dc.contributor.author | Sestak, Petr | |
dc.contributor.author | Cerny, Miroslav | |
dc.contributor.author | Zhang, Zhiliang | |
dc.contributor.author | Pokluda, Jaroslav | |
dc.date.accessioned | 2020-07-15T08:28:37Z | |
dc.date.available | 2020-07-15T08:28:37Z | |
dc.date.created | 2020-07-08T15:58:46Z | |
dc.date.issued | 2020 | |
dc.identifier.citation | Crystals. 2020, 10 (7), 590 | en_US |
dc.identifier.issn | 2073-4352 | |
dc.identifier.uri | https://hdl.handle.net/11250/2666070 | |
dc.description.abstract | The cohesive strength of 3, 5, and 11 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_US |
dc.language.iso | eng | en_US |
dc.publisher | MDPI | en_US |
dc.rights | Navngivelse 4.0 Internasjonal | * |
dc.rights.uri | http://creativecommons.org/licenses/by/4.0/deed.no | * |
dc.title | Extraordinary Response of H-Charged and H-Free Coherent Grain Boundaries in Nickel to Multiaxial Loading | en_US |
dc.type | Peer reviewed | en_US |
dc.type | Journal article | en_US |
dc.description.version | publishedVersion | en_US |
dc.source.volume | 10 | en_US |
dc.source.journal | Crystals | en_US |
dc.source.issue | 590 | en_US |
dc.identifier.doi | https://doi.org/10.3390/cryst10070590 | |
dc.identifier.cristin | 1818982 | |
dc.description.localcode | This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited | en_US |
cristin.ispublished | true | |
cristin.fulltext | original | |
cristin.qualitycode | 1 | |