Počet záznamů: 1  

Investigation of titanium alloys using neutron diffraction

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    SYSNO ASEP0557372
    Druh ASEPD - Dizertace
    Zařazení RIVZáznam nebyl označen do RIV
    NázevInvestigation of titanium alloys using neutron diffraction
    Tvůrce(i) Németh, Gergely (UJF-V) SAI, ORCID
    Celkový počet autorů1
    Vyd. údajePraha: Univerzita Karlova, Matematicko-fyzikální fakulta, 2021
    Poč.str.109 s.
    Forma vydáníTištěná - P
    Jazyk dok.eng - angličtina
    Země vyd.CZ - Česká republika
    Klíč. slovaTitanium ; severe plastic deformation (SPD) ; residual stresses ; neutron diffraction ; deformation twinning
    Obor OECDCondensed matter physics (including formerly solid state physics, supercond.)
    Institucionální podporaUJF-V - RVO:61389005
    DOI20.500.11956/128397
    AnotaceTitanium grade 2 was treated by multiple passes of the continuous equalchannel angular pressing technique (CONFORM ECAP) and, after each pass, additionally by rotary swaging. The residual strain field in samples processed by only CONFORM ECAP was studied by neutron diffraction strain scanning. In order to elucidate the microscopic background and calculate the related residual stress field, the local microstructure was thoroughly investigated by various experimental techniques. The microstructure and the deformation behavior of the rotary swaged samples was studied by transmission electron microscopy and by in-situ neutron diffraction during compression. The results of the analyses indicated that microstructural gradients were present in the material as the result of the inhomogeneous deformation during the CONFORM ECAP treatment. These gradients were identified as the main reason of the presence of residual stress fields. The distributions of stress fields calculated based on microstructural parameters were in correlation with simulation results. The additional rotary swaging treatment resulted in a nanocrystalline grain structure with increasing homogeneity as the number of previous CONFORM ECAP passes increased. Deformation twinning was identified as a major deformation mechanism whose role was gradually reduced by the decreasing overall grain size.
    PracovištěÚstav jaderné fyziky
    KontaktMarkéta Sommerová, sommerova@ujf.cas.cz, Tel.: 266 173 228
    Rok sběru2023
Počet záznamů: 1  

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