Strain variation during the isothermal martensitic transformation in the Ni51Ti49 shape memory alloy

被引：6

作者：

Ivanov, Aleksei ^{[1
]}

Belyaev, Sergey ^{[1
]}

Resnina, Natalia ^{[1
]}

Andreev, Vladimir ^{[2
,3
]}

机构：

[1] St Petersburg State Univ, Univ Skaya Nab 7-9, St Petersburg 199034, Russia

[2] MATEK SMA Ltd, Karier 2a-137, Moscow 117449, Russia

[3] RAS, Baikov Inst Met & Mat Sci, 49 Leninskii Pr, Moscow 119991, Russia

来源：

SENSORS AND ACTUATORS A-PHYSICAL | 2019年 / 297卷

基金：

俄罗斯科学基金会;

关键词：

Shape memory alloys (SMA); Martensitic phase transformation; Isothermal martensitic transformation; Strain variation; B2;

D O I：

10.1016/j.sna.2019.111543

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

The strain variation under constant tensile stress of 50 MPa during isothermal holding of the quenched Ni51Ti49 shape memory alloy is reported for the first time. A maximum strain of 0.4% is observed during holding at a temperature of -37 degrees C, which is 6 degrees C less than the start temperature of the martensitic transformation (M-s(sigma)). A shift in the holding temperature above or below the M-s(sigma). temperature decreases the isothermal strain. It is shown that the strain that appears during isothermal holding completely recovers on subsequent heating. This allows one to conclude that the strain variation on holding is caused by the martensitic transformation that occurs under isothermal conditions. (C) 2019 Elsevier B.V. All rights reserved.

引用

页数：3

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