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γ相對(duì)磁形狀記憶合金Co-Ni-Ga馬氏體相變和形狀記憶效應(yīng)的影響
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國(guó)家自然科學(xué)基金資助項(xiàng)目50671068


Influence of γ Phase on the Martensitic Transformation and Shape Memory Effect of Co-Ni-Ga Ferromagnetic Shape Memory Alloy
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    摘要:

    利用掃描電鏡、X射線衍射儀、差示掃描量熱分析儀和材料試驗(yàn)機(jī)等手段，研究不同熱處理?xiàng)l件下γ相對(duì)Co44Ni26Ga30合金馬氏體相變溫度、力學(xué)性能和形狀記憶效應(yīng)的影響。結(jié)果表明：隨熱處理保溫時(shí)間的延長(zhǎng)，γ相析出增多，使得馬氏體相變溫度降低；γ相的引入顯著改善合金的韌性，但損害了合金的形狀記憶回復(fù)性能；通過(guò)適當(dāng)?shù)臒釞C(jī)械訓(xùn)練可以大幅提高合金的形狀記憶回復(fù)能力，最大形狀回復(fù)率可達(dá)93%。

    Abstract:

    By means of SEM, XRD, DSC and a materials testing machine, the effects of γ phase on the martensitic transformation temperature Ms, mechanical properties and shape memory effect of Co44Ni26Ga30 alloy with different heat-treatments were investigated. Results show that the volume fraction of γ phase increased with prolonging the holding time during the heat treatment, giving rise to the decrease of Ms. The introduction of γ phase improved the ductility of the alloy greatly while deteriorated the shape memory recovery ratio. Upon appropriate thermo-mechanical training, the shape recovery ratio can be enhanced significantly to 93%.

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霍顏秋,龍秀慧,謝 華,李建國(guó).γ相對(duì)磁形狀記憶合金Co-Ni-Ga馬氏體相變和形狀記憶效應(yīng)的影響[J].稀有金屬材料與工程,2010,39(7):1279~1283.[Huo Yanqiu, Long Xiuhui, Xie Hua, Li Jianguo. Influence of γ Phase on the Martensitic Transformation and Shape Memory Effect of Co-Ni-Ga Ferromagnetic Shape Memory Alloy[J]. Rare Metal Materials and Engineering,2010,39(7):1279~1283.]
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  • 收稿日期:2009-06-22
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