Creep properties in similar weld joint of a thick-walled P92 steel pipe

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60193247%3A_____%2F16%3AN0000023" target="_blank" >RIV/60193247:_____/16:N0000023 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68081723:_____/16:00463440

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.matchar.2016.06.033" target="_blank" >http://dx.doi.org/10.1016/j.matchar.2016.06.033</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.matchar.2016.06.033" target="_blank" >10.1016/j.matchar.2016.06.033</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Creep properties in similar weld joint of a thick-walled P92 steel pipe

Popis výsledku v původním jazyce

The creep behaviour of a welded joint of a real thick-walled P92 steel pipe was investigated at 600 and 650 °C and a stress ranging of 60–250 MPa using uniaxial tensile creep tests. Creep smooth cross-weld specimens were machined from different positions of the weld representing the welding sequence. Following analysis of creep data, all creep tests were performed in the region of power-law creep. The rate-controlling creep deformation mechanism is most probably climb of intergranular mobile dislocations for both the weld and base P92 steel. The creep resistance of the weld joint was lower than that of the base metal. No substantial differences were found in the minimum creep, the time to fracture and creep ductility for creep specimens taken from different locations of the weld. The fracture morphology of the crept welded specimens was found to be a mixture of transgranular ductile and intergranular mode. The fracture locations were found to shift from the weld metal in the higher stress region to the heat affected zone in the lower stress region. Many cavities formed at grain boundaries during creep. It was considered that the coarse precipitates of Laves phase acted as the preferential nucleation sites for cavities.

Název v anglickém jazyce

Creep properties in similar weld joint of a thick-walled P92 steel pipe

Popis výsledku anglicky

The creep behaviour of a welded joint of a real thick-walled P92 steel pipe was investigated at 600 and 650 °C and a stress ranging of 60–250 MPa using uniaxial tensile creep tests. Creep smooth cross-weld specimens were machined from different positions of the weld representing the welding sequence. Following analysis of creep data, all creep tests were performed in the region of power-law creep. The rate-controlling creep deformation mechanism is most probably climb of intergranular mobile dislocations for both the weld and base P92 steel. The creep resistance of the weld joint was lower than that of the base metal. No substantial differences were found in the minimum creep, the time to fracture and creep ductility for creep specimens taken from different locations of the weld. The fracture morphology of the crept welded specimens was found to be a mixture of transgranular ductile and intergranular mode. The fracture locations were found to shift from the weld metal in the higher stress region to the heat affected zone in the lower stress region. Many cavities formed at grain boundaries during creep. It was considered that the coarse precipitates of Laves phase acted as the preferential nucleation sites for cavities.

Druh

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

CEP obor

JG - Hutnictví, kovové materiály

OECD FORD obor

—

Projekt

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

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

Materials Characterization

ISSN

1044-5803

e-ISSN

—

Svazek periodika

119

Číslo periodika v rámci svazku

September 2016

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

12

Strana od-do

1-12

Kód UT WoS článku

000383304400001

EID výsledku v databázi Scopus

2-s2.0-84978437392