- Tytuł:
- Examinations of the Welded Joint T91 Steel After Service at Elevated Temperature
- Autorzy:
-
Golański, G.
Merda, A.
Klimaszewska, K.
Wieczorek, P. - Powiązania:
- https://bibliotekanauki.pl/articles/352311.pdf
- Data publikacji:
- 2020
- Wydawca:
- Polska Akademia Nauk. Czytelnia Czasopism PAN
- Tematy:
-
T91 steel
welded joint
microstructure
hardness
microhardness - Opis:
- The article provides results of the microstructure examinations and mechanical properties (hardness and microhardness tests) of the welded joint T91 steel taken from the live steam pipeline. Examined joint has been exploited for about 45 000 hours in a temperature of 535°C and the steam pressure equals to 13.5 MPa. Examined joint was made as a double bead by the additional materials with a different chemical composition. It was proved that the joint was characterized by a differential microstructure on the cross-section of the weld. Moreover, decarburized zone in the lower alloyed material and carbides zone in the higher alloyed material were revealed in the weld line and on the boundary penetration of beads. Furthermore, it was shown that the main mechanism of a joint degradation is a privileged precipitation of carbides on the grain boundaries, and an increase of their size.
- Źródło:
-
Archives of Metallurgy and Materials; 2020, 65, 1; 237-242
1733-3490 - Pojawia się w:
- Archives of Metallurgy and Materials
- Dostawca treści:
- Biblioteka Nauki
Artykuł