Number of the records: 1
Influence of Long-term Annealing and Hot Bending on Creep of P92 Pipe
- 1.
SYSNO ASEP 0458366 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Influence of Long-term Annealing and Hot Bending on Creep of P92 Pipe Author(s) Král, Petr (UFM-A) RID, ORCID
Dvořák, Jiří (UFM-A) RID, ORCID
Kvapilová, Marie (UFM-A) RID, ORCID
Kuchařová, Květa (UFM-A) RID, ORCID
Sklenička, Václav (UFM-A) RID, ORCID
Svobodová, M. (CZ)
Čmakal, J. (CZ)Number of authors 7 Source Title Acta Physica Polonica A. - : Polska Akademia Nauk - ISSN 0587-4246
Roč. 128, č. 4 (2015), s. 543-547Number of pages 5 s. Action ISPMA13 - International Symposium on Physics of Materials /13./ Event date 31.08.2014-04.09.2014 VEvent location Praha Country CZ - Czech Republic Event type WRD Language eng - English Country PL - Poland Keywords creep ; long-term annealing ; hot bending ; P92 pipe Subject RIV JG - Metallurgy R&D Projects TA02010260 GA TA ČR - Technology Agency of the Czech Republic (TA ČR) ED1.1.00/02.0068 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Institutional support UFM-A - RVO:68081723 UT WOS 000366357300019 EID SCOPUS 84950281571 DOI 10.12693/APhysPolA.128.543 Annotation 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 direction. It was found that ageing at 650 °C for 10 000 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 20 000h. 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. Workplace Institute of Physics of Materials Contact Yvonna Šrámková, sramkova@ipm.cz, Tel.: 532 290 485 Year of Publishing 2017
Number of the records: 1