• 781 Citations
  • 16 h-Index
1993 …2019
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Research Output 1993 2019

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Article
2019

High surface quality micro machining of monocrystalline diamond by picosecond pulsed laser

Okamoto, Y., Okada, A., Kajitani, A. & Shinonaga, T., Jan 1 2019, In : CIRP Annals.

Research output: Contribution to journalArticle

Pulsed lasers
Surface properties
Diamonds
Machining
Surface roughness

Influence of numerical aperture on molten area formation in fusion micro-welding of glass by picosecond pulsed laser

Ouyang, Z., Okamoto, Y., Ogino, Y., Sakagawa, T. & Okada, A., Apr 1 2019, In : Applied Sciences (Switzerland). 9, 7, 1412.

Research output: Contribution to journalArticle

Open Access
numerical aperture
Pulsed lasers
welding
Molten materials
pulsed lasers
2018
Conductive films
Pulsed lasers
Nanowires
Silver
Polarization
2 Citations (Scopus)

High surface quality welding of aluminum using adjustable ring-mode fiber laser

Maina, M. R., Okamoto, Y., Okada, A., Närhi, M., Kangastupa, J. & Vihinen, J., Aug 1 2018, In : Journal of Materials Processing Technology. 258, p. 180-188 9 p.

Research output: Contribution to journalArticle

Fiber lasers
Laser modes
Aluminum
Surface properties
Welding

Influence of surface state in micro-welding of copper by Nd:YAG laser

Maina, M. R., Okamoto, Y., Inoue, R., Nakashiba, S. I., Okada, A. & Sakagawa, T., Nov 23 2018, In : Applied Sciences (Switzerland). 8, 12, 2364.

Research output: Contribution to journalArticle

Surface states
welding
YAG lasers
Copper
Welding

Magnetic fixtures for enhancement of smoothing effect by electron beam melting

Shinonaga, T., Okada, A., Liu, H. & Kimura, M., Apr 1 2018, In : Journal of Materials Processing Technology. 254, p. 229-237 9 p.

Research output: Contribution to journalArticle

Electron beam melting
Electron beams
Irradiation
Deburring
Evaporation
2017
1 Citation (Scopus)
Conductive films
Pulsed Laser
Nanowires
Silver
Pulsed lasers

Fundamental study on addition of osteoconductivity to titanium alloy surface by EDM

Shinonaga, T., Iida, Y., Toshimitsu, R. & Okada, A., Nov 1 2017, In : International Journal of Automation Technology. 11, 6, p. 869-877 9 p., ijate001100060869.

Research output: Contribution to journalArticle

Electric discharge machining
Titanium alloys
Bone
Machining
Titanium
4 Citations (Scopus)

Improvement of curved hole EDM drilling performance using suspended ball electrode by workpiece vibration

Okada, A., Yamaguchi, A. & Ota, K., 2017, In : CIRP Annals - Manufacturing Technology. 66, 1, p. 189-192 4 p.

Research output: Contribution to journalArticle

Vibrations (mechanical)
Drilling
Electrodes
Zinc alloys
Metal foil
Open Access
Electric discharge machining
Wire
Semiconductor materials
2016
1 Citation (Scopus)

Characteristics of spatter in micro-drilling of metal sheet by pulsed Nd: YAG laser

Okamoto, Y., Yamamoto, H. & Okada, A., Nov 1 2016, In : International Journal of Automation Technology. 10, 6, p. 874-881 8 p.

Research output: Contribution to journalArticle

Sheet metal
Flow of gases
Drilling
Lasers
High speed cameras
3 Citations (Scopus)

Effect of focusing condition on molten area characteristics in micro-welding of borosilicate glass by picosecond pulsed laser

Nordin, I. H. W., Okamoto, Y., Okada, A., Takekuni, T. & Sakagawa, T., May 1 2016, In : Applied Physics A: Materials Science and Processing. 122, 5, 492.

Research output: Contribution to journalArticle

Borosilicate glass
Aberrations
Pulsed lasers
Molten materials
Welding
2 Citations (Scopus)

Effect of wavelength and pulse duration on laser micro-welding of monocrystalline silicon and glass

Nordin, I. H. W., Okamoto, Y., Okada, A., Jiang, H. & Sakagawa, T., Apr 1 2016, In : Applied Physics A: Materials Science and Processing. 122, 4, 400.

Research output: Contribution to journalArticle

Monocrystalline silicon
Laser pulses
Pulsed lasers
Welding
Glass
2 Citations (Scopus)

Evaluation of molten area in micro-welding of monocrystalline silicon and glass

Nordin, I. H. W., Okamoto, Y., Miyamoto, I. & Okada, A., Mar 3 2016, In : Unknown Journal. 114, 1, 012039.

Research output: Contribution to journalArticle

Monocrystalline silicon
Molten materials
Welding
Glass
Pulsed lasers
7 Citations (Scopus)

Influence of electrical discharge machining parameters on cutting parameters of carbon fiber-reinforced plastic

Habib, S. & Okada, A., Jan 2 2016, In : Machining Science and Technology. 20, 1, p. 99-114 16 p.

Research output: Contribution to journalArticle

Electric discharge machining
Carbon fiber reinforced plastics
Composite materials
Machining
Steel
16 Citations (Scopus)

Study on the movement of wire electrode during fine wire electrical discharge machining process

Habib, S. & Okada, A., Jan 1 2016, In : Journal of Materials Processing Technology. 227, p. 147-152 6 p.

