2016 Fiscal Year Annual Research Report

鉄とアルミニウム原子間の異常相互作用の制御による新ステンレス鋼開発に向けた挑戦

Research Project

Project/Area Number	15J05185
Research Institution	Tohoku University
Principal Investigator	趙覓東北大学, 工学研究科, 特別研究員(PD)
Project Period (FY)	2015-04-24 – 2017-03-31
Keywords	B2-type FeAl / Point defect structure / Ordering behavior
Outline of Annual Research Achievements	In order to develop and popularize the Al-added stainless steels, B2-type FeAl was chosen in this study to investigate the interaction behavior between Fe and Al atoms. The point defect structure and ordering behavior of Fe-rich B2-type FeAl was focused on. The results from in situ XRD and HAADF-STEM indicated that the re-ordering process occurred in the intermediate temperature range. It was also found that the ordering state differs in the scale of nanometers in the material, which is probably caused by the variation of vacancy concentration. Therefore, when designing the Al-added stainless steels, it is important to take the point defects into consideration. For example, the thermal vacancies might affect the diffusion behavior, and thus the creep property of the alloy.
Research Progress Status	28年度が最終年度であるため、記入しない。
Strategy for Future Research Activity	28年度が最終年度であるため、記入しない。

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