Characterization of Inconel 625 surface layer modified by laser shock processing
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Magdalena Rozmus-Górnikowska
Abstract
In this study the microstructure of nickel alloy (Inconel 625) surface layer after laser shock processing (LSP) was investigated by means of light microscopy, scanning electron microscopy and transmission electron microscopy. The LSP treatment was performed using a Q switched Nd:YAG laser. Optical and SEM images of the Inconel 625 after LSP showed that on the surface as well as on the cross-sections of the treated samples slip bands were clearly visible. Moreover, TEM micrographs revealed that under the thin melting layer of the treated material a high density of dislocations was present. The changes in microstructure come down even to 100 μm below the surface. The new and the most important finding of this study is that, in addition to slip bands, numerous cracks of hard carbide precipitates in the area affected by the laser process were visible both on the treated surface and on the cross-section of the material.
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© 2019, Carl Hanser Verlag, München
Articles in the same Issue
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- Evolution of γ′ morphology and γ/γ′ lattice parameter misfit in a nickel-based superalloy during non-equilibrium cooling
- Effect of heat treatment on the precipitation hardening in FeNiCoAlTaB shape memory alloys
- The structure and formation mechanism of FeS2/Fe3S4/S8 nanocomposite synthesized using spherical shaped Fe3O4 nanoparticles as the precursor
- Short Communications
- Characterization of Inconel 625 surface layer modified by laser shock processing
- DGM News
- DGM News
Articles in the same Issue
- Contents
- Contents
- Editorial
- XVI International Conference on Electron Microscopy
- Original Contributions
- Application of analytical electron microscopy and FIB-SEM tomographic technique for phase analysis in as-cast Allvac 718Plus superalloy
- Microstructure and properties of laser interference crystallized amorphous FeSiB ribbon
- Analysis of amorphous regions in severely marformed NiTi shape memory alloy
- Structure of MgLiAl alloys after various routes of severe plastic deformation studied by TEM
- Microstructure and selected mechanical and electrical property analysis of Sr-doped LaCoO3 perovskite thin films deposited by the PLD technique
- Microstructure of an oxide scale formed on ATI 718Plus superalloy during oxidation at 850 °C characterised using analytical electron microscopy
- Effect of powder morphology on the microstructure and properties of cold sprayed Ni coatings
- Microstructure of Ti/Al multilayer foils ignited with electric current
- Evolution of γ′ morphology and γ/γ′ lattice parameter misfit in a nickel-based superalloy during non-equilibrium cooling
- Effect of heat treatment on the precipitation hardening in FeNiCoAlTaB shape memory alloys
- The structure and formation mechanism of FeS2/Fe3S4/S8 nanocomposite synthesized using spherical shaped Fe3O4 nanoparticles as the precursor
- Short Communications
- Characterization of Inconel 625 surface layer modified by laser shock processing
- DGM News
- DGM News
