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熱機(jī)械訓(xùn)練影響TiNiCu記憶合金DSC曲線特征的研究
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TG139.6

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國家自然科學(xué)基金(10175042)，中國工程物理研究院基金(99040536)，四川省杰出青年基金資助課題


Effect of Thermo-Mechanical Training on Characterization of DSC Curves of TiNiCu Shape Memory Alloys
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    摘要:

    利用示差掃描量熱法(DSC)研究了加熱伸長、冷卻收縮和加熱收縮、冷卻伸長2種TiNiCu雙向記憶效應(yīng)彈簧訓(xùn)練過程中相變特征。研究結(jié)果表明，訓(xùn)練前升溫時，DSC曲線表現(xiàn)出吸熱峰由多個小峰組成，隨著訓(xùn)練次數(shù)的增加，峰的個數(shù)減少，具有穩(wěn)定雙向記憶效應(yīng)的試樣中，升溫時只出現(xiàn)1個銳利的峰。這是因?yàn)樵谟?xùn)練過程中引入特定取向的位錯，產(chǎn)生一定的應(yīng)力場，使得馬氏體變體的取向比較一致，相變點(diǎn)基本相同所導(dǎo)致。并由于位錯的引入，引起相變點(diǎn)As和Af下降。

    Abstract:

    Transformation characters of two kinds of TiNiCu two-way shape memory effect (TWSME) spring during excension and contraction training were investigated by DSC measurement during thermo-mechanical training. One of the TWSME spring could extend upon heating and contract upon cooling, the other could contract upon heating and extend upon cooling. The results showed that before training the profile of endothermic peaks were composed of several small peaks. With training the amount of the small peaks decreased. After the stabilized TWSME induced into the TiNiCu alloy, there was only one sharp peak appear. This can attribute to the dislocations structures creates an anisotropic stress field, which guides the orientation of martensite variants very similar. And the dislocations also leads to the decrease of As and Af.

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王治國 祖小濤 吳繼紅 戴晶怡 傅平 楊樹正.熱機(jī)械訓(xùn)練影響TiNiCu記憶合金DSC曲線特征的研究[J].稀有金屬材料與工程,2004,33(10):1052~1055.[Wang Zhiguo, Zu Xiaotao, Wu Jihong, Dai Jingyi, Fu Ping, Yang Shuzheng. Effect of Thermo-Mechanical Training on Characterization of DSC Curves of TiNiCu Shape Memory Alloys[J]. Rare Metal Materials and Engineering,2004,33(10):1052~1055.]
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  • 最后修改日期:2004-04-19
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