Y
Yasuhiro Okamoto
Researcher at Okayama University
Publications - 141
Citations - 1207
Yasuhiro Okamoto is an academic researcher from Okayama University. The author has contributed to research in topics: Laser & Welding. The author has an hindex of 17, co-authored 135 publications receiving 983 citations. Previous affiliations of Yasuhiro Okamoto include Sumitomo Electric Industries.
Papers
More filters
Patent
Laser processing method
Motoki Kakui,Hiroshi Kohda,Yasuomi Kaneuchi,Shinobu Tamaoki,Nagano Shigehiro,Yoshiyuki Uno,Yasuhiro Okamoto,Kenta Takahashi +7 more
TL;DR: In this paper, a laser processing method for cutting a cut surface can be obtained by irradiating the material to be processed with a laser beam, such that at least a part of the focusing line is located on a surface of the material being processed.
Journal ArticleDOI
Internal modification of glass by ultrashort laser pulse and its application to microwelding
TL;DR: In this paper, a simulation model is developed to determine intensity distribution of absorbed laser energy, nonlinear absorptivity and temperature distribution at different pulse repetition rates and pulse energies in internal modification of bulk glass with fs- and ps-laser pulses from experimental modified structure.
Journal ArticleDOI
Improvement in Surface Characteristics by EDM with Chromium Powder Mixed Fluid
TL;DR: In this article, the formation of chromium containing layer on the EDMed surface was tried by using chromium powder mixed fluid, and the EDMED surface characteristics were experimentally evaluated.
Journal ArticleDOI
High surface quality welding of aluminum using adjustable ring-mode fiber laser
Martin Ruthandi Maina,Yasuhiro Okamoto,Akira Okada,Matti Närhi,Jarno Kangastupa,Jorma Vihinen +5 more
TL;DR: In this paper, a method to improve penetration and stabilize the welding phenomenon at a high welding speed has been described through experimental and numerical investigations using a high power laser beam consisting of a center and a ring part.
Journal ArticleDOI
Surface modification of cemented carbide by EB polishing
TL;DR: In this paper, the surface structure of the EB polished cemented carbide was observed by TEM and the hardness and the water repellency were tested, and the separation force of molded resin from the surface was measured for evaluating the releasability of the resin.