TY  - JOUR
AU  - Bobić, Biljana
AU  - Jegdić, Bore
AU  - Jugović, Branimir
AU  - Stevanović, Jasmina
AU  - Gligorijević, Bojan
AU  - Murariu, Alin
PY  - 2016
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3171
AB  - Causes of failure of brass condenser tubes (CuZn28Sn1) in a thermal power plant in Serbia are analysed. Results of testing by Fourier transformed infrared spectroscopy (FTIR) have indicated the presence of ammonia and nitrogen compounds on fracture surfaces and on the inner surface of the tubes. These compounds are specific agents that cause stress corrosion cracking (SCC) in brass. Analysis of fracture surfaces using scanning electron microscopy (SEM) has shown the brittle transgranular fracture due to the occurrence of SCC. The resistance of brass condenser tubes to other types of corrosion, such as erosion, general and selective corrosion (dezincification) is also considered. Some procedures are proposed to reduce the risk of SCC in the brass condenser tubes.
PB  - Society for Structural Integrity and Life, Institute for Material Testing
T2  - Structural Integrity and Life
T1  - Failures of brass condenser tubes
EP  - 23
IS  - 1
SP  - 19
VL  - 16
UR  - https://hdl.handle.net/21.15107/rcub_technorep_3171
ER  - 

@article{
author = "Bobić, Biljana and Jegdić, Bore and Jugović, Branimir and Stevanović, Jasmina and Gligorijević, Bojan and Murariu, Alin",
year = "2016",
abstract = "Causes of failure of brass condenser tubes (CuZn28Sn1) in a thermal power plant in Serbia are analysed. Results of testing by Fourier transformed infrared spectroscopy (FTIR) have indicated the presence of ammonia and nitrogen compounds on fracture surfaces and on the inner surface of the tubes. These compounds are specific agents that cause stress corrosion cracking (SCC) in brass. Analysis of fracture surfaces using scanning electron microscopy (SEM) has shown the brittle transgranular fracture due to the occurrence of SCC. The resistance of brass condenser tubes to other types of corrosion, such as erosion, general and selective corrosion (dezincification) is also considered. Some procedures are proposed to reduce the risk of SCC in the brass condenser tubes.",
publisher = "Society for Structural Integrity and Life, Institute for Material Testing",
journal = "Structural Integrity and Life",
title = "Failures of brass condenser tubes",
pages = "23-19",
number = "1",
volume = "16",
url = "https://hdl.handle.net/21.15107/rcub_technorep_3171"
}

Bobić, B., Jegdić, B., Jugović, B., Stevanović, J., Gligorijević, B.,& Murariu, A.. (2016). Failures of brass condenser tubes. in Structural Integrity and Life
Society for Structural Integrity and Life, Institute for Material Testing., 16(1), 19-23.
https://hdl.handle.net/21.15107/rcub_technorep_3171

Bobić B, Jegdić B, Jugović B, Stevanović J, Gligorijević B, Murariu A. Failures of brass condenser tubes. in Structural Integrity and Life. 2016;16(1):19-23.
https://hdl.handle.net/21.15107/rcub_technorep_3171 .

Bobić, Biljana, Jegdić, Bore, Jugović, Branimir, Stevanović, Jasmina, Gligorijević, Bojan, Murariu, Alin, "Failures of brass condenser tubes" in Structural Integrity and Life, 16, no. 1 (2016):19-23,
https://hdl.handle.net/21.15107/rcub_technorep_3171 .

TY  - JOUR
AU  - Jegdić, Bore V.
AU  - Ostojić, Stevan I.
AU  - Bobić, Biljana
AU  - Alil, Ana
PY  - 2013
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/6091
AB  - The paper describes structural changes in the welded joints, leading to the emergence of intergranular corrosion (IGC) during exploitation. The occurrence of intergranular corrosion in welded joints of austenitic, ferritic and duplex stainless steels and in welded joints of aluminium alloys and nickel alloys is analysed. Special attention was paid to austenitic stainless steels, due to their wide application in practice. In addition to sensitization in the weld heat-affected zone (HAZ), which results in degradation of the welded joint (“weld decay”), also considered is the sensitization that occurs close to the weld metal in the stabilized steel, which leads to a “knife line attack”. Considerable attention is devoted to describing the various procedures in order to prevent the sensitization of the welded joints.
T2  - INTEGRITET I VEK KONSTRUKCIJA
T1  - INTERGRANULAR CORROSION OF WELDED JOINTS. FORMING CONDITIONS AND PROCEDURES FOR PREVENTION
EP  - 97
IS  - 2
SP  - 93
VL  - 13
UR  - https://hdl.handle.net/21.15107/rcub_technorep_6091
ER  - 

