Mitjan Kalin (Avtor), Blaž Brodnik Žugelj (Avtor), Martin Lamut (Avtor), Karim Hamouda (Avtor)

Povzetek

How the contact behaviours of steel engineering surfaces with different roughnesses (R$_a$ = 0.1, 0.6 and 1.0 µm) are affected by the asperity work-hardening and the deformation regime are described here. Large values of the plasticity index Ψ between 20 and 50 indicate that all the surfaces should undergo a full plastic deformation. However, in the loading range up to the yield stress (on a nominal contact area) the rough surfaces exhibited at least 10 % elastic deformation, while for the smooth surfaces the elastic deformation was as much as 44 %. During the loading, the work-hardening increased the hardness of the rough surfaces by up to 63 %, and that of the smooth surfaces by up to 20 %. However, the asperities were able to carry the load that resulted in as much as a 4–10-times-higher contact pressure than the (initial) bulk yield strength. The proposed contact mechanisms for such an increased asperity-load-carrying capacity depend on the surface roughness. For the rough surfaces this is due to the work-hardening, while for the smooth surfaces the dominant mechanisms enhancing the load-carrying capacity are the work-hardening combined with the hydrostatic bulk stresses.

Ključne besede

in-situ asperity experiment;multi-asperity contacts;real contact area;work-hardening;deformation;steel;roughness;

Podatki

Jezik: Angleški jezik
Leto izida:
Tipologija: 1.01 - Izvirni znanstveni članek
Organizacija: UL FS - Fakulteta za strojništvo
UDK: 539.92
COBISS: 129711619 Povezava se bo odprla v novem oknu
ISSN: 0301-679X
Št. ogledov: 1553
Št. prenosov: 265
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: in-situ eksperimenti;kontakti več vršičkov;realna kontaktna površina;utrjevanje;deformacija;jeklo;hrapavost;
Vrsta dela (COBISS): Članek v reviji
Strani: str. 1-9
Letnik: ǂVol. ǂ178
Zvezek: ǂpt. ǂA
Čas izdaje: Feb. 2023
DOI: 10.1016/j.triboint.2022.108067
ID: 17111295