Faculty Profiles - OKADA Akira

Papers - OKADA Akira

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Fundamental Study on Side Surface Smoothing of Hole by Large-area EB Irradiation Method Reviewed International journal

Jiayu LU, Togo SHINONAGA, Motohiro INOUE, Akira OKADA

Proceedings of the 10th International Conference on Leading Edge Manufacturing in 21st Century D16 2021.11

Fundamental Study on Factors of Mold Releasability from Milling Surface in Compression Molding of Thermosetting Phenol Resin Reviewed International journal

Ryoji KITADA, Qin WANG, Kazuhiro KAWAGUCHI, Shun-ichiro TSUETANI, Akira OKADA

Proceedings of the 10th International Conference on Leading Edge Manufacturing in 21st Century C08 2021.11

Investigation on reduction of dross height by analyzing beam intensity distribution in fiber laser cutting Reviewed International journal

Naoto Kai, Yasuhiro Okamoto, Akira Okada, Hiroaki Ishiguro, Ryohei Ito, Akihiko Sugiyama, Hiroshi Okawa, Rio Fujita

Journal of Laser Applications 33 ( 4 ) 042008 - 042008 2021.11

Fundamental Study on Laser Forming Characteristics of Carbon Fiber Reinforced Thermoplastic Sheet Reviewed International journal

Ryoji KITADA, Rina WATANABE, Takashi KAWAZOE, Yasuhiro OKAMOTO, Akira OKADA

Proceedings of the 10th International Conference on Leading Edge Manufacturing in 21st Century D26 2021.11

Fundamental Study on Surface Texturing of Alloy Steel by Ultrashort Pulsed Laser for Control of Water Repellency Reviewed International journal

Kentaro MURATA, Togo SHINONAGA, Yasuhiro OKAMOTO, Akira OKADA

Proceedings of the 10th International Conference on Leading Edge Manufacturing in 21st Century D25 2021.11

Fundamental Investigation of Working fluid Flow Formed by High-speed Wire Running in Multi-wire EDM Slicing Reviewed International journal

Shusei TABUCHI, Yasuhiro OKAMOTO, Akira OKADA, Haruya KURIHARA

Proceedings of the 10th International Conference on Leading Edge Manufacturing in 21st Century G08 2021.11

Direct Observation of Spark Locations in Fine Wire EDM Using High-speed Camera Reviewed International journal

Yu MIYAZAKI, Shixian LIU, Akira OKADA

Proceedings of the 10th International Conference on Leading Edge Manufacturing in 21st Century G07 2021.11

Possibility of Compositionally Graded Surface Formation by Electrical Discharge Machining Reviewed International journal

Shun-ichiro TSUETANI, Yuki IKEUCHI, Akira OKADA, Ryoji KITADA

Proceedings of the 10th International Conference on Leading Edge Manufacturing in 21st Century G06 2021.11

Influence of Working Oil Viscosity on Wire EDM Characteristics Reviewed International journal

Shixian LIU, Hiroki IWAI, Akira OKADA

Proceedings of the 10th International Conference on Leading Edge Manufacturing in 21st Century G03 2021.11

Fundamental Study on Calcination Method of Limestone by Using CW Laser of Near-infrared Reviewed International journal

Takafumi MIYAJIMA, Yasuhiro OKAMOTO, Shuji FUJIKI, Masakazu OKA, Shunjirou SHIZUKA, Akira OKADA

Proceedings of the 10th International Conference on Leading Edge Manufacturing in 21st Century D24 2021.11

Fundamental Study on Laser Micro-welding of Glass by Using Spatial Light Modulator Reviewed International journal

Kazuki IHORIYA, Yasuhiro OKAMOTO, Akira OKADA

Proceedings of the 10th International Conference on Leading Edge Manufacturing in 21st Century D22 2021.11

Surface Smoothing and Surface Modification of Maraging Steel by Large-area EB Irradiation Reviewed International journal