@article{
author = "Jegdić, Bore V. and Ostojić, Stevan I. and Bobić, Biljana and Alil, Ana",
year = "2013",
abstract = "The paper describes structural changes in the welded joints, leading to the emergence of intergranular corrosion (IGC) during exploitation. The occurrence of intergranular corrosion in welded joints of austenitic, ferritic and duplex stainless steels and in welded joints of aluminium alloys and nickel alloys is analysed. Special attention was paid to austenitic stainless steels, due to their wide application in practice. In addition to sensitization in the weld heat-affected zone (HAZ), which results in degradation of the welded joint (“weld decay”), also considered is the sensitization that occurs close to the weld metal in the stabilized steel, which leads to a “knife line attack”. Considerable attention is devoted to describing the various procedures in order to prevent the sensitization of the welded joints.",
journal = "INTEGRITET I VEK KONSTRUKCIJA",
title = "INTERGRANULAR CORROSION OF WELDED JOINTS. FORMING CONDITIONS AND PROCEDURES FOR PREVENTION",
pages = "97-93",
number = "2",
volume = "13",
url = "https://hdl.handle.net/21.15107/rcub_technorep_6091"
}

Jegdić, B. V., Ostojić, S. I., Bobić, B.,& Alil, A.. (2013). INTERGRANULAR CORROSION OF WELDED JOINTS. FORMING CONDITIONS AND PROCEDURES FOR PREVENTION. in INTEGRITET I VEK KONSTRUKCIJA, 13(2), 93-97.
https://hdl.handle.net/21.15107/rcub_technorep_6091

Jegdić BV, Ostojić SI, Bobić B, Alil A. INTERGRANULAR CORROSION OF WELDED JOINTS. FORMING CONDITIONS AND PROCEDURES FOR PREVENTION. in INTEGRITET I VEK KONSTRUKCIJA. 2013;13(2):93-97.
https://hdl.handle.net/21.15107/rcub_technorep_6091 .

Jegdić, Bore V., Ostojić, Stevan I., Bobić, Biljana, Alil, Ana, "INTERGRANULAR CORROSION OF WELDED JOINTS. FORMING CONDITIONS AND PROCEDURES FOR PREVENTION" in INTEGRITET I VEK KONSTRUKCIJA, 13, no. 2 (2013):93-97,
https://hdl.handle.net/21.15107/rcub_technorep_6091 .

TY  - CONF
AU  - Bobić, Biljana
AU  - Jegdić, Bore V.
AU  - Alil, Ana
AU  - Radosavljević, Miroslav
PY  - 2012
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/6113
AB  - Interkristalna, naponska, galvanska, piting korozija i korozija u zazorima se često javljaju u zavarenim spojevima. Opisani su uslovi pri kojima dolazi do pojave navedenih oblika korozije. Posebno su razmatrani slučajevi korozije zavarenih spojeva u praksi. Za svaki pojedinačan slučaj korozije objašnjeni su uzroci nastanka i uslovi odigravanja procesa korozije. Navedeni su postupci i mere koje treba preduzeti u cilju sprečavanja korozije zavarenog spoja u konkretnom slučaju, kao i u slučaju zavarenih spojeva različitih metala i legura uopšte.
PB  - Društvo za unapređivanje zavarivanja u Srbij - DUZS. Beograd, Srbija, Divčibare, Srbija
C3  - 27. savetovanje sa međunarodnim učešćem ZAVARIVANJE 2012
T1  - Corrosion of Welded Joints - Case Studies
EP  - 8
SP  - 1
UR  - https://hdl.handle.net/21.15107/rcub_technorep_6113
ER  - 

