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dc.contributor.authorSkotnicová, Kateřina
dc.contributor.authorKirillova, Valentina M.
dc.contributor.authorDrápala, Jaromír
dc.contributor.authorBurchanov, Gennadij S.
dc.date.accessioned2012-05-11T11:47:25Z
dc.date.available2012-05-11T11:47:25Z
dc.date.issued2012
dc.identifier.citationInternational journal of refractory metals and hard materials. 2012, vol. 32, p. 61-65.cs
dc.identifier.issn0263-4368
dc.identifier.urihttp://hdl.handle.net/10084/90438
dc.description.abstractParameters of sub-structure of single crystals of low-alloyed tungsten alloys from the system W-Nb and W-Mo were investigated after thermal cycling in argon protective atmosphere. The mode of thermal cycling of tungsten based single crystals consisted of heating to the temperature of 2500 °C and of cooling to the temperature of 500 °C with dwell of 3.5 s at those temperature. It was established with use of X-ray topography, OLM and SEM, that after 100 thermocycles dislocations were re-distributed, sub-boundaries of the 2nd order were “washed away” (disappeared), and the size of sub-grains of the 1st order and their angle disorientations increased – as a result of heat stresses. After 500 thermocycles formation of new boundaries was observed in the structure as a result of polygonisation, i.e. by ordering of dislocations of the same sign. Application of 2000 thermocycles led to an increase of size of new grains and that of their angle disorientations. All the tested samples preserved at the thermal cycling within the interval from 0 to 2000 thermocycles their single crystalline structure. Formation of oxides on the surface of single crystals is connected with residual content of oxygen in argon.cs
dc.format.extent819218 bytescs
dc.format.mimetypeapplication/pdfcs
dc.language.isoencs
dc.publisherElseviercs
dc.relation.ispartofseriesInternational journal of refractory metals and hard materialscs
dc.relation.urihttp://dx.doi.org/10.1016/j.ijrmhm.2012.02.001cs
dc.subjecttungsten alloycs
dc.subjectsingle crystalscs
dc.subjectthermal cyclingcs
dc.subjectelectron beam zone meltingcs
dc.subjectX-ray topographycs
dc.titleStructural changes of single crystals of low-alloyed tungsten alloys at thermal cyclingcs
dc.typearticlecs
dc.identifier.locationNení ve fondu ÚKcs
dc.identifier.doi10.1016/j.ijrmhm.2012.02.001
dc.rights.accessopenAccess
dc.type.versionsubmittedVersion
dc.type.statusPeer-reviewedcs
dc.description.sourceWeb of Sciencecs
dc.description.volume32cs
dc.description.lastpage65cs
dc.description.firstpage61cs
dc.identifier.wos000302841400011


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