| 不同初始状态NiTi超弹丝传感性能的研究 |
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| 引用本文： | 姚兴田,邱自学,周一丹. 不同初始状态NiTi超弹丝传感性能的研究[J]. 机械工程材料, 2005, 29(12): 46-48,64 |
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| 作者姓名： | 姚兴田 邱自学 周一丹 |
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| 作者单位： | 南通大学机械工程学院,江苏,南通,226007 |
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| 基金项目： | 江苏省高校自然科学研究指导性计划资助项目（04KJD460138）;江苏省南通市科技带头人培养工程资助项目（33） |
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| 摘 要： | 为研究不同初始组织状态下NiTi超弹丝的传感性能，分别测试了NiTi超弹丝在恒温、恒应力及恒应变条件下的R-σ-ε、R-ε-t及R-σ-t关系曲线，并解释了其机理。结果表明：在已诱发完成马氏体相变的初始状态下进行恒应力及恒应变试验时，NiTi超弹丝的电阻受温度变化的影响较小，且与温度呈近似线性关系，降温与升温过程的电阻迟滞极小，NiTi超弹丝在该状态下用作智能材料与结构系统中的传感元件性能较好。
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| 关 键 词： | NiTi形状记忆合金 超弹丝 电阻 |
| 文章编号： | 1000-3738（2005）12-0046-03 |
| 收稿时间： | 2004-09-15 |
| 修稿时间： | 2004-09-152004-11-25 |
Sensing Properties of NiTi Superelastic-wire in Different Initial States |
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| YAO Xing-tian,QIU Zi-xue,ZHOU Yi-dan. Sensing Properties of NiTi Superelastic-wire in Different Initial States[J]. Materials For Mechanical Engineering, 2005, 29(12): 46-48,64 |
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| Authors: | YAO Xing-tian QIU Zi-xue ZHOU Yi-dan |
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| Affiliation: | Nantong University, Nantong 226007, China |
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| Abstract: | In order to study the sensing properties of NiTi superelastic-wire in different initial states, resistance-stress-strain relationship at constant temperature, resistance-strain-temperature relationship at constant stress and resistance-stress-temperature relationship at constant strain were tested. Their mechanisms are explained. For NiTi superelastic-wire subjected to constant stress or constant strain after finishing stress-induced martensitic transformation, effect of temperature variation on resistance nature was tiny, resistance-temperature relationship was nearly linear and hysteresis loop hardly appeared, so NiTi superelastic-wire in this state has good sensing property and can be used as sensors in intelligent materials and structures. |
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| Keywords: | NiTi shape memory alloy superelasti-wire resistance |
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