The influence of shot peening and artificially ageing aluminium alloy 7075 on corrosion behaviour

Žagar, Sebastjan (avtor), Mrvar, Primož (avtor), Grum, Janez (avtor), Šturm, Roman (avtor)

This paper investigates the corrosion of shot peened AA7075 aluminium alloys aged at different temperatures. The surface integrity of the hardened layer was evaluated with SEM, EDS, differential scanning calorimetry, hardness, and roughness measurements, and in the end also with corrosion resistance tests. The research results indicated that there were significant differences in precipitates distribution between aluminium alloys artificially aged at different temperatures. As the ageing temperature increases, the microhardness decreases, which influences the final roughness condition of the surface layer after shot peening. The results of potentiodynamic polarisation tests indicate that shot peening enables shifting the pitting potential to positive values, which ensures slightly higher corrosion resistance. SEM images confirmed the dissolution of the aluminium matrix near the separated iron-rich phases of the Al$_x$ form (Fe, Mn) by the action of galvanic cells.

• Jezik: Angleški jezik
• Ključne besede: aluminium alloy 7075, shot peening, ageing temperature, pitting corrosion, cyclic polarisation, intermetallic particles
• Vrsta gradiva: Članek v reviji
• Tipologija: 1.01 - Izvirni znanstveni članek
• Organizacija: FS - Fakulteta za strojništvo ; NTF - Naravoslovnotehniška fakulteta
• Status publikacije: Objavljeno
• Različica publikacije: Objavljena publikacija
• Leto izida: 2022
• Št. strani: 13 str.
• Številčenje: Vol. 15, iss. 9, art. 3094
• PID: 20.500.12556/RUL-136334
• UDK: 620.1:621.787.6:669.715
• ISSN pri članku: 1996-1944
• DOI: 10.3390/ma15093094
• COBISS.SI-ID: 105816579
• Datum objave v RUL: 25.04.2022

Gradivo je del revije

• Naslov: Materials
• Skrajšan naslov: Materials
• Založnik: MDPI
• ISSN: 1996-1944
• COBISS.SI-ID: 33588485

Licence

• Licenca: CC BY 4.0, Creative Commons Priznanje avtorstva 4.0 Mednarodna
• Povezava: http://creativecommons.org/licenses/by/4.0/deed.sl
• Opis: To je standardna licenca Creative Commons, ki daje uporabnikom največ možnosti za nadaljnjo uporabo dela, pri čemer morajo navesti avtorja.

Sekundarni jezik

• Jezik: Slovenski jezik
• Ključne besede: aluminijeva zlitina 7075, udarno utrjevanje, temperatura staranja, jamičasta korozija, ciklična polarizacija

Projekti

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