@conference{
author = "Bobić, Biljana and Jegdić, Bore V. and Alil, Ana and Radosavljević, Miroslav",
year = "2012",
abstract = "Interkristalna, naponska, galvanska, piting korozija i korozija u zazorima se često javljaju u zavarenim spojevima. Opisani su uslovi pri kojima dolazi do pojave navedenih oblika korozije. Posebno su razmatrani slučajevi korozije zavarenih spojeva u praksi. Za svaki pojedinačan slučaj korozije objašnjeni su uzroci nastanka i uslovi odigravanja procesa korozije. Navedeni su postupci i mere koje treba preduzeti u cilju sprečavanja korozije zavarenog spoja u konkretnom slučaju, kao i u slučaju zavarenih spojeva različitih metala i legura uopšte.",
publisher = "Društvo za unapređivanje zavarivanja u Srbij - DUZS. Beograd, Srbija, Divčibare, Srbija",
journal = "27. savetovanje sa međunarodnim učešćem ZAVARIVANJE 2012",
title = "Corrosion of Welded Joints - Case Studies",
pages = "8-1",
url = "https://hdl.handle.net/21.15107/rcub_technorep_6113"
}

Bobić, B., Jegdić, B. V., Alil, A.,& Radosavljević, M.. (2012). Corrosion of Welded Joints - Case Studies. in 27. savetovanje sa međunarodnim učešćem ZAVARIVANJE 2012
Društvo za unapređivanje zavarivanja u Srbij - DUZS. Beograd, Srbija, Divčibare, Srbija., 1-8.
https://hdl.handle.net/21.15107/rcub_technorep_6113

Bobić B, Jegdić BV, Alil A, Radosavljević M. Corrosion of Welded Joints - Case Studies. in 27. savetovanje sa međunarodnim učešćem ZAVARIVANJE 2012. 2012;:1-8.
https://hdl.handle.net/21.15107/rcub_technorep_6113 .

Bobić, Biljana, Jegdić, Bore V., Alil, Ana, Radosavljević, Miroslav, "Corrosion of Welded Joints - Case Studies" in 27. savetovanje sa međunarodnim učešćem ZAVARIVANJE 2012 (2012):1-8,
https://hdl.handle.net/21.15107/rcub_technorep_6113 .

TY  - CONF
AU  - Jegdić, Bore V.
AU  - Bobić, Biljana
AU  - Alil, Ana
PY  - 2012
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/6112
AB  - U radu je analizirana pojava i metode ispitivanja interkristalne korozije (IKK) zavarenih spojeva austenitnih, feritnih i dupleks nerđajućih čelika, kao i zavarenih spojeva aluminijumskih legura i legura nikla. Posebna pažnja posvećena je austenitnim nerđajućim čelicima, s obzirom na njihovu široku primenu u praksi. Klasične metode ispitivanja u ključalim rastvorima kiselina još uvek imaju veliku primenu u praksi. Njihov najvažniji nedostatak je dugo vreme trajanja ispitivanja (do 240 h). Tabelarno su prikazane osnovne karakteristike tih metoda, navedeni metali i legure na koje se metode mogu primeniti, faze u zavarenom spoju na koje deluje rastvor, temperatura i vreme trajanja ispitivanja. Posebna pažnja posvećena je elektrohemijskim metodama za ispitivanje IKK. Ove metode se u novije vreme sve više primenjuju, s obzirom na kvantitativni karakter dobijenih rezultata kao i kratko vreme ispitivanja (od nekoliko minuta do jednog sata).
PB  - Društvo za unapređivanje zavarivanja u Srbij - DUZS, Beograd, Srbija, Divčibare, Srbija
C3  - 27. savetovanje sa međunarodnim učešćem ZAVARIVANJE 2012
T1  - Test Methods for the Intergranular Corrosion Welded Joints
EP  - 8
SP  - 1
UR  - https://hdl.handle.net/21.15107/rcub_technorep_6112
ER  - 

