TY  - JOUR
AU  - Ebersold, Zoran
AU  - Mitrović, Nebojša
AU  - Đukić, Slobodan
AU  - Peulić, Aleksandar
AU  - Obradović, Dragiša
PY  - 2013
UR  - https://gery.gef.bg.ac.rs/handle/123456789/542
AB  - During the ultrasound defectoscopy the ultrasound absorption factor inside the material is raised to the fourth power of frequency. In conjunction with the previously stated, the attenuation of the sound signal which is caused by the reflections of the sound inside the sample, the application of high frequency ultrasound in porous and hollow materials is very limited or even impossible. The frequencies are the reason for this, because they are in the range of just several megahertz, which are currently the main trend in the ultrasound examination. This paper presents a principle of this new method, including the experimental results from its application on the typical represent of product packaging material. Also, it is shown that the expressed absorption of ultrasound waves from porous and hollow structures can be avoided by applying the method with such low frequencies.
PB  - Carl Hanser Verlag, Munich
T2  - Materials Testing
T1  - Low Frequencies for Cardboard Quality Assurance
VL  - 55
IS  - 2
SP  - 109
EP  - 113
DO  - 10.3139/120.110417
UR  - https://hdl.handle.net/21.15107/rcub_gery_542
ER  - 

@article{
author = "Ebersold, Zoran and Mitrović, Nebojša and Đukić, Slobodan and Peulić, Aleksandar and Obradović, Dragiša",
year = "2013",
abstract = "During the ultrasound defectoscopy the ultrasound absorption factor inside the material is raised to the fourth power of frequency. In conjunction with the previously stated, the attenuation of the sound signal which is caused by the reflections of the sound inside the sample, the application of high frequency ultrasound in porous and hollow materials is very limited or even impossible. The frequencies are the reason for this, because they are in the range of just several megahertz, which are currently the main trend in the ultrasound examination. This paper presents a principle of this new method, including the experimental results from its application on the typical represent of product packaging material. Also, it is shown that the expressed absorption of ultrasound waves from porous and hollow structures can be avoided by applying the method with such low frequencies.",
publisher = "Carl Hanser Verlag, Munich",
journal = "Materials Testing",
title = "Low Frequencies for Cardboard Quality Assurance",
volume = "55",
number = "2",
pages = "109-113",
doi = "10.3139/120.110417",
url = "https://hdl.handle.net/21.15107/rcub_gery_542"
}

Ebersold, Z., Mitrović, N., Đukić, S., Peulić, A.,& Obradović, D.. (2013). Low Frequencies for Cardboard Quality Assurance. in Materials Testing
Carl Hanser Verlag, Munich., 55(2), 109-113.
https://doi.org/10.3139/120.110417
https://hdl.handle.net/21.15107/rcub_gery_542

Ebersold Z, Mitrović N, Đukić S, Peulić A, Obradović D. Low Frequencies for Cardboard Quality Assurance. in Materials Testing. 2013;55(2):109-113.
doi:10.3139/120.110417
https://hdl.handle.net/21.15107/rcub_gery_542 .

Ebersold, Zoran, Mitrović, Nebojša, Đukić, Slobodan, Peulić, Aleksandar, Obradović, Dragiša, "Low Frequencies for Cardboard Quality Assurance" in Materials Testing, 55, no. 2 (2013):109-113,
https://doi.org/10.3139/120.110417 .,
https://hdl.handle.net/21.15107/rcub_gery_542 .

TY  - JOUR
AU  - Ebersold, Zoran
AU  - Mitrović, Nebojša
AU  - Đukić, Slobodan
AU  - Jordović, Branka
AU  - Peulić, Aleksandar
PY  - 2012
UR  - https://gery.gef.bg.ac.rs/handle/123456789/489
AB  - This paper focuses on the improvement of ultrasonic defectoscopy used for machine elements produced by direct laser metal sintering. The direct laser metal sintering process introduces the mixed metal powder and performs its subsequent laser consolidation in a single production step. Mechanical elements manufactured by laser sintering often contain many hollow cells due to weight reduction. The popular pulse echo defectoscopy method employing very high frequencies of several GHz is not successful on these samples. The aim of this paper is to present quadraphonic transmission ultrasound defectoscopy which uses low range frequencies of few tens of kHz. Therefore, the advantage of this method is that it enables defectoscopy for honeycombed materials manufactured by direct laser sintering. This paper presents the results of testing performed on AlSi12 sample.
PB  - Međunarodni Institut za nauku o sinterovanju, Beograd
T2  - Science of Sintering
T1  - Defectoscopy of Direct Laser Sintered Metals by Low Transmission Ultrasonic Frequencies
VL  - 44
IS  - 2
SP  - 177
EP  - 185
DO  - 10.2298/SOS1202177E
UR  - https://hdl.handle.net/21.15107/rcub_gery_489
ER  - 

@article{
author = "Ebersold, Zoran and Mitrović, Nebojša and Đukić, Slobodan and Jordović, Branka and Peulić, Aleksandar",
year = "2012",
abstract = "This paper focuses on the improvement of ultrasonic defectoscopy used for machine elements produced by direct laser metal sintering. The direct laser metal sintering process introduces the mixed metal powder and performs its subsequent laser consolidation in a single production step. Mechanical elements manufactured by laser sintering often contain many hollow cells due to weight reduction. The popular pulse echo defectoscopy method employing very high frequencies of several GHz is not successful on these samples. The aim of this paper is to present quadraphonic transmission ultrasound defectoscopy which uses low range frequencies of few tens of kHz. Therefore, the advantage of this method is that it enables defectoscopy for honeycombed materials manufactured by direct laser sintering. This paper presents the results of testing performed on AlSi12 sample.",
publisher = "Međunarodni Institut za nauku o sinterovanju, Beograd",
journal = "Science of Sintering",
title = "Defectoscopy of Direct Laser Sintered Metals by Low Transmission Ultrasonic Frequencies",
volume = "44",
number = "2",
pages = "177-185",
doi = "10.2298/SOS1202177E",
url = "https://hdl.handle.net/21.15107/rcub_gery_489"
}

Ebersold, Z., Mitrović, N., Đukić, S., Jordović, B.,& Peulić, A.. (2012). Defectoscopy of Direct Laser Sintered Metals by Low Transmission Ultrasonic Frequencies. in Science of Sintering
Međunarodni Institut za nauku o sinterovanju, Beograd., 44(2), 177-185.
https://doi.org/10.2298/SOS1202177E
https://hdl.handle.net/21.15107/rcub_gery_489

Ebersold Z, Mitrović N, Đukić S, Jordović B, Peulić A. Defectoscopy of Direct Laser Sintered Metals by Low Transmission Ultrasonic Frequencies. in Science of Sintering. 2012;44(2):177-185.
doi:10.2298/SOS1202177E
https://hdl.handle.net/21.15107/rcub_gery_489 .

Ebersold, Zoran, Mitrović, Nebojša, Đukić, Slobodan, Jordović, Branka, Peulić, Aleksandar, "Defectoscopy of Direct Laser Sintered Metals by Low Transmission Ultrasonic Frequencies" in Science of Sintering, 44, no. 2 (2012):177-185,
https://doi.org/10.2298/SOS1202177E .,
https://hdl.handle.net/21.15107/rcub_gery_489 .