2009 Fiscal Year Final Research Report
Formation and hydrogen permeability of anisotropic alloys
| Project/Area Number |
19686040
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| Research Category |
Grant-in-Aid for Young Scientists (A)
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| Allocation Type | Single-year Grants |
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| Research Field |
Structural/Functional materials
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| Research Institution | Kitami Institute of Technology |
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Principal Investigator |
ISHIKAWA Kazuhiro Kitami Institute of Technology, 工学部, 准教授 (10312448)
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| Project Period (FY) |
2007 – 2009
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| Keywords | 水素透過 / 組織制御 / 耐水素脆化性 / 固溶係数 / 拡散係数 / 加工性 |
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| Research Abstract |
The microstructures of Nb-TiNi alloys consisted of the bcc-(Nb, Ti) and B2-TiNi phases are controlled, and the relation between microstructure and hydrogen permeability is investigated. Hydrogen permeability along the normal direction in an anisotropic alloy prepared by heavy working can be improved at lower temperature and/or shorter annealing period with increasing thickness reduction. Lamellar microstructure of the eutectic Nb-TiNi alloy is disappeared by annealing forming granular two-phase structure, and its hydrogen permeability is reduced, which is caused from a reduction of hydrogen diffusivity.
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