Uroš Trdan (Avtor), M. Skarba (Avtor), Juan A. Porro (Avtor), Jose Luis Ocaña (Avtor), Janez Grum (Avtor)

Povzetek

The present paper aims to investigate topographical, microstructural, mechanical and tribological behaviour of precipitation hardened Al alloy subjected to massive laser shock processing (LSP) without protective coating at 2500 pulses/cm2, using three beam diameters. Wear tests under dry sliding conditions resulted in severe wear, whereas the main wear mechanisms were adhesion accompanied by abrasive wear. Nevertheless, LSP with optimal processing parameters reduce the friction coefficient and wear rate with lower degrees of adhesion and abrasion inside the wear track in comparison to the untreated sample. The enhanced tribological performance is attributed to the positive influence of LSP induced surface topography, surface compressive residual stresses (RS) and dense dislocation arrangements, as the result of high-pressure shock waves. Nonetheless, due to the narrow window of optimal parameters reduced wear resistance as a consequence of undesired thermal/softening effect due to laser ablation and melting was detected with non-optimal processing parameters.

Ključne besede

laser shock processing;aluminium alloy;wear;microhardness;residual stress;microstructure;

Podatki

Jezik: Angleški jezik
Leto izida:
Tipologija: 1.01 - Izvirni znanstveni članek
Organizacija: UL FS - Fakulteta za strojništvo
UDK: 620.1(045)
COBISS: 15941915 Povezava se bo odprla v novem oknu
ISSN: 0257-8972
Št. ogledov: 1940
Št. prenosov: 416
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;aluminijeva zlitina;obraba;mikrotrdota;zaostale napetosti;mikrostruktura;
Vrsta dela (COBISS): Članek v reviji
Konec prepovedi (OpenAIRE): 2020-05-25
Strani: str. 1-11
Zvezek: ǂVol. ǂ342
Čas izdaje: May 2018
DOI: 10.1016/j.surfcoat.2018.02.084
ID: 12950786