Influence of long-term annealing and hot bending on creep of P92 pipe

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60193247%3A_____%2F14%3AUJP1686E" target="_blank" >RIV/60193247:_____/14:UJP1686E - isvavai.cz</a>

Result on the web

<a href="http://przyrbwn.icm.edu.pl/APP/PDF/128/a128z4p18.pdf" target="_blank" >http://przyrbwn.icm.edu.pl/APP/PDF/128/a128z4p18.pdf</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.12693/APhysPolA.128.543" target="_blank" >10.12693/APhysPolA.128.543</a>

Result language

angličtina

Original language name

Influence of long-term annealing and hot bending on creep of P92 pipe

Original language description

This work is focused on the creep behaviour of the thick-walled hot bended P92 pipe, with an outer diameter of 350 mm and wall thickness of 39 mm, in its different parts, namely in straight parts and bends. Selected creep specimens machined from axial section of pipe were thermally aged at 650°C to simulate microstructure degradation typical for long-term service conditions. Subsequent tensile creep tests at constant load were performed at 600 °C under 140 MPa and creep behaviour of various structure states was compared. Microstructure was investigated by scanning electron microscopy equipped with electron backscatter diffraction. It was found that ageing at 650 °C for 104 h caused the significant reduction of creep resistance down to about 10% of initial state and an additional slight reduction of creep resistance after longer ageing for 2 x 104 h. Further, creep behaviour was significantly influenced by specimen position in the extrados and intrados parts of bends. Microstructure investigation revealed that long-term annealing has negligible effect on high-angle grain boundary spacing and misorientation. By contrast, creep deformation of long-term annealed specimens led to significant decreasing in high-angle grain boundary spacing and caused a change in the misorientation distribution of boundaries.

Czech name

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Czech description

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Type

D - Article in proceedings

CEP classification

JG - Metallurgy, metal materials

OECD FORD branch

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Project

<a href="/en/project/TA02010260" target="_blank" >TA02010260: Research of materials changes occurring in modern advanced steels used for construction and reconstruction of pipelines in power and chemical industry</a><br>

Continuities

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

Publication year

2014

Confidentiality

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

Article name in the collection

Proceedings of the International Symposium on Physics of Materials (ISPMA13)

ISBN

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ISSN

1898-794X

e-ISSN

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Number of pages

5

Pages from-to

-1

Publisher name

Polish Academy of Sciences

Place of publication

Warsaw, Poland

Event location

Prague, Czech Republic

Event date

Aug 31, 2015

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

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