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Ti含量對Ni53Mn23.5Ga23.5-xTix鐵磁性形狀記憶合金組織和性能的影響
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國家自然科學(xué)基金項目(50677005)


Effect of the Ti Content on Microstructure and Properties of Ni53Mn23.5Ga23.5-xTix Ferromagnetic Shape Memory Alloy
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    摘要:

    采用光學(xué)顯微鏡、示差掃描熱分析、交流磁化率測試和室溫壓縮試驗等方法系統(tǒng)研究Ti含量對Ni53Mn23.5Ga23.5-xTix (x=0, 0.5, 2, 3.5, 8, 15)合金的顯微組織、相變行為、力學(xué)行為和磁學(xué)特性的影響規(guī)律。結(jié)果表明：Ti元素在合金中的極限固溶度低于15%；隨著Ti含量的增加，合金的相變溫度和斷裂強度及斷裂應(yīng)變先逐漸增加后降低，其斷裂方式由沿晶斷裂轉(zhuǎn)變?yōu)榇┚嗔言俚窖鼐嗔?；而合金的居里溫度隨Ti含量的增加逐漸降低

    Abstract:

    The effect of the Ti content on polycrystalline microstructure, phase transformation behavior, mechanical behavior and magnetic properties of the Ni53Mn23.5Ga23.5-xTix (x = 0, 0.5, 2, 3.5, 8, 15, at%) ferromagnetic shape memory alloy was studied by means of OM, DSC, room temperature compression tests and ac susceptibility measurements. The results show that the solubility limit of Ti element in the alloys is below 15%. The transformation temperature, the fracture strength and the fracture strain increase at first and then decrease with increasing of the Ti content. Furthermore, it is concluded that Ti addition can change the fracture type of Ni53Mn23.5Ga23.5-xTix alloys from the intergranular fracture to the transgranular to the intergranular again. In addition, the Curie temperature decreases gradually with the increase of Ti content in Ni53Mn23.5Ga23.5-xTix alloys

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董桂馥,李學(xué)慧,李艷琴,部德才,劉志升,蔡 偉,高志勇,隋解和. Ti含量對Ni53Mn23.5Ga23.5-xTix鐵磁性形狀記憶合金組織和性能的影響[J].稀有金屬材料與工程,2010,39(10):1785~1789.[Dong Guifu, Li Xuehui, Li Yanqin, Bu Decai, Liu Zhisheng, Cai Wei, Gao Zhiyong, Sui Jiehe. Effect of the Ti Content on Microstructure and Properties of Ni53Mn23.5Ga23.5-xTix Ferromagnetic Shape Memory Alloy[J]. Rare Metal Materials and Engineering,2010,39(10):1785~1789.]
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  • 收稿日期:2009-09-25
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