Extraordinary Response of H-Charged and H-Free Coherent Grain Boundaries in Nickel to Multiaxial Loading

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dc.contributor.authorŠesták, Petrcs
dc.contributor.authorČerný, Miroslavcs
dc.contributor.authorZhang, Zhiliangcs
dc.contributor.authorPokluda, Jaroslavcs
dc.coverage.issue7cs
dc.coverage.volume10cs
dc.date.issued2020-07-08cs
dc.description.abstractThe cohesive strength of 3, v5, and v11 grain boundaries (GBs) in clean and hydrogen-segregated fcc nickel was systematically studied as a function of the superimposed transverse biaxial stresses using ab initio methods. The obtained results for H-free GBs revealed a quite different response of the coherent twinning boundary 3 to the applied transverse stresses in comparison to the other GB types. While the cohesive strength of 5 and 11 GBs increased with increasing level of tensile transverse stresses, the strength of 3 GB remained constant for any applied levels of transverse stresses. In the case of GBs with segregated hydrogen, the cohesive strength of 3 was distinctly reduced for all levels of transverse stresses, while the strength reduction of 5 and 11 GBs was significant only for a nearly isotropic (hydrostatic) triaxial loading. This extraordinary response explains a high susceptibility of 3 GBs to crack initiation, as recently reported in an experimental study. Moreover, a highly triaxial stress at the fronts of microcracks initiated at 3 boundaries caused a strength reduction of adjacent high-energy grain boundaries which thus became preferential sites for further crack propagation.en
dc.formattextcs
dc.format.extent1-12cs
dc.format.mimetypeapplication/pdfcs
dc.identifier.citationCrystals. 2020, vol. 10, issue 7, p. 1-12.en
dc.identifier.doi10.3390/cryst10070590cs
dc.identifier.issn2073-4352cs
dc.identifier.orcid0000-0001-8172-1683cs
dc.identifier.orcid0000-0003-0235-8973cs
dc.identifier.orcid0000-0002-8449-1200cs
dc.identifier.other164471cs
dc.identifier.researcheridD-8514-2012cs
dc.identifier.researcheridB-6259-2008cs
dc.identifier.researcheridD-7239-2012cs
dc.identifier.scopus23976608700cs
dc.identifier.scopus7004499962cs
dc.identifier.urihttp://hdl.handle.net/11012/193428
dc.language.isoencs
dc.publisherMultidisciplinary Digital Publishing Institutecs
dc.relation.ispartofCrystalscs
dc.relation.urihttps://www.mdpi.com/2073-4352/10/7/590cs
dc.rightsCreative Commons Attribution 4.0 Internationalcs
dc.rights.accessopenAccesscs
dc.rights.sherpahttp://www.sherpa.ac.uk/romeo/issn/2073-4352/cs
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/cs
dc.subjectab initio calculationsen
dc.subjecthydrogen embrittlementen
dc.subjectgrain boundaryen
dc.subjectcohesive strengthen
dc.subjectmultiaxial loadingen
dc.titleExtraordinary Response of H-Charged and H-Free Coherent Grain Boundaries in Nickel to Multiaxial Loadingen
dc.type.driverarticleen
dc.type.statusPeer-revieweden
dc.type.versionpublishedVersionen
sync.item.dbidVAV-164471en
sync.item.dbtypeVAVen
sync.item.insts2025.02.03 15:48:10en
sync.item.modts2025.01.17 16:40:47en
thesis.grantorVysoké učení technické v Brně. Fakulta strojního inženýrství. Ústav fyzikálního inženýrstvícs
thesis.grantorVysoké učení technické v Brně. Středoevropský technologický institut VUT. Pokročilé kovové materiály a kompozity na bázi kovůcs
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