Počet záznamů: 1
Characterization of creep properties and the microstructure of a service-exposed low alloy CrMoV steel steam pipe
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SYSNO ASEP 0561871 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Characterization of creep properties and the microstructure of a service-exposed low alloy CrMoV steel steam pipe Tvůrce(i) Kvapilová, Marie (UFM-A) RID, ORCID
Oháňková, M. (CZ)
Král, Petr (UFM-A) RID, ORCID
Dvořák, Jiří (UFM-A) RID, ORCID
Kuchařová, Květa (UFM-A) RID, ORCID
Čmakal, J. (CZ)
Sklenička, Václav (UFM-A) RID, ORCIDCelkový počet autorů 7 Číslo článku 143684 Zdroj.dok. Materials Science and Engineering A Structural Materials Properties Microstructure and Processing. - : Elsevier - ISSN 0921-5093
Roč. 853, SEP (2022)Poč.str. 14 s. Jazyk dok. eng - angličtina Země vyd. CH - Švýcarsko Klíč. slova CrMoV steel ; Degradation factors ; Creep behaviour ; Deformation mechanisms ; Microstructure Vědní obor RIV JG - Hutnictví, kovové materiály Obor OECD Materials engineering CEP TN01000015 GA TA ČR - Technologická agentura ČR Způsob publikování Omezený přístup Institucionální podpora UFM-A - RVO:68081723 UT WOS 000857097500001 EID SCOPUS 85136029660 DOI 10.1016/j.msea.2022.143684 Anotace The effect of service degradation on the microstructure and creep properties of a 0.5%Cr-0.5%Mo-0.3%V steel steam pipe after an accumulated service time of 77,900 h was investigated and analysed. For comparison purposes, additional experiments and analyses were carried out on the same pipe in the as-received (service unused) conditions. The results of the microstructural analysis and the short-term creep testing confirmed that the high creep resistance of the investigated steel is caused predominantly by the dispersion of fine vanadium carbides, providing an effective precipitation hardening of the steel matrix. However, the microstructure is not in an equilibrium state, and as the size of the vanadium carbides and the accompanying mean interparticle spacing increase during the creep, the detrimental effect of vanadium carbide coarsening leads to a significant weakening in the precipitation hardening and, consequently, a decrease in the creep resistance. No creep cavitation was observed in the service-exposed steel. The short-term creep testing of the service-exposed and unused states of the steel was carried out in the power-law (dislocation) creep regime. Analysis of the creep data did not reveal any change in the operating creep deformation mechanisms as a response to the structural processes occurring during the long-term service. Instead, changes in the kinetics of creep flow and fracture were found. Pracoviště Ústav fyziky materiálu Kontakt Yvonna Šrámková, sramkova@ipm.cz, Tel.: 532 290 485 Rok sběru 2023 Elektronická adresa https://www.sciencedirect.com/science/article/pii/S0921509322010681?via%3Dihub
Počet záznamů: 1