Internal friction during martensitic transformations in ultra-high temperature Ru-Nb shape memory alloys

被引：2

作者：

No, M. L. ^{[1
]}

Dirand, L. ^{[1
]}

Denquin, A. ^{[2
]}

Usategui, L. ^{[3
]}

Lopez, G. A. ^{[1
]}

San Juan, J. ^{[3
]}

机构：

[1] Univ Basque Country, Fac Sci & Technol, Dept Appl Phys 2, Bilbao 64448080, Spain

[2] Off Natl Etud & Rech Aerosp, Dept Metall Mat & Struct, F-92320 Chatillon, France

[3] Univ Basque Country, Fac Sci & Technol, Dept Phys Condensed Matter, Bilbao 64448080, Spain

来源：

MATERIALS TODAY-PROCEEDINGS | 2015年 / 2卷

关键词：

Shape Memory Alloys; Ruthenium-Niobium; Internal Friction; Martensitic Transformation; LOW-FREQUENCY; MICROSTRUCTURE;

D O I：

10.1016/j.matpr.2015.07.405

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In the present work we have studied a high temperature Ru-50Nb (at.%) shape memory alloy using a mechanical spectrometer able to work in the temperature range from 473 to 1723 K. We have investigated two internal friction peaks, as well as the dynamic modulus variation, linked to the martensitic transformations in the range from 573 K to 1473 K. In addition, we have evidenced another internal friction peak P-LT at lower temperature than the transformation peaks, which apparently exhibits the behaviour of a thermally activated relaxation peak. However, we show that this peak is not a relaxation one because it exhibits a strongly time-dependent behaviour. We have carefully analysed this peak and discussed its microscopic origin, concluding that it is related to the interaction of some structural defects with martensite interfaces. (C) 2015 The Authors. Published by Elsevier Ltd.

引用

页码：809 / 812

页数：4

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