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Bor, Serbia

Djokovic J.M.,University of Bor | Nikolic R.R.,University of Kragujevac | Tadic S.S.,University of Belgrade
Thermal Science | Year: 2010

In this paper is considered a problem of the semi-infinite crack at the interface between the two elastic isotropiclayers in conditions of the environmental temperature change. The energy release rate needed for the crack growth along the interface was determined, for the case when the two-layered sample is cooled from the temperature of the layers joining down to the room temperature. It was noticed that the energy release rate increases with the temperature difference increase. In the paper is also presented the distribution of stresses in layers as a function of the temperature and thelayers' thickness variations. Analysis is limited to the case when the bimaterial sample is exposed to uniform temperature. Source

Gomidzelovic L.,University of Bor | Zivkovic D.,University of Belgrade | Pozega E.,University of Bor | Cosovic V.,University of Belgrade | And 2 more authors.
Materialpruefung/Materials Testing | Year: 2015

In this publication, results are presented which have been obtained by investigation of mechanical and electrical properties of alloys belonging to Sb-Ga50Au10In40 section of quaternary Au-Ga-In-Sb system, which is the basis for the development of new lead-free solder materials. The experiments were conducted using Brinell method for hardness measurement, apparatus PTM-3 for microhardness measurement and instrument Foerster SIGMATEST 2.069 for measuring of electrical conductivity. The microstructure of samples was analyzed using optical microscopy. © Carl Hanser Verlag München. Source

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