2016 Fiscal Year Final Research Report
Solubility and diffusivity of Boron in Iron
| Project/Area Number |
26420670
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Physical properties of metals/Metal-base materials
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| Research Institution | Tohoku University (2016)
National Institute for Materials Science (2014-2015) |
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Principal Investigator |
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| Project Period (FY) |
2014-04-01 – 2017-03-31
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| Keywords | 鉄鋼 / 拡散 / 固溶限 / 軽元素 / グロー放電発光分光分析 |
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| Outline of Final Research Achievements |
The goal of this research is to obtain the knowledge of diffusivity and solubility of B in Fe for the establishment of an effective design of boron-doped low alloy steels. The concentration profiles by long range diffusion of boron in the diffusion couples were analyzed by rf-GDOES, by which the solubility was determined. The detection limit and the quantitative limit of boron in Fe by rf-GDOES were found to be 1.7 and 3.3 wt.ppm, respectively. The solubility of B in γ-Fe within the temperature range of 950-1050 C are found to be 20~40 wt.ppm. The diffusivity of B in γ-Fe was found to be so fast that its diffusion mechanism was indicated to be an interstitial diffusion.
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| Free Research Field |
金属物性
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