Sebastian Baloš (Avtor), Miroslav D. Dramićanin (Avtor), Petar Janjatovic (Avtor), Nenad Kulundzic (Avtor), Ivan Zabunov (Avtor), Branka Pilić (Avtor), Damjan Klobčar (Avtor)

Povzetek

Austenitic stainless steels represent a significant aerospace material, being used for various castings, structural components, landing gear components, afterburners, exhaust components, engine parts, and fuel tanks. The most common joining process is tungsten inert gas (TIG) welding, which possesses many advantages such as suitability to weld a wide range of ferrous and non-ferrous metals and alloys, providing high quality welds with good mechanical properties. Its major disadvantage is low productivity due to low penetration and welding speed. This can be overcome by introducing an activating flux before welding. The activating flux reverses the material flow of the weld pool, significantly increasing penetration. Therefore, shielding gas consumption is reduced and welding without a consumable is enabled. However, the consumable in conventional TIG also enables the conditioning of the mechanical properties of welds. In this study, Si and Ti metallic oxide nanoparticles were used to increase the weld penetration depth, while bend testing, tensile, and impact toughness were determined to evaluate the mechanical properties of welds. Furthermore, optical emission spectroscopy, light, and scanning electron microscope were used to determine the chemical compositions and microstructures of the welds. Chemical compositions and weld mechanical properties were similar in all specimens. The highest tensile and impact properties were obtained with the specimen welded with the flux containing 20% TiO2 and 80% SiO2 nanoparticles. Although lower than those of the base metal, they were well within the nominal base metal mechanical properties.

Ključne besede

oksidni delci;aktivirano varjenje TIG;mehanske lastnosti;nerjavno jeklo 304 L;oxide flux;activated tungsten inert gas welding;mechanical properties;304L stainless steel;

Podatki

Jezik: Angleški jezik
Leto izida:
Tipologija: 1.01 - Izvirni znanstveni članek
Organizacija: UL FS - Fakulteta za strojništvo
UDK: 621.791.75:669.14.018.8(045)
COBISS: 44227843 Povezava se bo odprla v novem oknu
ISSN: 1996-1944
Št. ogledov: 139
Št. prenosov: 66
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: oksidni delci;aktivirano varjenje TIG;mehanske lastnosti;nerjavno jeklo 304 L;
Vrsta dela (COBISS): Članek v reviji
Strani: f. 1-11
Letnik: ǂVol. ǂ13
Zvezek: ǂiss. ǂ20
Čas izdaje: Oct. 2020
DOI: 10.3390/ma13204513
ID: 14306002