Creep properties and microstructure evoluation of weld joint of the pipe made of P92 steel

Kód výsledku v IS VaVaI

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Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Creep properties and microstructure evoluation of weld joint of the pipe made of P92 steel

Popis výsledku v původním jazyce

One-side weld joint of W type was prepared from P92 type steel using GTAW & SMAW method. Creep test to the rupture of smooth cross-weld samples has been carried out at temperatures ranging from 575 to 650 °C and at stresses from 70 to 240 MPa. Fractographic analysis, hardness measurement and detailed study of submicrostructure have been performed using light, scanning and transmission electron microscopy. Changes of microstructure were correlated with the creep strength. Increase in size of secondary phases and cavities formation were evident after creep tests at temperatures above 575°C. Voids were concentrated in the fine prior austenite grain heat affected zones, where fracture occurred. In addition, a sporadic occurrence of individual cavities wasfound out in the base material and the weld metal after tests at 625 and 650 °C. During creep exposures at temperatures above 600 °C Laves phase precipitated.

Název v anglickém jazyce

Creep properties and microstructure evoluation of weld joint of the pipe made of P92 steel

Popis výsledku anglicky

One-side weld joint of W type was prepared from P92 type steel using GTAW & SMAW method. Creep test to the rupture of smooth cross-weld samples has been carried out at temperatures ranging from 575 to 650 °C and at stresses from 70 to 240 MPa. Fractographic analysis, hardness measurement and detailed study of submicrostructure have been performed using light, scanning and transmission electron microscopy. Changes of microstructure were correlated with the creep strength. Increase in size of secondary phases and cavities formation were evident after creep tests at temperatures above 575°C. Voids were concentrated in the fine prior austenite grain heat affected zones, where fracture occurred. In addition, a sporadic occurrence of individual cavities wasfound out in the base material and the weld metal after tests at 625 and 650 °C. During creep exposures at temperatures above 600 °C Laves phase precipitated.

Druh

D - Stať ve sborníku

CEP obor

JG - Hutnictví, kovové materiály

OECD FORD obor

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Projekt

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Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2010

Kód důvěrnosti údajů

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

Název statě ve sborníku

Proc. of the 9th Liege conference Materials for advanced power engineering 2010

ISBN

978-3-89336-685-9

ISSN

1866-1793

e-ISSN

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Počet stran výsledku

10

Strana od-do

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Název nakladatele

Forschung Zentrum Julich GmbH

Místo vydání

Liege

Místo konání akce

Liege

Datum konání akce

1. 1. 2010

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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