TY  - JOUR
AU  - Rajcić, Boris
AU  - Petronić, Sanja
AU  - Čolić, Katarina
AU  - Stević, Zoran
AU  - Petrović, Ana
AU  - Mišković, Žarko
AU  - Milovanović, Dubravka
PY  - 2021
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/3500
AB  - Reliable and resilient constructions are basic for ensuring the safety of various structures. The superalloys are used as constructive materials due to their superb mechanical properties and endurance. However, even these materials can have certain areas where the stress concentration is higher than expected, such as drilling holes, which are common in various structures that need additional enhancement. Surface laser modifications of the areas surrounding the holes drilled in Nimonic 263 sheets are done by pulsed picosecond and nanosecond Nd:YAG laser irradiations with pulse durations of 170 ps and  lt = 8 ns, respectively. Following the laser surface treatment, the effectiveness of the enhancement was analyzed by the microhardness test and the deformation test. The results show that the deformation and stress values are decreased by 25-40 percent, showing the improvement in the resilience to deformation. The Vickers microhardness test results indicate an improvement in the Nimonic 263 microhardness. The dimensions of the microcracks are higher for the untreated material in comparison to the laser-treated material.
PB  - MDPI, Basel
T2  - Metals
T1  - Laser Processing of Ni-Based Superalloy Surfaces Susceptible to Stress Concentration
IS  - 5
VL  - 11
DO  - 10.3390/met11050750
ER  - 

@article{
author = "Rajcić, Boris and Petronić, Sanja and Čolić, Katarina and Stević, Zoran and Petrović, Ana and Mišković, Žarko and Milovanović, Dubravka",
year = "2021",
abstract = "Reliable and resilient constructions are basic for ensuring the safety of various structures. The superalloys are used as constructive materials due to their superb mechanical properties and endurance. However, even these materials can have certain areas where the stress concentration is higher than expected, such as drilling holes, which are common in various structures that need additional enhancement. Surface laser modifications of the areas surrounding the holes drilled in Nimonic 263 sheets are done by pulsed picosecond and nanosecond Nd:YAG laser irradiations with pulse durations of 170 ps and  lt = 8 ns, respectively. Following the laser surface treatment, the effectiveness of the enhancement was analyzed by the microhardness test and the deformation test. The results show that the deformation and stress values are decreased by 25-40 percent, showing the improvement in the resilience to deformation. The Vickers microhardness test results indicate an improvement in the Nimonic 263 microhardness. The dimensions of the microcracks are higher for the untreated material in comparison to the laser-treated material.",
publisher = "MDPI, Basel",
journal = "Metals",
title = "Laser Processing of Ni-Based Superalloy Surfaces Susceptible to Stress Concentration",
number = "5",
volume = "11",
doi = "10.3390/met11050750"
}

Rajcić, B., Petronić, S., Čolić, K., Stević, Z., Petrović, A., Mišković, Ž.,& Milovanović, D.. (2021). Laser Processing of Ni-Based Superalloy Surfaces Susceptible to Stress Concentration. in Metals
MDPI, Basel., 11(5).
https://doi.org/10.3390/met11050750

Rajcić B, Petronić S, Čolić K, Stević Z, Petrović A, Mišković Ž, Milovanović D. Laser Processing of Ni-Based Superalloy Surfaces Susceptible to Stress Concentration. in Metals. 2021;11(5).
doi:10.3390/met11050750 .

Rajcić, Boris, Petronić, Sanja, Čolić, Katarina, Stević, Zoran, Petrović, Ana, Mišković, Žarko, Milovanović, Dubravka, "Laser Processing of Ni-Based Superalloy Surfaces Susceptible to Stress Concentration" in Metals, 11, no. 5 (2021),
https://doi.org/10.3390/met11050750 . .