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

Povzetek

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 Alx form (Fe, Mn) by the action of galvanic cells.

Ključne besede

aluminijeva zlitina 7075;udarno utrjevanje;temperatura staranja;jamičasta korozija;ciklična polarizacija;aluminium alloy 7075;shot peening;ageing temperature;pitting corrosion;cyclic polarisation;intermetallic particles;

Podatki

Jezik: Angleški jezik
Leto izida:
Tipologija: 1.01 - Izvirni znanstveni članek
Organizacija: UL FS - Fakulteta za strojništvo
UDK: 620.1:621.787.6:669.715
COBISS: 105816579 Povezava se bo odprla v novem oknu
ISSN: 1996-1944
Št. ogledov: 226
Št. prenosov: 78
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: aluminijeva zlitina 7075;udarno utrjevanje;temperatura staranja;jamičasta korozija;ciklična polarizacija;
Vrsta dela (COBISS): Članek v reviji
Strani: str. 1-13
Letnik: ǂVol. ǂ15
Zvezek: ǂiss. ǂ9
Čas izdaje: Apr. 2022
DOI: 10.3390/ma15093094
ID: 15129369