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Influence of a prior pressurization treatment on creep behaviour of an ultrafine-grained Zr-2.5%Nb alloy
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SYSNO ASEP 0543339 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Influence of a prior pressurization treatment on creep behaviour of an ultrafine-grained Zr-2.5%Nb alloy Author(s) Sklenička, Václav (UFM-A) RID, ORCID
Dvořák, Jiří (UFM-A) RID, ORCID
Král, Petr (UFM-A) RID, ORCID
Betekhtin, V. I. (RU)
Kadomtsev, A. G. (RU)
Narykova, M. V. (RU)
Dobatkin, S.V. (RU)
Kuchařová, Květa (UFM-A) RID, ORCID
Kvapilová, Marie (UFM-A) RID, ORCIDNumber of authors 9 Article number 141570 Source Title Materials Science and Engineering A Structural Materials Properties Microstructure and Processing. - : Elsevier - ISSN 0921-5093
Roč. 820, JUL (2021)Number of pages 13 s. Language eng - English Country CH - Switzerland Keywords Creep testing ; Electron microscopy ; High hydrostatic pressure ; Nanoporosity ; Ultrafine-grained material ; Zirconium alloy Subject RIV JG - Metallurgy OECD category Materials engineering R&D Projects GC20-14450J GA ČR - Czech Science Foundation (CSF) Method of publishing Limited access Institutional support UFM-A - RVO:68081723 UT WOS 000668745100001 EID SCOPUS 85107754279 DOI 10.1016/j.msea.2021.141570 Annotation The effect of an application of an external high hydrostatic pressure on creep behaviour, the microstructure, and nanoscale porosity in an ultrafine-grained cladding Zr-2.5 wt%Nb alloy processed by equal channel angular pressing (ECAP) was investigated by comparative creep testing. The results show that, under identical creep loading conditions, ECAP processed specimens subjected to subsequent high hydrostatic pressurization treatment prior to creep exposure exhibited no substantial differences in creep behaviour compared to specimens processed by ECAP only. The selected level of high hydrostatic pressurization treatment used in this study is not indicative of an effective removal of nanoscale porosity resulting from ECAP processing. By comparison to the as-received state, an increasing number of ECAP passes leads to a significant weakening of creep resistence of the alloy. It is suggested that the reasons for the occurrence of creep weakening after ECAP processing are an accumulation of high-angle grain boundaries, multiplication of dislocations, coarsening and/or dissolution of the Nd-rich second phase precipitates, and dislocation/particle interactions. Workplace Institute of Physics of Materials Contact Yvonna Šrámková, sramkova@ipm.cz, Tel.: 532 290 485 Year of Publishing 2022 Electronic address https://www.sciencedirect.com/science/article/pii/S092150932100839X?via%3Dihub
Number of the records: 1