Variation in kinetics of martensitic transformation during partial thermal cycling of the TiNi alloy

被引：8

作者：

Belyaev, Sergey ^{[1
]}

Resnina, Natalia ^{[1
]}

Sibirev, Alexey ^{[1
]}

Lomakin, Ivan ^{[1
]}

机构：

[1] St Petersburg State Univ, St Petersburg 198504, Russia

来源：

THERMOCHIMICA ACTA | 2014年 / 582卷

关键词：

DSC; Martensitic transformation; Thermal cycling; Shape memory alloy; TiNi alloy; SHAPE-MEMORY ALLOY; STEP-WISE MARTENSITE; NITI; BEHAVIOR; TEMPERATURE;

D O I：

10.1016/j.tca.2014.03.002

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

A method of differential scanning calorimetry has been used for the study of variation in the kinetics of thermal elastic martensitic transformation during the thermal cycling of the equiatomic TiNi alloy through the different fractions of forward or reverse martensitic transformation temperature ranges. The results of the study have shown that "partial cooling" cycling results in damage to the crystalline structure in "transforming" and "austenite" volumes independently of whether or not "austenite" volumes undergo martensitic transformation during partial cycling. The structure damage in "martensite" volumes does not occur during "partial heating" cycling. It is caused by the fact that internal stresses relax through plastic strain in the austenite phase, resulting in an increase in defect density or the reorientation of martensite crystals in the martensite phase without the accumulation of defects. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：46 / 52

页数：7

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