Effects of laser shock processing on high cycle fatigue crack growth rate and fracture toughness of aluminium alloy 6082-T651

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

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.

• Jezik: Angleški jezik
• Ključne besede: laser shock processing, fatigue crack growth, aluminium alloys, residual sresses, fracture toughness
• 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: 25.11.2015
• Datum sprejetja članka: 16.02.2016
• Datum objave: 03.03.2016
• Leto izida: 2016
• Št. strani: Str. 444-455
• Številčenje: Vol. 87
• PID: 20.500.12556/RUL-127242
• UDK: 620.178.3:669.715(045)
• ISSN pri članku: 0142-1123
• DOI: 10.1016/j.ijfatigue.2016.02.027
• COBISS.SI-ID: 14539035
• Datum objave v RUL: 28.05.2021

Gradivo je del revije

• Naslov: International journal of fatigue
• Skrajšan naslov: Int. j. fatigue
• Založnik: Elsevier
• ISSN: 0142-1123
• COBISS.SI-ID: 25643520

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: 01.06.2016

Sekundarni jezik

• Jezik: Slovenski jezik
• Ključne besede: lasersko udarno utrjevanje, rast utrujenostne razpoke, aluminijeve zlitine, zaostale napetosti, lomna žilavost