2015 Fiscal Year Final Research Report
Fabrication of partially stabilized austenitic steel with high strength and performance against hydrogen embrittlement
Project/Area Number |
26630352
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Research Category |
Grant-in-Aid for Challenging Exploratory Research
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Allocation Type | Multi-year Fund |
Research Field |
Structural/Functional materials
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Research Institution | Kyushu University |
Principal Investigator |
Takaki Setsuo 九州大学, 工学(系)研究科(研究院), 教授 (90150490)
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Project Period (FY) |
2014-04-01 – 2016-03-31
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Keywords | 鉄鋼材料 |
Outline of Final Research Achievements |
In this study, the stabilization of surface austenite layer was attempted by applying the solid nitrogen absorption treatment in order to realize the high strength and performance against hydrogen embrittlement in a conventional austenitic stainless steel (SUS 304). As a result, it was found that 1) the austenite phase containing 0.4% or more is stable even after 60% cold working, 2) the stable austenite layer plays a role to retard the hydrogen absorption from the surface, 3) the center potion of material has been strengthened to a high level by the deformation induced martensitic transformation. As expected in the initial research plan, a high strength stainless steel with high performance against hydrogen embrittlement could be fabricated by applying the solid nitrogen absorption treatment to SUS 304.
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Free Research Field |
鉄鋼材料
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