Comparison of ablation rate on stainless steel using pulsed lasers in different burst modes

Publikation: Beitrag in FachzeitschriftForschungsartikelBeigetragenBegutachtung

Beitragende

Abstract

In this study, the ablation efficiency of single ultra-short laser pulses having different burst modes was evaluated on three types of stainless steel (AISI 420, AISI 304, and AISI 316Ti). The experiments are performed using an infrared ultra-short pulsed laser (1032 nm, 250 fs). The investigation focused on analyzing the morphology of the ablated craters to elucidate the influence of burst mode on surface quality. Additionally, the ablated volume is quantified to assess the achievable removal rate. The results indicate that the burst mode significantly affects both surface morphology of the ablated areas and the ablation volume. Moreover, the temporal pulse-to-pulse distance t p at GHz burst with t p = 450 ps and MHz burst with t p = 17 ns revealed a notable influence. By using MHz burst mode, the ablation volume for a single pulse was almost doubled compared to a pulse without burst, using the same pulse energy (from ∼ 100 µm 3 to ∼ 200 µm 3 depending on the steel alloy). Interestingly, by using GHz burst and bi burst the effective ablation volume drops significantly.

Details

OriginalspracheEnglisch
Aufsatznummer136397
Seitenumfang4
FachzeitschriftMaterials letters
Jahrgang365
Frühes Online-DatumApr. 2024
PublikationsstatusVeröffentlicht - 15 Juni 2024
Peer-Review-StatusJa

Externe IDs

Scopus 85189673161

Schlagworte

Schlagwörter

  • Burst mode, Laser processing, Surface microstructuring, Ultrashort pulsed laser