The microstructural changes in the heat affected zone (HAZ) of 9% chromium ferritic steel for manufacturing fossil fired power plant components are investigated. The heat treatment region of 925 degrees C in HAZ was tested as a potential location of Type IV cracks which occur during operation. For comparison of characteristics and material behaviour, the microstructural investigation of simulated specimens of HAZ was carried out at room temperature, i.e. 20 degrees C and at an operating temperature of 600 degrees C, using two Types of specimens: with postweld heat treatment (PWHT) and without PWHT. The test results revealed the presence of precipitates at the grain boundaries in specimens simulated at 925 degrees C with subsequent PWHT. These results confirmed that PWHT is necessary for P91 steel to be integrated into components in service under creep condition.
Keywords:
P91 / heat affected zone / Type IV cracks
Source:
Materials At High Temperatures, 2010, 27, 3, 233-242
TY - JOUR
AU - Milović, Ljubica
PY - 2010
UR - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/1734
AB - The microstructural changes in the heat affected zone (HAZ) of 9% chromium ferritic steel for manufacturing fossil fired power plant components are investigated. The heat treatment region of 925 degrees C in HAZ was tested as a potential location of Type IV cracks which occur during operation. For comparison of characteristics and material behaviour, the microstructural investigation of simulated specimens of HAZ was carried out at room temperature, i.e. 20 degrees C and at an operating temperature of 600 degrees C, using two Types of specimens: with postweld heat treatment (PWHT) and without PWHT. The test results revealed the presence of precipitates at the grain boundaries in specimens simulated at 925 degrees C with subsequent PWHT. These results confirmed that PWHT is necessary for P91 steel to be integrated into components in service under creep condition.
PB - Taylor & Francis Ltd, Abingdon
T2 - Materials At High Temperatures
T1 - Microstructural investigations of the simulated heat affected zone of the creep resistant steel P91
EP - 242
IS - 3
SP - 233
VL - 27
DO - 10.3184/096034010X12819801014958
ER -
@article{
author = "Milović, Ljubica",
year = "2010",
abstract = "The microstructural changes in the heat affected zone (HAZ) of 9% chromium ferritic steel for manufacturing fossil fired power plant components are investigated. The heat treatment region of 925 degrees C in HAZ was tested as a potential location of Type IV cracks which occur during operation. For comparison of characteristics and material behaviour, the microstructural investigation of simulated specimens of HAZ was carried out at room temperature, i.e. 20 degrees C and at an operating temperature of 600 degrees C, using two Types of specimens: with postweld heat treatment (PWHT) and without PWHT. The test results revealed the presence of precipitates at the grain boundaries in specimens simulated at 925 degrees C with subsequent PWHT. These results confirmed that PWHT is necessary for P91 steel to be integrated into components in service under creep condition.",
publisher = "Taylor & Francis Ltd, Abingdon",
journal = "Materials At High Temperatures",
title = "Microstructural investigations of the simulated heat affected zone of the creep resistant steel P91",
pages = "242-233",
number = "3",
volume = "27",
doi = "10.3184/096034010X12819801014958"
}
Milović, L.. (2010). Microstructural investigations of the simulated heat affected zone of the creep resistant steel P91. in Materials At High Temperatures
Taylor & Francis Ltd, Abingdon., 27(3), 233-242.
https://doi.org/10.3184/096034010X12819801014958
Milović L. Microstructural investigations of the simulated heat affected zone of the creep resistant steel P91. in Materials At High Temperatures. 2010;27(3):233-242.
doi:10.3184/096034010X12819801014958 .
Milović, Ljubica, "Microstructural investigations of the simulated heat affected zone of the creep resistant steel P91" in Materials At High Temperatures, 27, no. 3 (2010):233-242,
https://doi.org/10.3184/096034010X12819801014958 . .