@conference{
author = "Jegdić, Bore V. and Bobić, Biljana and Alil, Ana",
year = "2012",
abstract = "U radu je analizirana pojava i metode ispitivanja interkristalne korozije (IKK) zavarenih spojeva austenitnih, feritnih i dupleks nerđajućih čelika, kao i zavarenih spojeva aluminijumskih legura i legura nikla. Posebna pažnja posvećena je austenitnim nerđajućim čelicima, s obzirom na njihovu široku primenu u praksi. Klasične metode ispitivanja u ključalim rastvorima kiselina još uvek imaju veliku primenu u praksi. Njihov najvažniji nedostatak je dugo vreme trajanja ispitivanja (do 240 h). Tabelarno su prikazane osnovne karakteristike tih metoda, navedeni metali i legure na koje se metode mogu primeniti, faze u zavarenom spoju na koje deluje rastvor, temperatura i vreme trajanja ispitivanja. Posebna pažnja posvećena je elektrohemijskim metodama za ispitivanje IKK. Ove metode se u novije vreme sve više primenjuju, s obzirom na kvantitativni karakter dobijenih rezultata kao i kratko vreme ispitivanja (od nekoliko minuta do jednog sata).",
publisher = "Društvo za unapređivanje zavarivanja u Srbij - DUZS, Beograd, Srbija, Divčibare, Srbija",
journal = "27. savetovanje sa međunarodnim učešćem ZAVARIVANJE 2012",
title = "Test Methods for the Intergranular Corrosion Welded Joints",
pages = "8-1",
url = "https://hdl.handle.net/21.15107/rcub_technorep_6112"
}

Jegdić, B. V., Bobić, B.,& Alil, A.. (2012). Test Methods for the Intergranular Corrosion Welded Joints. in 27. savetovanje sa međunarodnim učešćem ZAVARIVANJE 2012
Društvo za unapređivanje zavarivanja u Srbij - DUZS, Beograd, Srbija, Divčibare, Srbija., 1-8.
https://hdl.handle.net/21.15107/rcub_technorep_6112

Jegdić BV, Bobić B, Alil A. Test Methods for the Intergranular Corrosion Welded Joints. in 27. savetovanje sa međunarodnim učešćem ZAVARIVANJE 2012. 2012;:1-8.
https://hdl.handle.net/21.15107/rcub_technorep_6112 .

Jegdić, Bore V., Bobić, Biljana, Alil, Ana, "Test Methods for the Intergranular Corrosion Welded Joints" in 27. savetovanje sa međunarodnim učešćem ZAVARIVANJE 2012 (2012):1-8,
https://hdl.handle.net/21.15107/rcub_technorep_6112 .

TY  - CONF
AU  - Alil, Ana
AU  - Jegdić, Bore V.
AU  - Bobić, Biljana
AU  - Ristić, Marko
PY  - 2012
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/6102
AB  - The variation of factors such as the amount of alloying elements in solid solution, thermal and
thermo-mechanical treatments changes the corrosion tendency in the Al-Zn-Mg-Cu alloy. The measurements of
electrical conductivity enabled the estimation of the structural state of the alloy, i.e. the type and the degree of
precipitation.The corrosion behaviour was examined through three electrochemical methods(Ecorr., polarization
measurements, EIS).The measurement of corrosion potentials (Ecorr.) gave information about the distribution of
the alloying elements between the solid solution and the precipitation phases. The polarization measurements
have shown a more positive value of pitting potential (Epit.) and a greater resistance to corrosionfor the two-step
aged alloy. The electrochemical impedance spectroscopy (EIS) has also shown that the two-step aged alloy has
better corrosion propertiescompared to the one-step aged alloy.The fracture mechanics (FM) method wasused for
SCC testing and hasshown that the alloy after two-step precipitation hardening is significantly more resistant to
SCC. The obtained results enable a greaterinsight into the effects of both heat treatment and alloying elements,
primarily copper, on the corrosion resistance of the alloy.
PB  - Technical faculty Mihajlo Pupin, Zrenjanin, University of Novi Sad, Srbija
C3  - 2nd INTERNATIONAL CONFERENCE Industrial Engineering and Environmental Protection 2012
T1  - CORROSION BEHAVIOUR OF AN Al-Zn-Mg-Cu ALLOY AFTER DIFFERENT HEAT TREATMENTS
EP  - 128
SP  - 121
UR  - https://hdl.handle.net/21.15107/rcub_technorep_6102
ER  - 