Research output: Contribution to journalArticle

Electric discharge machining
Machining
Electrode
Wire
Electrodes
Welding
Stainless steel
Lasers
Scanning
Continuous wave lasers
2015

Effect of laser beam intensity distribution in removal processing of ZnO film by nano-second pulsed laser with square section fiber

Nishi, N., Okamoto, Y., Yokoyama, T., Okada, A., Nakashiba, S. I. & Sakagawa, T., Nov 1 2015, In : Seimitsu Kogaku Kaishi/Journal of the Japan Society for Precision Engineering. 81, 11, p. 1033-1038 6 p.

Research output: Contribution to journalArticle

Zinc oxide
Pulsed lasers
Oxide films
Laser beams
Lenses
3 Citations (Scopus)

Effect of surrounding gas condition on surface integrity in micro-drilling of SiC by ns pulsed laser

Okamoto, Y., Asako, K., Nishi, N., Sakagawa, T. & Okada, A., Mar 5 2015, (Accepted/In press) In : Applied Physics B: Lasers and Optics.

Research output: Contribution to journalArticle

drilling
integrity
pulsed lasers
gases
silicon carbides
10 Citations (Scopus)
Electric discharge machining
Wire
Conductive materials
High speed cameras
Video cameras

Laser Micro-drilling of Multi-layered Artificial Skin

Okamoto, Y., Asako, K., Okada, A., Minagi, S., Wada, N., Pan, Q., Jin, K. & Nishigawa, G., 2015, In : Proceedings of Lasers in Manufacturing Laser in Manufactring 2015.

Research output: Contribution to journalArticle

Study on deburring and shape control of stainless steel knife edge by ion beam machining

Tamaoki, T., Okada, A., Uemura, K., Uno, Y. & Takagl, T., May 1 2015, In : Seimitsu Kogaku Kaishi/Journal of the Japan Society for Precision Engineering. 81, 5, p. 446-451 6 p.

Research output: Contribution to journalArticle

Deburring
Ion beams
Machining
Stainless steel
Leather
9 Citations (Scopus)

Wire breakage and deflection caused by nozzle jet flushing in wire EDM

Okada, A., Konishi, T., Okamoto, Y. & Kurihara, H., 2015, In : CIRP Annals - Manufacturing Technology. 64, 1, p. 233-236 4 p.

Research output: Contribution to journalArticle

Nozzles
Wire
Debris
Stress concentration
Flow fields
1 Citation (Scopus)
Fiber lasers
high aspect ratio
Pulsed lasers
Sapphire
fiber lasers
8 Citations (Scopus)

Fundamental study on releasability of molded rubber from mold tool surface

Okada, A., Okamoto, Y., Clare, A. & Uno, Y., Feb 2014, In : International Journal of Advanced Manufacturing Technology. 70, 5-8, p. 1515-1521 7 p.

Research output: Contribution to journalArticle

Rubber
Metals
Polishing
Surface treatment
Chromium
18 Citations (Scopus)

Improvement of surface characteristics for long life of metal molds by large-area EB irradiation

Okada, A., Okamoto, Y., Uno, Y. & Uemura, K., Aug 2014, In : Journal of Materials Processing Technology. 214, 8, p. 7040-7048 9 p.

Research output: Contribution to journalArticle

Molds
Irradiation
Metals
Polishing
Surface structure

Study on Possibility of Micro-deburring by Large-area Electron Beam Irradiation

Yonehara, H., Okada, A. & Okamoto, Y., 2014, In : International Journal of Electrical Machining. 19, p. 22-27 6 p.

Research output: Contribution to journalArticle

2 Citations (Scopus)
Semiconductor lasers
Aluminum alloys
Welding
Lasers
Boundary conditions

連続発振半導体レーザ重畳パルスNd:YAGレーザを用いたアルミ合金の微細溶接におけるキーホール発現境界

Nakashiba, S., Okamoto, Y., Sakagawa, T., Harada, M. & Okada, A., 2014, In : 精密工学会誌. 80, 4, p. 419-424 6 p.

Research output: Contribution to journalArticle

2013
16 Citations (Scopus)
Electric discharge machining
Carbon fiber reinforced plastics
Machining
Carbon fibers
Fibers
Nitriding
Stainless steel
Plasmas
Durability
Plasma density
18 Citations (Scopus)

Evaluation of molten zone in micro-welding of glass by picosecond pulsed laser

Okamoto, Y., Miyamoto, I., Cvecek, K., Okada, A., Takahashi, K. & Schmidt, M., Jan 2013, In : Journal of Laser Micro Nanoengineering. 8, 1, p. 65-69 5 p.

Research output: Contribution to journalArticle

Pulsed lasers
welding
fusion welding
Molten materials
pulsed lasers
3 Citations (Scopus)

Improving the productivity of electrical discharge machining process by using multi-thin electrodes

Sameh, H., Okada, A. & Uno, Y., Jan 1 2013, In : Machining Science and Technology. 17, 1, p. 110-128 19 p.

Research output: Contribution to journalArticle

Electric discharge machining
Productivity
Electrodes
Machining
Wear of materials
1 Citation (Scopus)

Micro-welding of high thermal conductive material aluminum-graphite composite by pulsed Nd: Yag laser

Ismail, M. I. S., Okamoto, Y., Okada, A., Uno, Y. & Mukhtar, M., Jan 2013, In : Journal of Laser Micro Nanoengineering. 8, 1, p. 90-96 7 p.

Research output: Contribution to journalArticle

aluminum graphite composites
Aluminum graphite composites
Conductive materials
metal matrix composites
welding
11 Citations (Scopus)

Neural network modeling for prediction of weld bead geometry in laser microwelding

Ismail, M. I. S., Okamoto, Y. & Okada, A., 2013, In : Advances in Optical Technologies. 415837.

Research output: Contribution to journalArticle

beads
Welds
Neural networks
Geometry
Lasers