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DEVELOPMENT OF SHAPE MEMORYALLOYS WITH SPECFIC PROPERTIES

具有特定性能的形状记忆合金的开发

基本信息

批准号：
17360343
负责人：
NISHIDA Minoru
金额：
$ 8.63万
依托单位：
Kyushu University (2007)Kumamoto University (2005-2006)
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2005
资助国家：
日本
起止时间：
2005 至 2007
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-17360343/
关键词：
Low Temperature Superelasticity High Temperature Shane Memory B-Ti alloys Transmission Electron Microscopy Multistage Transformation Antiphase Domain Boundary Grain Boundary Control B2-Type Intermetallic Compound B2型金属間化合高信頼性中・高温形状記憶合金

项目摘要

The purpose of the present study consists of four folds as listed below.1) Development of low temperature superelastic Alloy, 2) Medium and high temperature shape memory and superelastic alloy,3)β-Ti and Zr shape memory and superelastic alloys for medical use, 4) New shape memory alloy comparable to Ti-Ni.In the first purpose, although we have tried to utilize the multistage martensitic transformation (MMT)phenomena to develop the low temperature super elastic alloy, we cannot obtain the sound property. However, we have systematically clarified the effect of parent grain size, alloy composition and heat treatment conditions on the MMT.In the second purpose, microstructures in Ti-Pd and Ti-Pt alloys which are promising candidates of high temperature shape memory and superelastic materials have been investigated by transmission electron microscopy (TEND).The atomic arrangement of antiphase domain in Ti-Pd alloy and the internal defects of B19 martensite in Ti-Pt alloy have been determined.High performance β-TiMoSn alloys with various yield stresses have been developed in the third purpose. However, α"martensitic transformation which is origin of shape memory and superelastic properties cannot detected in β-Zr alloys. The trial product of medical guide wire has been made of the developed β-Ti alloy.In the fourth purpose, new B2 type intermetallic compounds with shape memory effect and high ductility have been developed in Co-Zr-Ni and Co-Zr-Pd ternary systems. However their performance is not comparable to that of TiNi alloys.

本研究的目的包括以下四个方面：1）低温超弹性合金的开发，2）中高温形状记忆和超弹性合金，3）医用β-Ti和Zr形状记忆和超弹性合金，4）与Ti-Ni相当的新型形状记忆合金。虽然我们试图利用多级马氏体相变（MMT）现象来开发低温超弹性合金，但我们不能获得良好的性能。然而，我们已经系统地阐明了母体晶粒尺寸、合金成分和热处理条件对MMT的影响。利用透射电子显微镜（TEND）研究了高温形状记忆和超弹性材料Ti-Pd和Ti-Pt合金的微观结构，并对Ti-Pd和Ti-Pt合金中反相畴的原子排列进行了研究。第三，研制了具有不同屈服应力的高性能β-TiMoSn合金。而β-Zr合金中没有发现形状记忆和超弹性的起源α“马氏体相变。第四，在Co-Zr-Ni和Co-Zr-Pd三元系中，研制出具有形状记忆效应和高延展性的新型B2型金属间化合物。然而，它们的性能不能与TiNi合金相比。