@conference{
author = "Alil, Ana and Jegdić, Bore V. and Bobić, Biljana and Ristić, Marko",
year = "2012",
abstract = "The variation of factors such as the amount of alloying elements in solid solution, thermal and
thermo-mechanical treatments changes the corrosion tendency in the Al-Zn-Mg-Cu alloy. The measurements of
electrical conductivity enabled the estimation of the structural state of the alloy, i.e. the type and the degree of
precipitation.The corrosion behaviour was examined through three electrochemical methods(Ecorr., polarization
measurements, EIS).The measurement of corrosion potentials (Ecorr.) gave information about the distribution of
the alloying elements between the solid solution and the precipitation phases. The polarization measurements
have shown a more positive value of pitting potential (Epit.) and a greater resistance to corrosionfor the two-step
aged alloy. The electrochemical impedance spectroscopy (EIS) has also shown that the two-step aged alloy has
better corrosion propertiescompared to the one-step aged alloy.The fracture mechanics (FM) method wasused for
SCC testing and hasshown that the alloy after two-step precipitation hardening is significantly more resistant to
SCC. The obtained results enable a greaterinsight into the effects of both heat treatment and alloying elements,
primarily copper, on the corrosion resistance of the alloy.",
publisher = "Technical faculty Mihajlo Pupin, Zrenjanin, University of Novi Sad, Srbija",
journal = "2nd INTERNATIONAL CONFERENCE Industrial Engineering and Environmental Protection 2012",
title = "CORROSION BEHAVIOUR OF AN Al-Zn-Mg-Cu ALLOY AFTER DIFFERENT HEAT TREATMENTS",
pages = "128-121",
url = "https://hdl.handle.net/21.15107/rcub_technorep_6102"
}

Alil, A., Jegdić, B. V., Bobić, B.,& Ristić, M.. (2012). CORROSION BEHAVIOUR OF AN Al-Zn-Mg-Cu ALLOY AFTER DIFFERENT HEAT TREATMENTS. in 2nd INTERNATIONAL CONFERENCE Industrial Engineering and Environmental Protection 2012
Technical faculty Mihajlo Pupin, Zrenjanin, University of Novi Sad, Srbija., 121-128.
https://hdl.handle.net/21.15107/rcub_technorep_6102

Alil A, Jegdić BV, Bobić B, Ristić M. CORROSION BEHAVIOUR OF AN Al-Zn-Mg-Cu ALLOY AFTER DIFFERENT HEAT TREATMENTS. in 2nd INTERNATIONAL CONFERENCE Industrial Engineering and Environmental Protection 2012. 2012;:121-128.
https://hdl.handle.net/21.15107/rcub_technorep_6102 .

Alil, Ana, Jegdić, Bore V., Bobić, Biljana, Ristić, Marko, "CORROSION BEHAVIOUR OF AN Al-Zn-Mg-Cu ALLOY AFTER DIFFERENT HEAT TREATMENTS" in 2nd INTERNATIONAL CONFERENCE Industrial Engineering and Environmental Protection 2012 (2012):121-128,
https://hdl.handle.net/21.15107/rcub_technorep_6102 .

