Preliminary communication

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

Abstract

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.

Keywords

EDS; laser; mechanical treatment; microstructure; SEM; superalloy

Hrčak ID:

100254

URI

https://hrcak.srce.hr/100254

Publication date:

15.4.2013.

Article data in other languages: croatian

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