Počet záznamů: 1
Influence of severe plastic deformation and subsequent annealing on creep behaviour of martensitic 9% Cr steel
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SYSNO ASEP 0576256 Druh ASEP C - Konferenční příspěvek (mezinárodní konf.) Zařazení RIV D - Článek ve sborníku Název Influence of severe plastic deformation and subsequent annealing on creep behaviour of martensitic 9% Cr steel Tvůrce(i) Král, Petr (UFM-A) RID, ORCID
Dvořák, Jiří (UFM-A) RID, ORCID
Sklenička, Václav (UFM-A) RID, ORCID
Horita, Z. (JP)
Tokizawa, Y. (JP)
Tang, Y. (JP)
Kunčická, Lenka (UFM-A) ORCID
Kuchařová, Květa (UFM-A) RID, ORCID
Kvapilová, Marie (UFM-A) RID, ORCID
Svobodová, M. (CZ)Celkový počet autorů 10 Zdroj.dok. METAL 2021. 30th Anniversary International Conference on Metallurgy and Materials. Conference proceedings. - Ostrava : TANGER, 2021 - ISSN 2694-9296 - ISBN 978-80-87294-99-4 Rozsah stran s. 429-434 Poč.str. 6 s. Forma vydání Tištěná - P Akce Metal 2021 - International Conference on Metallurgy and Materials /30./ Datum konání 26.05.2021 - 28.05.2021 Místo konání Brno Země CZ - Česká republika Typ akce WRD Jazyk dok. eng - angličtina Země vyd. CZ - Česká republika Klíč. slova Creep-resistant 9 %Cr steels ; severe plastic deformation ; creep ; microstructure Vědní obor RIV JG - Hutnictví, kovové materiály Obor OECD Materials engineering CEP GA19-18725S GA ČR - Grantová agentura ČR Institucionální podpora UFM-A - RVO:68081723 EID SCOPUS 85124373928 DOI 10.37904/metal.2021.4147 Anotace The objective of the study is to evaluate the effects of severe plastic deformation (SPD) and annealing on creep behaviour of advanced tungsten modified creep-resistant 9 % Cr martensitic P92 steel. The as-received P92 steel was deformed by high-pressure torsion (HTP), high-pressure sliding (HPS) and rotary swaging (RS) at room temperature prior creep testing. These SPD methods imposed significantly different equivalent plastic strain in the range from 1 up to 20. Constant load creep tests in tension were performed in an argon atmosphere at 873 K and applied stress ranging from 50 to 200 MPa. The microstructure and phase composition of P92 steel were studied using a scanning electron microscope Tescan Lyra 3 and a transmission electron microscope Jeol 2100F. The results show that under the same creep loading conditions the HPT and HPS-processed P92 steel exhibited significantly faster minimum creep rates, creep fracture strain and the decrease in the value of the stress exponent of the creep rate in comparison with as-received P92 steel. However, it was revealed that the RS-processed specimens exhibited one order of magnitude lower minimum creep rate and lower ductility compared to commercial P92 steel. The creep curves for the HPT and HPS-processed states exhibited a pronounced minimum of strain rate. The pronounced minimum of strain rate disappeared when these states were annealed at 923K/500h before application of creep loading. The microstructure changes occurring during creep and different creep behaviour between as-received and deformed states are discussed. Pracoviště Ústav fyziky materiálu Kontakt Yvonna Šrámková, sramkova@ipm.cz, Tel.: 532 290 485 Rok sběru 2025
Počet záznamů: 1