中国石油大学学报（自然科学版）2012，Vol.36Issue(3)：151-154,164,5.DOI:10.3969/j.issn.1673-5005.2012.03.026
超细片层NbTi/TiNi记忆合金复合材料的制备与功能特性
Preparation and functional properties of ultrafine lamellar NbTi/TiNi shape memory alloy composites
摘要
Abstract
Based on the eutectic transformation of NbTi-TiNi, a series of hypereutectic NbTiNi alloys with NbTi and TiNi shape memory alloy dual phase structure were designed and obtained by arc melting method. Such alloy is a kind of in-situ NbTi/TiNi shape memory alloy composite with NbTi matrix and TiNi functional component. The reversible martensitic transformation temperature and the volume fraction of the embedded TiNi can be controlled by adjusting the Ti/Ni atomic ratio and Ni ( Nb) content of the alloy. After forging and wire drawing the NbTiNi alloy ingots, NbTi and NiTi phases became micron scale lamellas. Then an ultrafine lamellar NbTi/TiNi shape memory alloy composite wire with high yield strength was obtained. As the specific surface area of ultrafine TiNi lamellar is large, and the interface bonding of the NbTi/TiNi phase is much strong, the coupling effect between the NiTi lamellar and NbTi matrix can be represented effectively. The thermal expansion and mechanical properties were tested using dilatometer and universal tensile test machine. The results show that some new functional properties were observed, such as high yield strength(more than 1.6 GPa) , negative thermal expansion point memory effect and strain induced modulus softening effect.关键词
记忆合金复合材料/制备/马氏体相变/负膨胀/应变软模/共晶转变/特性Key words
shape memory alloy composites/ preparation/ martensitic transformation/ negative thermal expansion/ strain induced modulus softening/ eutectic transformation/ property分类
通用工业技术引用本文复制引用
姜江,崔立山,姜大强,蒋小华,焦淑静..超细片层NbTi/TiNi记忆合金复合材料的制备与功能特性[J].中国石油大学学报（自然科学版）,2012,36(3):151-154,164,5.基金项目
国家自然科学基金项目(50971133) （50971133）
