著者

増村 拓朗 谷口 大河 浦中 祥平 平嶋 一誠 土山 聡宏 丸山 直紀 白幡 浩幸 植森 龍治

出版者

一般社団法人 日本鉄鋼協会

雑誌

鉄と鋼 (ISSN:00211575)

巻号頁・発行日

vol.106, no.11, pp.835-843, 2020 (Released:2020-10-31)

参考文献数

22

被引用文献数

1 7

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Electrical resistivity of low-carbon martensitic steels was measured to estimate the carbon concentration in solid solution. Since electrical resistivity is influenced not only by solute carbon but also by substitutional elements, lattice defects and second phase, the effects of these factors need to be subtracted from total electrical resistivity, in order to obtain the accurate solute carbon concentration by this method. As a result, the effects of dislocations and grain boundaries were much smaller than that of solute elements, being only 1 - 2% of the measured electrical resistivity, in martensitic steel. On the other hand, substitutional elements and retained austenite were found to be significantly effective. By subtracting these effects from the measured value, the change in electrical resistivity due to solute carbon, Δρsol.C, could be formulated as a function of the carbon concentration in solid solution of martensite, Csol, as follows:Δρsol.C [mΩmm] = 0.25 × Csol [mass%]The estimated solute carbon concentration was confirmed to correspond to the directly measured value by atom probe tomography.

著者

植森 龍治 向井 俊夫 谷野 満

出版者

The Iron and Steel Institute of Japan

雑誌

鉄と鋼 (ISSN:00211575)

巻号頁・発行日

vol.77, no.11, pp.2060-2067, 1991-11-01 (Released:2009-06-19)

参考文献数

20

被引用文献数

1 1

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Partition of alloying elements between spinodally-decomposed phases in Fe-Cr-Co-Si alloys was examined by Atom-Probe Field-Ion Microscope (AP-FIM). The results showed that the ferromagnetic particle (α1) is rich in Fe and Co, and the weak-ferromagnetic matrix (α2) rich in Cr and Si. The enrichment of Si in the α2 phase was explained through thermodynamical considerations. Si is more strongly bonded to Cr than to Fe. The improvement of hard magnetic properties by Si additions was found and discussed in terms of the changes in saturation magnetization of the α1 and α2 phases. The increase in coercive force may be mainly attributed to the reduction of saturation magnetization of the α2 phase by the addition of Si.

著者

児島 明彦 植森 龍治 皆川 昌紀 星野 学 市川 和利 池辺 卓 志村 保美 東 清三郎

出版者

一般社団法人日本建築学会

雑誌

学術講演梗概集. C-1, 構造III, 木質構造, 鉄骨構造, 鉄骨鉄筋コンクリート構造 (ISSN:1341447X)

巻号頁・発行日

vol.2001, pp.761-762, 2001-07-31

被引用文献数

3