Dedić, Milan

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  • Dedić, Milan (2)
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Author's Bibliography

Vickers hardness indentation size effect in selective laser melted MS1 maraging steel

Baloš, Sebastian; Rajnović, Dragan; Šiđanin, Leposava; Erić-Cekić, Olivera; Moraca, Slobodan; Trivković, Mirjana; Dedić, Milan

(Sage Publications Ltd, London, 2021)

TY  - JOUR
AU  - Baloš, Sebastian
AU  - Rajnović, Dragan
AU  - Šiđanin, Leposava
AU  - Erić-Cekić, Olivera
AU  - Moraca, Slobodan
AU  - Trivković, Mirjana
AU  - Dedić, Milan
PY  - 2021
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/3474
AB  - In this paper, selective laser melting fabricated specimens in non-heat-treated and heat-treated conditions were subjected to Vickers microhardness testing, by using a full range of loadings: 10, 25, 50, 100, 200, 300, 500, and 1000 g. Microhardness of longitudinal sections and cross-sections were correlated and the obtained values were plotted against loadings and indentation size effect was studied, in order to find the optimal loading range, that gives the material true microhardness, or load-independent hardness. The load dependence of the measured Vickers hardness values was described quantitatively through the application of the Meyer's law, proportional specimen resistance, and the modified proportional specimen resistance model. It was found that the microhardness rises as the loading is higher, causing a reversed indentation size effect, clearly indicating the range of true hardnesses of the tested material. Also, proportional specimen resistance and modified proportional specimen resistance models were found to have the highest correlation factors indicating their higher adequacy compared to Meyer's prediction model.
PB  - Sage Publications Ltd, London
T2  - Proceedings of The Institution of Mechanical Engineers Part C-Journal of Mechanical Engineering Scie
T1  - Vickers hardness indentation size effect in selective laser melted MS1 maraging steel
EP  - 1730
IS  - 10
SP  - 1724
VL  - 235
DO  - 10.1177/0954406219892301
ER  - 
@article{
author = "Baloš, Sebastian and Rajnović, Dragan and Šiđanin, Leposava and Erić-Cekić, Olivera and Moraca, Slobodan and Trivković, Mirjana and Dedić, Milan",
year = "2021",
abstract = "In this paper, selective laser melting fabricated specimens in non-heat-treated and heat-treated conditions were subjected to Vickers microhardness testing, by using a full range of loadings: 10, 25, 50, 100, 200, 300, 500, and 1000 g. Microhardness of longitudinal sections and cross-sections were correlated and the obtained values were plotted against loadings and indentation size effect was studied, in order to find the optimal loading range, that gives the material true microhardness, or load-independent hardness. The load dependence of the measured Vickers hardness values was described quantitatively through the application of the Meyer's law, proportional specimen resistance, and the modified proportional specimen resistance model. It was found that the microhardness rises as the loading is higher, causing a reversed indentation size effect, clearly indicating the range of true hardnesses of the tested material. Also, proportional specimen resistance and modified proportional specimen resistance models were found to have the highest correlation factors indicating their higher adequacy compared to Meyer's prediction model.",
publisher = "Sage Publications Ltd, London",
journal = "Proceedings of The Institution of Mechanical Engineers Part C-Journal of Mechanical Engineering Scie",
title = "Vickers hardness indentation size effect in selective laser melted MS1 maraging steel",
pages = "1730-1724",
number = "10",
volume = "235",
doi = "10.1177/0954406219892301"
}
Baloš, S., Rajnović, D., Šiđanin, L., Erić-Cekić, O., Moraca, S., Trivković, M.,& Dedić, M.. (2021). Vickers hardness indentation size effect in selective laser melted MS1 maraging steel. in Proceedings of The Institution of Mechanical Engineers Part C-Journal of Mechanical Engineering Scie
Sage Publications Ltd, London., 235(10), 1724-1730.
https://doi.org/10.1177/0954406219892301
Baloš S, Rajnović D, Šiđanin L, Erić-Cekić O, Moraca S, Trivković M, Dedić M. Vickers hardness indentation size effect in selective laser melted MS1 maraging steel. in Proceedings of The Institution of Mechanical Engineers Part C-Journal of Mechanical Engineering Scie. 2021;235(10):1724-1730.
doi:10.1177/0954406219892301 .
Baloš, Sebastian, Rajnović, Dragan, Šiđanin, Leposava, Erić-Cekić, Olivera, Moraca, Slobodan, Trivković, Mirjana, Dedić, Milan, "Vickers hardness indentation size effect in selective laser melted MS1 maraging steel" in Proceedings of The Institution of Mechanical Engineers Part C-Journal of Mechanical Engineering Scie, 235, no. 10 (2021):1724-1730,
https://doi.org/10.1177/0954406219892301 . .
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Analysis of the Drive Shaft Fracture of the Conveyor Belt for Transport of Coal

