Franc Zupanič (Author), Tonica Bončina (Author), Davor Pipić (Author), Višnja Henč-Bartolič (Author)

Abstract

A Cu-Sn-Zn-Pb alloy was irradiated by ultraviolet nitrogen laser pulses (N2 laser, wave length 337 nm, pulse duration 6 ns, frequency 1 Hz, power 0.5 MW and average power density 0.67 GW/m2). The surface topography and microstructure were mainly studied by scanning electron microscopy, and a focused ion beam. The non-homogenized spatial beam profile resulted in the activation of several ablative mechanisms, the main being phase explosion and hydrodynamic instability. They caused a crater to be formed, surrounded by a raised rim and wavelike structure in a halo. FIB cross-sectioning and imaging showed a shallow (few micrometers) molten and resolidified surface layer. Streaks were observed in the heat-affected zone beneath the molten layer, indicating partial recrystallization of initially cold-worked material.

Keywords

preiskava materialov;mikrostruktura;topografija;bakrove zlitine;laser;fokusirani ionski snopi;ultravijolični dušikov laser;SEM;laserska ablacija;materials investigation;microstructure;topography;copper alloys;focused ion beams;UV nitrogen laser pulses;Scanning Electron Microscopy;laser ablation;

Data

Language: English
Year of publishing:
Typology: 1.01 - Original Scientific Article
Organization: UM FS - Faculty of Mechanical Engineering
UDC: 620.18:[535.374:621.375.8]:669.35
COBISS: 11883798 Link will open in a new window
ISSN: 0925-8388
Views: 1605
Downloads: 124
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Other data

Secondary language: English
Secondary keywords: preiskava materialov;mikrostruktura;topografija;bakrove zlitine;laser;fokusirani ionski snopi;ultravijolični dušikov laser;SEM;laserska ablacija;
URN: URN:SI:UM:
Pages: str. 197-204
Volume: ǂVol. ǂ465
Issue: ǂiss. ǂ1/2
Chronology: oct. 2008
ID: 8718591