P. Yasniy (Avtor), V.B. Hlado (Avtor), V. Hutsaylyuk (Avtor), Tomaž Vuherer (Avtor)

Povzetek

This paper presents the results of investigation of a nuclear reactor pressurevessel steel 15Kh2MFA of two strength levels under cyclic loading. Themechanism of microcrack formation on the surface and in the bulk of 15Kh2MFA steel under cyclic deformation was investigated. Analysis of the specimen surfaces has shown that microcracks are caused by cyclic sliding in grains most favourably oriented with respect to the direction of the maximum shear stresses. Transmission electron microscope investigations show that microcracks in the material inside the grains are formed mainly along the band-type dislocation structure parallel to the dislocation subboundary. During cyclic deformation, the dislocation density on the subboundaries increases, in the local areas the dislocation density becomes limiting and it reaches the plasticity limit and causes microcrack formation. The interrelation of the average length of microcracks and their surface density with the energy density of inelastic deformation has been found.

Ključne besede

preizkušanje materialov;jedrski reaktor;tlačna posoda;ciklično obremenjevanje;ciklične deformacije;struktura dislokacije;utrujenostna razpoka;rast razpoke;lomna mehanika;material testing;nuclear reactor;pressure vessel;cyclic loading;cyclic deformation;dislocation structure;fatigue crack growth;TEM;fracture mechanics;

Podatki

Jezik: Angleški jezik
Leto izida:
Tipologija: 1.01 - Izvirni znanstveni članek
Organizacija: UM FS - Fakulteta za strojništvo
UDK: 621.1:539.42
COBISS: 9527574 Povezava se bo odprla v novem oknu
ISSN: 8756-758X
Št. ogledov: 1381
Št. prenosov: 35
Ocena: 0 (0 glasov)
Metapodatki: JSON JSON-RDF JSON-LD TURTLE N-TRIPLES XML RDFA MICRODATA DC-XML DC-RDF RDF

Ostali podatki

Sekundarni jezik: Angleški jezik
Sekundarne ključne besede: preizkušanje materialov;jedrski reaktor;tlačna posoda;ciklično obremenjevanje;ciklične deformacije;struktura dislokacije;utrujenostna razpoka;rast razpoke;lomna mehanika;
URN: URN:SI:UM:
Strani: str. 391-397
Letnik: ǂVol. ǂ28
Zvezek: ǂiss. ǂ4
Čas izdaje: Apr. 2005
ID: 8718288