Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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中国有色金属学报

ZHONGGUO YOUSEJINSHU XUEBAO

第27卷    第4期    总第217期    2017年4月

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文章编号:1004-0609(2017)-04-0753-07
模量可变NiTi-NbTi原位复合材料
姜 江1,蒋小华2,姜大强2,郝世杰2,郭方敏2,崔立山2

(1. 江西省科学院 江西省铜钨新材料重点实验室,南昌 330029;
2. 中国石油大学(北京) 材料科学与工程学院,昌平 102249
)

摘 要: 为改善记忆合金复合材料中各复合组元间的耦合作用,利于材料功能特性的展现,原位合成一种NiTi-NbTi记忆合金复合材料。通过对NiTi-NbTi复合材料进行约束态热循环的方式,使样品中回复力达到应力诱发马氏体相变的临界应力,拉伸复合材料时NiTi直接相变,进而降低复合材料整体的表观弹性模量。拉伸结果表明:对于同种NiTi-NbTi复合材料,同样在120 ℃的拉伸温度下,未经历约束态热循环的样品表观弹性模量为64.5 GPa,而经历约束态升、降温热循环样品的表观弹性模量为55.2 GPa,弹性模量变化率为14.4%。

 

关键字: NiTi-NbTi复合材料;形状记忆合金;约束态马氏体相变

Modulus variable in-situ NiTi-NbTi composite
JIANG Jiang1, JIANG Xiao-hua2, JIANG Da-qiang2, HAO Shi-jie2, GUO Fang-min2, CUI Li-shan2

1. Jiangxi Key Laboratory of Advanced Copper and Tungsten Materials, Jiangxi Academy of Sciences, Nanchang 330029, China;
2. Department of Materials Science and Engineering, China University of Petroleum-Beijing, Changping 102249, China

Abstract:An in-situ NiTi-NbTi shape memory alloy composite was prepared to improve the coupling effect between the matrix and NiTi shape memory alloy and imporve the exhibition of functional properties of the composite. The recovery stress generated by NiTi embedded in the NiTi-NbTi composite can reach its critical transformation stress when it is subject to proper constraint thermal cycle, and therefore, the embedded NiTi can tranform immediately upon loading, which can make that the NiTi-NbTi composite exhibits a much lower apparent modulus. Tensile tests show that the same two samples under the same tenslie test temperature show two different apparent modulus. For the sample underwent constraint thermal cycle, the apparent modulus is 55.2 GPa, whereas, for another one without undergoing constraint thermal cycle, the apparent modulus is 64.5 GPa, and the rate of change is 14.4%.

 

Key words: NiTi-NbTi composite; shape memory alloy; constraint martensitic transformation

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

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