Shun WATANABE, Togo SHINONAGA, Atsushi YAMAGUCHI, Akira OKADA

Proceedings of the 10th International Conference on Leading Edge Manufacturing in 21st Century D17 2021.11

Formation and Its Mechanism of High-speed Micro-grooving on Metal Surface by Angled CW Laser Irradiation Reviewed International journal

Nozomi Taura, Akiya Mitsunobu, Tatsuhiko Sakai, Yasuhiro Okamoto, Akira Okada

Journal of Laser Micro/Nanoengineering 16 ( 2 ) 2021.10

Influence of Free-electron Density Distribution on Mechanical Strength in Micro-welding of Glass by Picosecond Pulsed Laser Reviewed International journal

Zhiyong Ouyang, Yasuhiro Okamoto, Kazuki Ihoriya, Akira Okada

Journal of Smart Processing 10 ( 5 ) 294 - 300 2021.9

Cutting performance evaluation of boron-doped and undoped diamond coatings in drilling of CFRP laminates Reviewed International journal

Alexander Soldatov, Akira Okada, Hitoshi Ogawa

Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture 095440542110406 - 095440542110406 2021.8

Authorship：Corresponding author Language：English Publishing type：Research paper (scientific journal) Publisher：SAGE Publications

This study investigated the effect of boron-doped and undoped diamond coatings on the cutting performance of cobalt cemented tungsten carbide (WC-Co) drills when drilling CFRP. Three types of diamond coating, as boron-doped microcrystalline (B-MCD), boron-doped nanocrystalline (B-NCD), and undoped nanocrystalline (NCD), were deposited on specially designed for drilling of CFRP one-shot drills by the hot filament chemical vapor deposition (HFCVD) method. The coating characteristics, such as surface morphology, roughness, carbon structure, and interfacial adhesion, were investigated. Then cutting tests were carried out, and the tool’s flank wear, thrust force, and torque were evaluated. For comparison of cutting performance, non-coated WC-Co drills were used in the tests as well. Furthermore, drilled holes were inspected in terms of peel-up and push-out delamination. According to the results, the B-MCD coated drill presented advantages in tool life, and quality of drilled holes over the NCD and B-NCD coated drills. Also, the results confirmed the adhesion enhanced effect of diamond coating to WC-Co substrate through boron doping of the layer.

DOI： 10.1177/09544054211040624

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Other Link： http://journals.sagepub.com/doi/full-xml/10.1177/09544054211040624

Formation of Smooth and Flat Area for Monocrystalline Diamond by ns Pulsed Laser Reviewed International journal

Yasuhiro Okamoto, Tsubasa Okubo, Atsuya Kajitani, Akira Okada

Proceedings of Laser in Manufacturing 2021 21 - 24 2021.6

Reliable and strong micro-welding of glass by ultrashort pulsed laser Reviewed

Yasuhiro Okamoto, Zhiyong Ouyang, Akira Okada

Frontiers in Ultrafast Optics: Biomedical, Scientific, and Industrial Applications XXI 11676 116760P-1 - 116760P-7 2021.3

Development of Cu-Zr Wire Electrode for High-performance Fine Wire EDM Reviewed International journal

Shizian Liu, Masato Miyoshi, Akira Okada, Naokuni Muramatsu, Kazuhiko Nomura

International Journal of Electrical Machining ( 26 ) 40 - 45 2021.3

Surface Profile Variation of Periodic Surface Nanostructures Produced by Ultrashort Pulsed Laser for Enhancement of Cell Orientation Reviewed International journal

Togo Shinonaga, Shouno Kinoshita, Yasuhiro Okamoto, Akira Okada

International Journal of Electrical Machining 26 ( 26 ) 54 - 59 2021.3

Clarification of Temperature Distribution for Metals with Different Thermal Conductivity in Large-area Electron Beam Irradiation Reviewed International journal

Shoya Ota, Tsubasa Sakai, Togo Shinonaga, Yasuhiro Okamoto, Akira Okada

Procedia CIRP 95 960 - 965 2021.1

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