Tehnički vjesnik, Vol. 20 No. 2, 2013.
Prethodno priopćenje
Laser shock peening of N-155 superalloy after longtime service
Andjelka Milosavljevic
; University of Belgrade, Faculty of Mechanical Engineering, Kraljice Marije 16, 11020 Belgrade, Serbia
Sanja Petronic
; University of Belgrade, Faculty of Mechanical Engineering, Innovation Centre, Kraljice Marije 16, 11020 Belgrade, Serbia
Aleksander Kovacevic
; University of Belgrade, Institute of Physics, Pregrevica 118, 11080 Belgrade, Serbia
Zorica Kovacevic
; Institute for testing materials, Bulevar Vojvode Misica 43, 11000 Belgrade, Serbia
Zoran Stamenic
; University of Belgrade, Faculty of Mechanical Engineering, Kraljice Marije 16, 11020 Belgrade, Serbia
Sažetak
Iron base superalloy N-155 samples have been cut from the turbine blade which had been exposed to elevated pressure and temperature during its long-time service. The samples have been irradiated with pulsed laser beam, observed with scanning electron microscopy (SEM) and analysed by energo-dispersive spectrometry (EDS). The range of implemented beam parameters for which two types of treatments – mechanical and thermo-mechanical – occurred, has been determined. Vickers micro hardness tests have shown the increase in micro hardness after laser treatment.
Ključne riječi
EDS; laser; mechanical treatment; microstructure; SEM; superalloy
Hrčak ID:
100254
URI
Datum izdavanja:
15.4.2013.
Posjeta: 2.590 *