Savković, Mile; Dedić, Milan; Pavlović, Goran; Arsić, Miodrag; Stamenić, Zoran

(Univ Osijek, Tech Fac, Slavonski Brod, 2019)

TY  - JOUR
AU  - Savković, Mile
AU  - Dedić, Milan
AU  - Pavlović, Goran
AU  - Arsić, Miodrag
AU  - Stamenić, Zoran
PY  - 2019
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/3028
AB  - The conveyor belt for slag and coal transport in the open mine pit "Kolubara" - Serbia is driven by means of two drive drums : attached on separate shafts. Each shaft is driven by two electric motors on both sides. During exploitation, the conveyor belt drive shafts are subjected to torques and transverse forces due to belt tension. The gearboxes and the bearing units on both sides of the drive drum support each shaft. A fracture of one of the drive shafts of the conveyor belt occurred at its connection point with the gearbox. The first part of the paper defines the loads relevant for shaft calculation, based on measurements in different phases of operation and the manufacturer's data. It is followed by the FEM analysis and fatigue analysis, for the most unfavourable load case. It has been established that the critical stress value has occurred near the connection point between the shaft and the gearbox, in the fracture zone. The second part of the paper presents chemical composition and mechanical properties of material, as well as metallographic examination of fracture surface. The experimental test procedure shows that the fracture has occurred not because of an error in the material but as a consequence of the inadequate heat treatment. Superposition of two negative influences: material fatigue and inadequate heat treatment, expressed in the cross section at the point of fracture is the main case of the conveyor belt shaft fracture.
PB  - Univ Osijek, Tech Fac, Slavonski Brod
T2  - Tehnički vjesnik
T1  - Analysis of the Drive Shaft Fracture of the Conveyor Belt for Transport of Coal
EP  - 1338
IS  - 5
SP  - 1333
VL  - 26
DO  - 10.17559/TV-20181031162954
ER  - 
@article{
author = "Savković, Mile and Dedić, Milan and Pavlović, Goran and Arsić, Miodrag and Stamenić, Zoran",
year = "2019",
abstract = "The conveyor belt for slag and coal transport in the open mine pit "Kolubara" - Serbia is driven by means of two drive drums : attached on separate shafts. Each shaft is driven by two electric motors on both sides. During exploitation, the conveyor belt drive shafts are subjected to torques and transverse forces due to belt tension. The gearboxes and the bearing units on both sides of the drive drum support each shaft. A fracture of one of the drive shafts of the conveyor belt occurred at its connection point with the gearbox. The first part of the paper defines the loads relevant for shaft calculation, based on measurements in different phases of operation and the manufacturer's data. It is followed by the FEM analysis and fatigue analysis, for the most unfavourable load case. It has been established that the critical stress value has occurred near the connection point between the shaft and the gearbox, in the fracture zone. The second part of the paper presents chemical composition and mechanical properties of material, as well as metallographic examination of fracture surface. The experimental test procedure shows that the fracture has occurred not because of an error in the material but as a consequence of the inadequate heat treatment. Superposition of two negative influences: material fatigue and inadequate heat treatment, expressed in the cross section at the point of fracture is the main case of the conveyor belt shaft fracture.",
publisher = "Univ Osijek, Tech Fac, Slavonski Brod",
journal = "Tehnički vjesnik",
title = "Analysis of the Drive Shaft Fracture of the Conveyor Belt for Transport of Coal",
pages = "1338-1333",
number = "5",
volume = "26",
doi = "10.17559/TV-20181031162954"
}
Savković, M., Dedić, M., Pavlović, G., Arsić, M.,& Stamenić, Z.. (2019). Analysis of the Drive Shaft Fracture of the Conveyor Belt for Transport of Coal. in Tehnički vjesnik
Univ Osijek, Tech Fac, Slavonski Brod., 26(5), 1333-1338.
https://doi.org/10.17559/TV-20181031162954
Savković M, Dedić M, Pavlović G, Arsić M, Stamenić Z. Analysis of the Drive Shaft Fracture of the Conveyor Belt for Transport of Coal. in Tehnički vjesnik. 2019;26(5):1333-1338.
doi:10.17559/TV-20181031162954 .
Savković, Mile, Dedić, Milan, Pavlović, Goran, Arsić, Miodrag, Stamenić, Zoran, "Analysis of the Drive Shaft Fracture of the Conveyor Belt for Transport of Coal" in Tehnički vjesnik, 26, no. 5 (2019):1333-1338,
https://doi.org/10.17559/TV-20181031162954 . .
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