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Journal Articles

Feasibility study on application of synchrotron radiation CT imaging to alloy steel for non-destructive inspection of inclusions

Shimamura, Yoshinobu*; Matsushita, Shinya*; Fujii, Tomoyuki*; Togo, Keiichiro*; Akita, Koichi*; Shobu, Takahisa; Shiro, Ayumi*

Metals, 9(5), p.527_1 - 527_9, 2019/05

https://doi.org/10.3390/met9050527

Times Cited Count：4 Percentile：23.64(Materials Science, Multidisciplinary)

Oral presentation

In-situ TEM observation under tensile loading in bubble dispersion strengthen copper

Shi, S.*; Ono, Naoko*; Ukai, Shigeharu*; Hayashi, Shigenari*; Togo, Koichi*; Fukumoto, Kenichi*; Abe, Yosuke

no journal, ,

Bubble dispersion strengthened (BDS) copper was synthesized by using the dissociated gases of the poly methyl methacrylate (PMMA) during Spark Plasma Sintering (SPS). By in-situ TEM observation under tensile loading, we analyzed a detachment angle of the dislocation from the bubble, and evaluated the pinning force of bubble for the moving dislocations. TEM observation showed homogeneously dispersed bubbles in Cu-5volPMMA and average bubble size was about 10 nm in diameter. It was analyzed that dispersed bubbles can strengthen copper with an angle 79 $^{circ}$ at dislocation detached from bubbles, which was consistent with the interaction angle 74 $^{circ}$ estimated by Vickers hardness measurement of the same specimen.