Conference Publication Details
Mandatory Fields
Mannion, P,Coyne, E,O'Connor, GM,Howard, H,Glynn, TJ,Armitage, JC,Lessard, RA,Lampropoulos, GA
Analysis of entrapped debris during femtosecond machining of metals
PHOTONICS NORTH: APPLICATIONS OF PHOTONIC TECHNOLOGY 7B, PTS 1 AND 2
2004
April
Published
1
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Optional Fields
femtosecond pulse laser ablation threshold material removal mechanisms laser generated debris particulate entrapment metals LASER-ABLATION PHASE EXPLOSION
632
641
The analysis of entrapped debris provides a useful complementary method of investigating the laser ablation mechanism in laser processing of polycrystalline metal samples, in this case stainless steel, using a femtosecond laser (Clark MXR, CPA2001). Morphological investigations of the laser processed areas, for a range of laser fluences and pulse number, were recorded using optical and scanning electron microscopies (SEM) and white light interferometry. Data obtained on ablation rates, ejected particle sizes, and crater morphologies show that ablation changes from a smooth to an explosive process at high fluences, as identified with changes in the material removal mechanisms. In this paper, additional insight is derived from the analysis of the debris generated for metal samples, which can be attributed to laser ablation mechanisms based on vaporization, spallation, phase explosion, and fragmentation.
10.1117/12.569284
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