TY  - CONF
AU  - Alil, Ana
AU  - Jegdić, Bore V.
AU  - Bobić, Biljana
AU  - Radosavljević, Miroslav
AU  - Katavić, Boris
PY  - 2012
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/6093
AB  - Stress corrosion cracking (SCC) was tested in a high strength 7000 series aluminium alloy applied for
weapons and military equipment. The effect of one step- and two-step precipitation hardening (aging) on SCC was
investigated. The slow strain rate test (SSRT) and the fracture mechanics (FM) method were used for SCC testing. The
measurements of electrical resistivity allowed evaluating an aging degree in the tested alloy. Both testing methods have
shown that the alloy after two-step precipitation hardening is significantly more resistant to SCC. The critical stress
intensity factor for SCC, KISCC is significantly higher, and the crack growth rate on the plateau, vpl is more than one
order of magnitude lower for the alloy in this state. Processes that take place at the crack tip are proposed and the
effect of copper was analyzed. The effect of the testing solution (NaCl) temperature on the vpl was determined. Two
values of the apparent activation energy, Ea, were obtained; one value (46.6 kJ mol-1) refers to higher temperatures,
while the other (70.4 kJ mol-1) refers to lower test temperatures. These values of Ea correspond to the different
processes that control the vpl, at higher and lower temperatures.
PB  - Military Technical Institute
C3  - 5th International Scientific Conference on Defensive Technologies
T1  - STRESS CORROSION CRACKING OF AN AL-ZN-MG-CU ALLOY AFTER DIFFERENT PRECIPITATION HARDENING TREATMENTS
EP  - 587
SP  - 582
UR  - https://hdl.handle.net/21.15107/rcub_technorep_6093
ER  - 

@conference{
author = "Alil, Ana and Jegdić, Bore V. and Bobić, Biljana and Radosavljević, Miroslav and Katavić, Boris",
year = "2012",
abstract = "Stress corrosion cracking (SCC) was tested in a high strength 7000 series aluminium alloy applied for
weapons and military equipment. The effect of one step- and two-step precipitation hardening (aging) on SCC was
investigated. The slow strain rate test (SSRT) and the fracture mechanics (FM) method were used for SCC testing. The
measurements of electrical resistivity allowed evaluating an aging degree in the tested alloy. Both testing methods have
shown that the alloy after two-step precipitation hardening is significantly more resistant to SCC. The critical stress
intensity factor for SCC, KISCC is significantly higher, and the crack growth rate on the plateau, vpl is more than one
order of magnitude lower for the alloy in this state. Processes that take place at the crack tip are proposed and the
effect of copper was analyzed. The effect of the testing solution (NaCl) temperature on the vpl was determined. Two
values of the apparent activation energy, Ea, were obtained; one value (46.6 kJ mol-1) refers to higher temperatures,
while the other (70.4 kJ mol-1) refers to lower test temperatures. These values of Ea correspond to the different
processes that control the vpl, at higher and lower temperatures.",
publisher = "Military Technical Institute",
journal = "5th International Scientific Conference on Defensive Technologies",
title = "STRESS CORROSION CRACKING OF AN AL-ZN-MG-CU ALLOY AFTER DIFFERENT PRECIPITATION HARDENING TREATMENTS",
pages = "587-582",
url = "https://hdl.handle.net/21.15107/rcub_technorep_6093"
}

Alil, A., Jegdić, B. V., Bobić, B., Radosavljević, M.,& Katavić, B.. (2012). STRESS CORROSION CRACKING OF AN AL-ZN-MG-CU ALLOY AFTER DIFFERENT PRECIPITATION HARDENING TREATMENTS. in 5th International Scientific Conference on Defensive Technologies
Military Technical Institute., 582-587.
https://hdl.handle.net/21.15107/rcub_technorep_6093

Alil A, Jegdić BV, Bobić B, Radosavljević M, Katavić B. STRESS CORROSION CRACKING OF AN AL-ZN-MG-CU ALLOY AFTER DIFFERENT PRECIPITATION HARDENING TREATMENTS. in 5th International Scientific Conference on Defensive Technologies. 2012;:582-587.
https://hdl.handle.net/21.15107/rcub_technorep_6093 .

Alil, Ana, Jegdić, Bore V., Bobić, Biljana, Radosavljević, Miroslav, Katavić, Boris, "STRESS CORROSION CRACKING OF AN AL-ZN-MG-CU ALLOY AFTER DIFFERENT PRECIPITATION HARDENING TREATMENTS" in 5th International Scientific Conference on Defensive Technologies (2012):582-587,
https://hdl.handle.net/21.15107/rcub_technorep_6093 .