Phase Transition from BCC Phase in Fe-Mn-based Alloys with Anomalously Small Entropy Change

异常小熵变的铁锰基合金中 BCC 相的相变

• 批准号: 23686097
• 负责人: OMORI Toshihiro
• 金额: $ 17.8万
• 依托单位: Tohoku University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Young Scientists (A)
• 财政年份: 2011
• 资助国家: 日本
• 起止时间: 2011-04-01 至 2014-03-31
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-23686097/
• 关键词: マルテンサイト変態; 鉄合金; 超弾性; 形状記憶; 形状記憶合金; 析出; 結晶粒径; エントロピー

The martensitic transformation from the alpha phase (BCC) to the gamma phase (FCC) in Fe-based alloys including Fe-Mn-Al-based alloy was investigated. It was found from the thermodynamic analysis that this phase transformation can occur due to the suppression of the magnetism of the alpha phase. It was also found that the thermoelastic transformation is obtained by the addition of Ni. Moreover, the Fe-Mn-Al-Ni alloy exhibits the superelasticity in a wide temperature range. The superelastic strain was strongly dependent on the microstructure and the grain size control was one of the most important factors.

研究了Fe-Mn-Al基合金中α相（BCC）向γ相（FCC）的马氏体相变。从热力学分析中发现，这种相变可以由于α相的磁性的抑制而发生。另外还发现，热弹性转变是通过Ni的加入而获得的。Fe-Mn-Al-Ni合金在较宽的温度范围内表现出超弹性。超弹性应变强烈依赖于显微组织，晶粒尺寸控制是最重要的因素之一。

项目成果

Microstructure and Martensitic and Magnetic Transformations in Fe-Mn-Al-Ni Shape Memory Alloy

Fe-Mn-Al-Ni 形状记忆合金的显微组织、马氏体和磁相变

• 发表时间: 2013
• 作者: T. Omori;M. Nagasako;R. Kainuma
• 通讯作者: R. Kainuma

東北大学貝沼研究室

东北大学贝沼实验室

Effect of grain size on superelasticity in Fe-Mn-Al-Ni shape memory alloy wire

• DOI: 10.1063/1.4820429
• 发表时间: 2013-09
• 期刊: APL Materials
• 影响因子: 6.1
• 作者: T. Omori;M. Okano;R. Kainuma

鉄系形状記憶合金の最近の展開

铁基形状记忆合金的最新进展

• 发表时间: 2011
• 期刊: ふぇらむ
• 作者: K. Ichikawa;T. Yokota;M. Gomi;貝沼亮介,大森俊洋,田中優樹,石田清仁
• 通讯作者: 貝沼亮介,大森俊洋,田中優樹,石田清仁

Texture Formation and Martensitic Transformation in Fe-Mn-Al bcc Alloys

Fe-Mn-Al bcc 合金的织构形成和马氏体转变

• 发表时间: 2011
• 作者: M. Okano;T. Omori;K. Ishida;R. Kainuma
• 通讯作者: R. Kainuma