku v databázi Scopus

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