TY  - JOUR
AU  - Gligorijević, Bojan R.
AU  - Vilotijević, Miroljub N.
AU  - Šćepanović, Maja J.
AU  - Radovanović, Radovan
AU  - Radović, Nenad
PY  - 2017
UR  - http://jakov.kpu.edu.rs/handle/123456789/762
AB  - The present study estimated the cracking phenomenon in as-plasma-sprayed hydroxylapatite coatings (HACs) after they were being subjected to the severe cutting conditions in the direction perpendicular to the coating/substrate interface. In order to evaluate the effects of substrate preheating on the occurrence of micro-cracks, the HACs were deposited at different initial substrate temperatures (T-S = 20, 100 and 200 degrees C). The changes in phase composition and HA splat morphology with T-S were observed and were correlated with the cracking occurrence. The results showed that severe cutting conditions introduced a localized cracking in the regions of HACs dominantly attributed to the brittle hydroxyl- deficient amorphous calcium phosphate (ACP) phase. This effect was particularly observable in the HACs deposited without preheating of substrate. On the other hand, the preheating of substrate reduced the presence of micro-cracks and caused insignificant changes in the average local phase composition. In HACs deposited with preheating of substrate, the HA splats (of which HACs are composed) were thinner and recrystallized HA regions seemed smaller in size and more evenly distributed. These results implied potentially important roles of the HA splat formation mechanism on the distribution of ACP and recrystallized HA regions in the as-plasma-sprayed HACs and the cracking resistance of HACs.
PB  - Association of Chemical Engineers of Serbia
T2  - Hemijska industrija
T1  - Cracking caused by cutting of plasma-sprayed hydroxyapatite coatings and its relation to the structural features of coatings deposited at different initial substrate temperatures
VL  - 71
IS  - 3
SP  - 241
EP  - 249
DO  - 10.2298/HEMIND160513034G
ER  - 

@article{
author = "Gligorijević, Bojan R. and Vilotijević, Miroljub N. and Šćepanović, Maja J. and Radovanović, Radovan and Radović, Nenad",
year = "2017",
abstract = "The present study estimated the cracking phenomenon in as-plasma-sprayed hydroxylapatite coatings (HACs) after they were being subjected to the severe cutting conditions in the direction perpendicular to the coating/substrate interface. In order to evaluate the effects of substrate preheating on the occurrence of micro-cracks, the HACs were deposited at different initial substrate temperatures (T-S = 20, 100 and 200 degrees C). The changes in phase composition and HA splat morphology with T-S were observed and were correlated with the cracking occurrence. The results showed that severe cutting conditions introduced a localized cracking in the regions of HACs dominantly attributed to the brittle hydroxyl- deficient amorphous calcium phosphate (ACP) phase. This effect was particularly observable in the HACs deposited without preheating of substrate. On the other hand, the preheating of substrate reduced the presence of micro-cracks and caused insignificant changes in the average local phase composition. In HACs deposited with preheating of substrate, the HA splats (of which HACs are composed) were thinner and recrystallized HA regions seemed smaller in size and more evenly distributed. These results implied potentially important roles of the HA splat formation mechanism on the distribution of ACP and recrystallized HA regions in the as-plasma-sprayed HACs and the cracking resistance of HACs.",
publisher = "Association of Chemical Engineers of Serbia",
journal = "Hemijska industrija",
title = "Cracking caused by cutting of plasma-sprayed hydroxyapatite coatings and its relation to the structural features of coatings deposited at different initial substrate temperatures",
volume = "71",
number = "3",
pages = "241-249",
doi = "10.2298/HEMIND160513034G"
}

Gligorijević, B. R., Vilotijević, M. N., Šćepanović, M. J., Radovanović, R.,& Radović, N.. (2017). Cracking caused by cutting of plasma-sprayed hydroxyapatite coatings and its relation to the structural features of coatings deposited at different initial substrate temperatures. in Hemijska industrija
Association of Chemical Engineers of Serbia., 71(3), 241-249.
https://doi.org/10.2298/HEMIND160513034G

Gligorijević BR, Vilotijević MN, Šćepanović MJ, Radovanović R, Radović N. Cracking caused by cutting of plasma-sprayed hydroxyapatite coatings and its relation to the structural features of coatings deposited at different initial substrate temperatures. in Hemijska industrija. 2017;71(3):241-249.
doi:10.2298/HEMIND160513034G .

