Search Results - "Kazutaka OKAMOTO"

Experimental and numerical study on formability of friction stir welded TWB sheets based on hemispherical dome stretch tests by Lee, Wonoh, Chung, Kyung-Hwan, Kim, Daeyong, Kim, Junehyung, Kim, Chongmin, Okamoto, Kazutaka, Wagoner, R.H., Chung, Kwansoo

“…In order to investigate formability performance and also to obtain guidelines for the stamping process design of friction stir welded TWB (tailor welded blank)…”
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Numerical simulation of friction stir butt welding process for AA5083-H18 sheets by Kim, Dongun, Badarinarayan, Harsha, Kim, Ji Hoon, Kim, Chongmin, Okamoto, Kazutaka, Wagoner, R.H., Chung, Kwansoo

“…Thermo-mechanical simulation of the friction stir butt welding (FSBW) process was performed for AA5083-H18 sheets, utilizing a commercial finite volume method…”
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Rapid formation of the sigma phase in 304 stainless steel during friction stir welding by Park, Seung Hwan C., Sato, Yutaka S., Kokawa, Hiroyuki, Okamoto, Kazutaka, Hirano, Satoshi, Inagaki, Masahisa

“…Rapid formation of sigma phase occurred in 304 stainless steel during friction stir welding. A possibility was suggested that the sigma formation can be…”
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Boride Formation Induced by pcBN Tool Wear in Friction-Stir-Welded Stainless Steels by Park, Seung Hwan C., Sato, Yutaka S., Kokawa, Hiroyuki, Okamoto, Kazutaka, Hirano, Satoshi, Inagaki, Masahisa

“…The wear of polycrystalline cubic boron nitride (pcBN) tool and its effect on second phase formation were investigated in stainless steel friction-stir (FS)…”
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Corrosion resistance of friction stir welded 304 stainless steel by Park, Seung Hwan C., Sato, Yutaka S., Kokawa, Hiroyuki, Okamoto, Kazutaka, Hirano, Satoshi, Inagaki, Masahisa

“…Corrosion properties were evaluated in a friction stir welded 304 stainless steel. The degree of the sensitization was small in the heat affected zone, but the…”
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Numerical simulation of friction stir spot welding process for aluminum alloys by Kim, Dongun, Badarinarayan, Harsha, Ryu, Ill, Kim, Ji Hoon, Kim, Chongmin, Okamoto, Kazutaka, Wagoner, R. H., Chung, Kwansoo

“…Thermo-mechanical simulations of the Friction Stir Spot Welding (FSSW) processes were performed for AA5083-H18 and AA6022-T4, utilizing commercial Finite…”
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Springback evaluation of friction stir welded TWB automotive sheets by Kim, Junehyung, Lee, Wonoh, Chung, Kyung-Hwan, Kim, Daeyong, Kim, Chongmin, Okamoto, Kazutaka, Wagoner, R. H., Chung, Kwansoo

“…Springback behavior of automotive friction stir welded TWB (tailor welded blank) sheets was experimentally investigated and the springback prediction…”
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Activin A and Equine Chorionic Gonadotropin Recover Reproductive Dysfunction Induced by Neonatal Exposure to an Estrogenic Endocrine Disruptor in Adult Male Mice by Warita, Katsuhiko, Okamoto, Kazutaka, Mutoh, Ken-ichiro, Hasegawa, Yoshihisa, Yue, Zhan-Peng, Yokoyama, Toshifumi, Matsumoto, Yoshiki, Miki, Takanori, Takeuchi, Yoshiki, Kitagawa, Hiroshi, Sugawara, Teruo, Hoshi, Nobuhiko

“…We aimed to elucidate the mechanism of action of estrogenic endocrine disruptors and the rescue of reproductive function, particularly the responsiveness of…”
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Activin A and Equine Chorionic Gonadotropin Recover Reproductive Dysfunction Induced by Neonatal Exposure to an Estrogenic Endocrine Disruptor in Adult Male Mice1 by Warita, Katsuhiko, Okamoto, Kazutaka, Mutoh, Ken-ichiro, Hasegawa, Yoshihisa, Yue, Zhan-Peng, Yokoyama, Toshifumi, Matsumoto, Yoshiki, Miki, Takanori, Takeuchi, Yoshiki, Kitagawa, Hiroshi, Sugawara, Teruo, Hoshi, Nobuhiko

