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16 results on '"Popovic, Olivera"'

9. THE PERCEPTION OF THE TOURIST SERVICES QUALITY WITH MODEL FOR PREDICTING THE LIKELIHOOD OF RETURNING TO THE DESTINATION.

Author

Popovic, Olivera Blagojevic, Delibasic, Milica, and Ognjanovic, Ivana

Subjects
TOURIST attractions, HOTELS, QUALITY of service, PERCEIVED quality, CUSTOMER satisfaction
Abstract

Copyright of Transformations in Business & Economics is the property of Vilnius University and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Published
2018

16. The effect of welding process and shielding atmosphere on the AlMg4.5Mn weld metal properties

Author

Cvetkovic, Radica Prokic, Popovic, Olivera, Burzic, Meri, Jovicic, Radomir, Macura, Sandra Kastelec, and Buyukyildirim, Galip

Abstract

In this paper, the AlMg4.5Mn alloy has been welded using tungsten inert gas (TIG) and metal inert gas (MIG) processes with different gas shielding atmospheres. Tensile strength, hardness, impact and fracture toughness, fatigue crack growth parameters (?Kth, da/dN), as well as microstructure were determined. By comparing results for different gas mixtures, the main conclusion for TIG welding was that increased helium content has an important effect on toughness and fatigue crack growth parameters, whereas its effect on other mechanical properties is not significant. On the other hand, in the case of MIG welding, adding helium does not affect mechanical properties, except the fatigue crack growth rate. It was also established that adding nitrogen (TIG welding) and oxygen (MIG welding) reduces toughness and increases crack growth rate, so their use in shielding mixtures is not recommended.

Published
2013
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