Application of massive laser shock processing for improvement of mechanical and tribological properties

Trdan, Uroš (avtor), Skarba, M. (avtor), Porro, Juan Antonio (avtor), Ocaña, José Luis (avtor), Grum, Janez (avtor)

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.

• Jezik: Angleški jezik
• Ključne besede: laser shock processing, aluminium alloy, wear, microhardness, residual stress, microstructure
• Vrsta gradiva: Članek v reviji
• Tipologija: 1.01 - Izvirni znanstveni članek
• Organizacija: FS - Fakulteta za strojništvo
• Status publikacije: Objavljeno
• Različica publikacije: Recenzirani rokopis
• Poslano v recenzijo: 15.11.2017
• Datum sprejetja članka: 21.02.2018
• Datum objave: 15.03.2018
• Leto izida: 2018
• Št. strani: Str. 1-11
• Številčenje: Vol. 342
• PID: 20.500.12556/RUL-127244
• UDK: 620.1(045)
• ISSN pri članku: 0257-8972
• DOI: 10.1016/j.surfcoat.2018.02.084
• COBISS.SI-ID: 15941915
• Datum objave v RUL: 28.05.2021

Gradivo je del revije

• Naslov: Surface & coatings technology
• Skrajšan naslov: Surf. coat. technol.
• Založnik: Elsevier
• ISSN: 0257-8972
• COBISS.SI-ID: 3084815

Licence

• Licenca: CC BY-NC-ND 4.0, Creative Commons Priznanje avtorstva-Nekomercialno-Brez predelav 4.0 Mednarodna
• Povezava: http://creativecommons.org/licenses/by-nc-nd/4.0/deed.sl
• Opis: Najbolj omejujoča licenca Creative Commons. Uporabniki lahko prenesejo in delijo delo v nekomercialne namene in ga ne smejo uporabiti za nobene druge namene.
• Začetek licenciranja: 25.05.2018

Sekundarni jezik

• Jezik: Slovenski jezik
• Ključne besede: lasersko udarno utrjevanje, aluminijeva zlitina, obraba, mikrotrdota, zaostale napetosti, mikrostruktura

Projekti

• Financer: ARRS - Agencija za raziskovalno dejavnost Republike Slovenije
• Številka projekta: P2-0270
• Naslov: Proizvodni sistemi, laserske tehnologije in spajanje materialov