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鐵磁性Co-Fe記憶合金的馬氏體相變特性及形狀記憶效應(yīng)
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國(guó)家自然科學(xué)基金(50771086)；福建省新世紀(jì)優(yōu)秀人才支持計(jì)劃項(xiàng)目資助


Martensitic Transformation Behavior and Shape Memory Effect of Co-Fe Ferromagnetic Shape Memory Alloys
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    采用光學(xué)顯微鏡、X射線衍射、DSC、彎曲試驗(yàn)等方法研究了Co-Fe合金的微觀組織結(jié)構(gòu)、馬氏體相變特性及形狀記憶效應(yīng)。結(jié)果表明：Co-Fe合金的記憶效應(yīng)源自合金中的fcc/hcp馬氏體相變；Co-xFe (x=2%~6%, 質(zhì)量分?jǐn)?shù))合金在x≥5.65%時(shí)為單一fcc結(jié)構(gòu)的γ相，在x≤5.6時(shí)為含有ε馬氏體相和γ相的雙相組織；該合金的馬氏體相變溫度隨著Fe含量的增加而線性降低，之間關(guān)系為：Ms (℃) = 417－69.97x(Fe%)；Co-4Fe合金的形狀記憶可回復(fù)應(yīng)變最大為0.86%，相信通過(guò)進(jìn)一步的

    Abstract:

    Microstructure, martensitic transformation temperature and shape memory effect of Co-Fe alloys were investigated by optical observation, X-ray diffraction, DSC and bending tests. Results show that the shape memory effect of Co-Fe alloys is associated with the fcc/hcp martensitic transformation. When Fe content is higher than 5.65wt%, the microstructure exhibits single γ phase with fcc structure. When Fe content is lower than 5.6wt%, the microstructure consists of γ phase and ε martensitic phase with hcp structure. The martensitic transformation temperatures of Co-xFe alloys are almost linearly decreased with increasing Fe content, following the relationship: Ms (℃) = 417-69.97x(Fe%). The highest recoverable strain of Co-4Fe (wt%) alloy is 0.86%. It is believed that Co-Fe alloys will exhibit better shape memory effect after proper heat treatment and shape memory training

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馬云慶,江惠芳,楊水源,王翠萍,劉興軍.鐵磁性Co-Fe記憶合金的馬氏體相變特性及形狀記憶效應(yīng)[J].稀有金屬材料與工程,2009,38(3):409~412.[Ma Yunqing, Jiang Huifang, Yang Shuiyuan, Wang Cuiping, Liu Xingjun. Martensitic Transformation Behavior and Shape Memory Effect of Co-Fe Ferromagnetic Shape Memory Alloys[J]. Rare Metal Materials and Engineering,2009,38(3):409~412.]
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  • 收稿日期:2008-02-19
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