Zoran Bergant (Avtor), Uroš Trdan (Avtor), Janez Grum (Avtor)

Povzetek

The effects of laser shock processing without protective coating on high-cycle fatigue crack growth and fracture toughness were investigated. Laser shock peening treatment was performed on compact tension specimens from both sides perpendicular to the crack growth direction, followed by subsequent grinding. Fatigue crack growth tests were performed at frequencies between 116 and 146 Hz, at R = 0.1 and a constant stress intensity range during the fatigue crack initiation phase and K-decreasing test. A lower number of cycles was required to initiate a fatigue precrack, and faster fatigue crack growth was found in tensile residual stress field of LSP-treated specimens. The crack growth threshold decreased by 60% after LSP treatment. The fracture toughness decreased by 28-33% after LSP treatment. The fatigue-to-ductile transition boundary on fractographic surfaces show linear fatigue crack fronts in non-treated specimens and curves after LSP treatment.

Ključne besede

lasersko udarno utrjevanje;rast utrujenostne razpoke;aluminijeve zlitine;zaostale napetosti;lomna žilavost;laser shock processing;fatigue crack growth;aluminium alloys;residual sresses;fracture toughness;

Podatki

Jezik: Angleški jezik
Leto izida:
Tipologija: 1.01 - Izvirni znanstveni članek
Organizacija: UL FS - Fakulteta za strojništvo
UDK: 620.178.3:669.715(045)
COBISS: 14539035 Povezava se bo odprla v novem oknu
ISSN: 0142-1123
Št. ogledov: 348
Št. prenosov: 155
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: Slovenski jezik
Sekundarne ključne besede: lasersko udarno utrjevanje;rast utrujenostne razpoke;aluminijeve zlitine;zaostale napetosti;lomna žilavost;
Vrsta dela (COBISS): Članek v reviji
Konec prepovedi (OpenAIRE): 2018-06-01
Strani: str. 444-455
Zvezek: ǂVol. ǂ87
Čas izdaje: Jun. 2016
DOI: 10.1016/j.ijfatigue.2016.02.027
ID: 12950782