Gligorijević, Bojan R., Vilotijević, Miroljub N., Šćepanović, Maja J., Radovanović, Radovan, Radović, Nenad, "Cracking caused by cutting of plasma-sprayed hydroxyapatite coatings and its relation to the structural features of coatings deposited at different initial substrate temperatures" in Hemijska industrija, 71, no. 3 (2017):241-249,
https://doi.org/10.2298/HEMIND160513034G . .

TY  - JOUR
AU  - Milašinović, Veljko D.
AU  - Radovanović, Radovan
AU  - Milašinović, Mijat D.
AU  - Gligorijević, Bojan R.
PY  - 2016
UR  - http://jakov.kpu.edu.rs/handle/123456789/733
AB  - The objective of this research is to consider the effects of certain parameters of the friction-welding process on the morphology of an aluminum/copper joint. The effect of the following parameters was monitored: the operating time, the operating pressure, the forging time and the forging pressure. The speed was constant during the binding process and reached 1500 min(-1). The preparation of the welding materials was performed in accordance with the industrial production conditions. With the SEM-EDS analysis, it was found that the morphology of the Al/Cu interface slightly changes when we change the distance from the rotation axis, irrespective of the combination of the friction-welding parameters. Apart from this, the joined effects of the operating pressure of 48 MPa and the forging pressure of 160 MPa caused a morphological change of the Al/Cu interface, while the forging time at the moment of the combined pressurizing effect significantly influenced the modification of the Al/Cu interface shape within a very narrow time interval of only a few seconds.
PB  - Institute of Metals and Technology
T2  - Materiali in tehnologije
T1  - Effects of friction-welding parameters on the morphological properties of an Al/Cu bimetallic joint
VL  - 50
IS  - 1
SP  - 89
EP  - 94
DO  - 10.17222/mit.2014.304
ER  - 

@article{
author = "Milašinović, Veljko D. and Radovanović, Radovan and Milašinović, Mijat D. and Gligorijević, Bojan R.",
year = "2016",
abstract = "The objective of this research is to consider the effects of certain parameters of the friction-welding process on the morphology of an aluminum/copper joint. The effect of the following parameters was monitored: the operating time, the operating pressure, the forging time and the forging pressure. The speed was constant during the binding process and reached 1500 min(-1). The preparation of the welding materials was performed in accordance with the industrial production conditions. With the SEM-EDS analysis, it was found that the morphology of the Al/Cu interface slightly changes when we change the distance from the rotation axis, irrespective of the combination of the friction-welding parameters. Apart from this, the joined effects of the operating pressure of 48 MPa and the forging pressure of 160 MPa caused a morphological change of the Al/Cu interface, while the forging time at the moment of the combined pressurizing effect significantly influenced the modification of the Al/Cu interface shape within a very narrow time interval of only a few seconds.",
publisher = "Institute of Metals and Technology",
journal = "Materiali in tehnologije",
title = "Effects of friction-welding parameters on the morphological properties of an Al/Cu bimetallic joint",
volume = "50",
number = "1",
pages = "89-94",
doi = "10.17222/mit.2014.304"
}

Milašinović, V. D., Radovanović, R., Milašinović, M. D.,& Gligorijević, B. R.. (2016). Effects of friction-welding parameters on the morphological properties of an Al/Cu bimetallic joint. in Materiali in tehnologije
Institute of Metals and Technology., 50(1), 89-94.
https://doi.org/10.17222/mit.2014.304

Milašinović VD, Radovanović R, Milašinović MD, Gligorijević BR. Effects of friction-welding parameters on the morphological properties of an Al/Cu bimetallic joint. in Materiali in tehnologije. 2016;50(1):89-94.
doi:10.17222/mit.2014.304 .

Milašinović, Veljko D., Radovanović, Radovan, Milašinović, Mijat D., Gligorijević, Bojan R., "Effects of friction-welding parameters on the morphological properties of an Al/Cu bimetallic joint" in Materiali in tehnologije, 50, no. 1 (2016):89-94,
https://doi.org/10.17222/mit.2014.304 . .