Martensitic transformations and functional properties of thermally and thermomechanically treated Ti-Ni-Nb-based alloys

被引：11

作者：

Abramov, V. Ya.

Aleksandrova, N. M.

Borovkov, D. V.

Khmelevskaya, I. Yu.

Korotitskiy, A. V.

Makushev, S. Yu.

Polyakova, N. A.

Popov, N. N.

Prokoshkin, S. D.

机构：

[1] Moscow State Inst Steel & Alloys Technol Univ, Moscow 119049, Russia

[2] All Russian Res Inst Expt Phys, Russian Fed Nucl Ctr, Sarov, Russia

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2006年 / 438卷

关键词：

martensitic transformation; shape memory alloys; hysteresis of the martensitic transformation; thermomechanical couplings; high-temperature thermomechanical treatment; TiNi-based alloys;

D O I：

10.1016/j.msea.2006.05.170

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The aim of the present work is the detailed investigation of the structure, martensitic transformations and functional properties of the wide-hysteresis Ti-Ni-Nb-based shape memory alloys intended for the thermomechanical coupling (TMC) development. The 45Ti-45Ni-10Nb and 42.5Ti-46.5Ni-8Nb-3Zr (at.%) alloys have been studied. Zr addition results in martensitic hysteresis widening that promotes an improvement of the material functional properties. High-temperature thermomechanical treatment (HTMT) is an effective method for the optimization of Ti-Ni-Nb-based shape memory alloys properties. HTMT increases recovery strain and shape recovery rate as well as provides a favorable effect on the recovery stress generation and relaxation. The alloys compositions and treatments which allow designing the room-temperature-stored TMCs for tubes or pipes joints, reliable within the temperature range above -60 degrees C and easily dismantled when cooling in liquid nitrogen, have been proposed. (c) 2006 Published by Elsevier B.V.

引用

页码：553 / 557

页数：5

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