TY - JOUR
T1 - Efficient drilling of amorphous alloy foils using low-energy long pulses of a Nd:YAG laser
AU - Tsuji, Takeshi
AU - Yamamoto, Shota
AU - Ikemoto, Shun
AU - Hara, Hiromasa
AU - Ohta, Motoki
AU - Nakamura, Daisuke
N1 - Funding Information:
The authors thank Dr. Nobuhiko Chiwata (Hitachi Metals Ltd.) for providing useful comments and information. We also thank Prof. Hidetoshi Miyazaki (Shimane University) for allowing us to use SEM. This work was supported by the project, “Subsidy for Regional University/Regional Industry Creation” of the Cabinet Office, Government of Japan: “Creation of a Global Base for Advanced Metals—Next Generation TATARA Project.”
Funding Information:
The authors thank Dr. Nobuhiko Chiwata (Hitachi Metals Ltd.) for providing useful comments and information. We also thank Prof. Hidetoshi Miyazaki (Shimane University) for allowing us to use SEM. This work was supported by the project, “Subsidy for Regional University/Regional Industry Creation” of the Cabinet Office, Government of Japan: “Creation of a Global Base for Advanced Metals—Next Generation TATARA Project.”
Publisher Copyright:
© 2022, The Author(s), under exclusive licence to Springer-Verlag London Ltd., part of Springer Nature.
PY - 2022/5
Y1 - 2022/5
N2 - Laser drilling of amorphous alloy foils was conducted using low-energy long pulses (LP) generated using a Nd:YAG laser. Results showed that LP can drill an amorphous alloy foil more efficiently than a nanosecond pulse (NSP) can: An LP at 1 mJ can open a through-hole on an amorphous alloy foil with 25 µm thickness although a single-shot NSP at 20 mJ formed a crater with ca. 3 µm depth. From these findings, we infer that the markedly higher drilling efficiency of a low-energy LP than that of NSP is attributable to 1) lower plasma generation by LP than by NSP, and 2) continuous heating of the target material by multiple sub-pulses in an LP. Results also demonstrate that low-energy LP drilling is applicable to various metal foils and that the drilling efficiency depends on the metal species. The results of the analysis of the relation between some physical properties of the metals and the drilling efficiency suggested that the drilling would proceed via melting of materials.
AB - Laser drilling of amorphous alloy foils was conducted using low-energy long pulses (LP) generated using a Nd:YAG laser. Results showed that LP can drill an amorphous alloy foil more efficiently than a nanosecond pulse (NSP) can: An LP at 1 mJ can open a through-hole on an amorphous alloy foil with 25 µm thickness although a single-shot NSP at 20 mJ formed a crater with ca. 3 µm depth. From these findings, we infer that the markedly higher drilling efficiency of a low-energy LP than that of NSP is attributable to 1) lower plasma generation by LP than by NSP, and 2) continuous heating of the target material by multiple sub-pulses in an LP. Results also demonstrate that low-energy LP drilling is applicable to various metal foils and that the drilling efficiency depends on the metal species. The results of the analysis of the relation between some physical properties of the metals and the drilling efficiency suggested that the drilling would proceed via melting of materials.
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U2 - 10.1007/s00170-022-09042-1
DO - 10.1007/s00170-022-09042-1
M3 - Article
AN - SCOPUS:85126211280
VL - 120
SP - 4139
EP - 4146
JO - International Journal of Advanced Manufacturing Technology
JF - International Journal of Advanced Manufacturing Technology
SN - 0268-3768
IS - 5-6
ER -