Details
Originalsprache | Englisch |
---|---|
Aufsatznummer | 022004 |
Seitenumfang | 12 |
Fachzeitschrift | Journal of laser applications |
Jahrgang | 31 |
Ausgabenummer | 2 |
Frühes Online-Datum | 4 März 2019 |
Publikationsstatus | Veröffentlicht - Mai 2019 |
Abstract
Polycrystalline cubic boron nitride (PCBN) is widely used in industry as a cutting tool material for the machining of hardened steels, cast iron, or nickel-based super alloys. For the generation of geometrical features on such cutting tools, laser ablation is a novel and promising technology, which offers wear-free processing, high automation potential, and geometrical flexibility. In this study, the ablation mechanisms are experimentally investigated for a wide range of laser pulse durations (fs-ns regime), and the effects on ablation depth, ablation efficiency, and surface roughness are investigated. It is shown that melting and recrystallization of binder material when processing with nanosecond pulse duration leads to a reduction of the ablation efficiency and reduced surface quality. These defects can be avoided by using a shorter pulse duration (picosecond and femtosecond). The highest ablation efficiency is achieved for femtosecond laser ablation. Moreover, fs-laser processing shows beneficial behavior in the ablation of coarse-grained PCBN grades, where grain excavation due to binder removal is prevented and the resulting surface roughness is significantly decreased compared to ns-laser processing.
ASJC Scopus Sachgebiete
- Werkstoffwissenschaften (insg.)
- Elektronische, optische und magnetische Materialien
- Physik und Astronomie (insg.)
- Atom- und Molekularphysik sowie Optik
- Ingenieurwesen (insg.)
- Biomedizintechnik
- Physik und Astronomie (insg.)
- Instrumentierung
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in: Journal of laser applications, Jahrgang 31, Nr. 2, 022004, 05.2019.
Publikation: Beitrag in Fachzeitschrift › Artikel › Forschung › Peer-Review
}
TY - JOUR
T1 - On the pulsed laser ablation of polycrystalline cubic boron nitride
T2 - Influence of pulse duration and material properties on ablation characteristics
AU - Denkena, Berend
AU - Krödel-Worbes, Alexander
AU - Grove, Thilo
N1 - Funding information: The authors thank the German Research Foundation (DFG) for the financial support within Project No. “KO 4293/6-1.”
PY - 2019/5
Y1 - 2019/5
N2 - Polycrystalline cubic boron nitride (PCBN) is widely used in industry as a cutting tool material for the machining of hardened steels, cast iron, or nickel-based super alloys. For the generation of geometrical features on such cutting tools, laser ablation is a novel and promising technology, which offers wear-free processing, high automation potential, and geometrical flexibility. In this study, the ablation mechanisms are experimentally investigated for a wide range of laser pulse durations (fs-ns regime), and the effects on ablation depth, ablation efficiency, and surface roughness are investigated. It is shown that melting and recrystallization of binder material when processing with nanosecond pulse duration leads to a reduction of the ablation efficiency and reduced surface quality. These defects can be avoided by using a shorter pulse duration (picosecond and femtosecond). The highest ablation efficiency is achieved for femtosecond laser ablation. Moreover, fs-laser processing shows beneficial behavior in the ablation of coarse-grained PCBN grades, where grain excavation due to binder removal is prevented and the resulting surface roughness is significantly decreased compared to ns-laser processing.
AB - Polycrystalline cubic boron nitride (PCBN) is widely used in industry as a cutting tool material for the machining of hardened steels, cast iron, or nickel-based super alloys. For the generation of geometrical features on such cutting tools, laser ablation is a novel and promising technology, which offers wear-free processing, high automation potential, and geometrical flexibility. In this study, the ablation mechanisms are experimentally investigated for a wide range of laser pulse durations (fs-ns regime), and the effects on ablation depth, ablation efficiency, and surface roughness are investigated. It is shown that melting and recrystallization of binder material when processing with nanosecond pulse duration leads to a reduction of the ablation efficiency and reduced surface quality. These defects can be avoided by using a shorter pulse duration (picosecond and femtosecond). The highest ablation efficiency is achieved for femtosecond laser ablation. Moreover, fs-laser processing shows beneficial behavior in the ablation of coarse-grained PCBN grades, where grain excavation due to binder removal is prevented and the resulting surface roughness is significantly decreased compared to ns-laser processing.
KW - cutting tools
KW - PCBN
KW - pulsed laser ablation
KW - surface integrity
UR - http://www.scopus.com/inward/record.url?scp=85062603826&partnerID=8YFLogxK
U2 - 10.2351/1.5084724
DO - 10.2351/1.5084724
M3 - Article
AN - SCOPUS:85062603826
VL - 31
JO - Journal of laser applications
JF - Journal of laser applications
SN - 1042-346X
IS - 2
M1 - 022004
ER -