Examinations of the Welded Joint T91 Steel After Service at Elevated Temperature

• Autorzy: Golański G. , Merda A. , Klimaszewska K. , Wieczorek P.

Identyfikatory

DOI

10.24425/amm.2019.131120

• Języki publikacji: EN

Abstrakty

EN

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.

Słowa kluczowe

EN

T91 steel; welded joint; microstructure; hardness; microhardness

• Wydawca: Institute of Metallurgy and Materials Science of Polish Academy of Sciences ; Committee of Materials Engineering and Metallurgy of Polish Academy of Sciences
• Czasopismo: Archives of Metallurgy and Materials
• Rocznik: 2020
• Tom: Vol. 65, iss. 1
• Strony: 237--242
• Opis fizyczny: Bibliogr. 20 poz., fot., rys., tab.

Twórcy

autor

Golański G.

• Czestochowa University of Technology, Department of Materials Engineering, 19 Armii Krajowej Av., 42-200 Częstochowa, Poland

autor

Merda A.

• Czestochowa University of Technology, Department of Materials Engineering, 19 Armii Krajowej Av., 42-200 Częstochowa, Poland

autor

Klimaszewska K.

• Czestochowa University of Technology, Department of Materials Engineering, 19 Armii Krajowej Av., 42-200 Częstochowa, Poland

autor

Wieczorek P.

• Czestochowa University of Technology, Department of Materials Engineering, 19 Armii Krajowej Av., 42-200 Częstochowa, Poland

Bibliografia

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Uwagi

PL

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2020).