“…We aimed to elucidate the mechanism of action of estrogenic endocrine disruptors and the rescue of reproductive function, particularly the responsiveness of…”
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Analysis of Temperature and Plastic Flow during Friction Stir Spot Welding Using Particle Method by Shigeki HIRASAWA, Harsha BADARINARAYAN, Kazutaka OKAMOTO, Toshio TOMIMURA, Tsuyoshi KAWANAMI, Shigeki HIRANO

“…Friction stir spot welding (FSSW) is a new metal-joining process, and a numerical simulation code to calculate optimal welding conditions is desired. In this…”
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Analysis of effect of tool geometry on plastic flow during friction stir spot welding using particle method by Hirasawa, Shigeki, Badarinarayan, Harsha, Okamoto, Kazutaka, Tomimura, Toshio, Kawanami, Tsuyoshi

“…The effect of tool geometry on the plastic flow and material mixing during friction stir spot welding (FSSW) is investigated using the particle method…”
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Conduction-Cooled MgB2 Coil in Maximum Self-Magnetic Flux Density 2.3 Tesla Made With 300-Meter-Long Multifilamentary MgB2 Wire by Tanaka, Hideki, Kodama, Motomune, Ichiki, Yota, Kusunoki, Toshiaki, Kotaki, Hiroshi, Suzuki, Takaaki, Nishi, Kazuya, Okamoto, Kazutaka

“…We fabricated a 300-m-long multifilamentary MgB 2 wire as a powder in tube wire by using an in situ method. The J e values were approximately 250 A/mm 2 from 2…”
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Tensile and Bending Stress Tolerance on Round MgB2 Wire Made By In Situ PIT Process by Tanaka, Hideki, Suzuki, Takayuki, Kodama, Motomune, Ichiki, Yota, Haba, Toshio, Okamoto, Kazutaka

“…We measured the critical tensile strains at room temperature and the critical bending strains of in situ round MgB2 wires, and both critical strain values…”
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Reproductive Ability of Hybrids between Japanese Pond Turtle ( Mauremys japonica ) and Reeves' Pond Turtle ( Mauremys reevesii ) by Ueno, Shintaro, Kamezaki, Naoki, Mine, Kanako, Suzuki, Dai, Hosoya, Sho, Kikuchi, Kiyoshi, Okamoto, Kei, Torii, Masao, Kadowaki, Kazutaka, Okamoto, Ken, Sano, Mitsuhiko

“…Hybridization induced by human activities, such as crossbreeding between invasive and native species, can adversely affect the natural biodiversity of an…”
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Conduction Cooled MgB2 Coil in Maximum Self Magnetic Flux Desity 2.3 Tesla Made with 300-Meter-long Multifilamentary MgB2 Wire by Tanaka, Hideki, Kodama, Motomune, Ichiki, Yota, Kusunoki, Toshiaki, Kotaki, Hiroshi, Suzuki, Takaaki, Nishi, Kazuya, Okamoto, Kazutaka

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Macro-performance evaluation of friction stir welded automotive tailor-welded blank sheets: Part I – Material properties by Chung, Kwansoo, Lee, Wonoh, Kim, Daeyong, Kim, Junehyung, Chung, Kyung-Hwan, Kim, Chongmin, Okamoto, Kazutaka, Wagoner, R.H.

“…In order to evaluate the macroscopic performance of friction stir welded automotive tailor-welded blank (TWB) sheets, the hardening behavior, anisotropic…”
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Macro-performance evaluation of friction stir welded automotive tailor-welded blank sheets: Part II – Formability by Kim, Daeyong, Lee, Wonoh, Kim, Junehyung, Chung, Kyung-Hwan, Kim, Chongmin, Okamoto, Kazutaka, Wagoner, R.H., Chung, Kwansoo

“…Formability of automotive friction stir welded TWB (tailor-welded blank) sheets was experimentally and numerically investigated in this work for four…”
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Numerical simulation of friction stir welding process by Kim, Dongun, Badarinarayan, Harsha, Ryu, Ill, Hoon Kim, Ji, Kim, Chongmin, Okamoto, Kazutaka, Wagoner, R. H., Chung, Kwansoo

“…Thermo-mechanical simulations of the friction stir butt welding and friction stir spot welding processes were performed for AA5083-H18 sheets, utilizing…”
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