Pre-martensitic phenomena in Ti40.7Hf9.5Ni44.8Cu5 shape memory alloy

被引：19
|
作者：
Resnina, N. [1 ]
Belyaev, S. [1 ]
Shelyakov, A. [3 ]
Rubanik, V. [4 ,5 ]
Rubanik, V., Jr. [4 ,5 ]
Konopleva, R. [2 ]
Chekanov, V. [2 ]
Ubyivovk, E. [1 ]
Krzhizhanovskaya, M. [1 ]
机构：
[1] St Petersburg State Univ, St Petersburg 199034, Russia
[2] BP Konstantinov Petersburg Nucl Phys Inst, Gatchina 188300, Russia
[3] Natl Res Nucl Univ MEPhl, Moscow Engn Phys Inst, Moscow 115409, Russia
[4] Inst Tech Acoust NAS Belarus, Vitebsk 210023, BELARUS
[5] Vitebsk State Technol Univ, Vitebsk 210035, BELARUS
来源：
INTERMETALLICS | 2015年 / 67卷
基金：
俄罗斯科学基金会;
关键词：
Shape-memory alloys; Martensitic transformation; Point defects; Differential scanning calorimetry; Diffraction/scattering; (electron; neutron and X-ray); THERMOELASTIC MARTENSITIC TRANSFORMATIONS; BEHAVIOR;
D O I：
10.1016/j.intermet.2015.07.018
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Pre-martensitic phenomena such as abnormal resistivity growth, diffusion scattering, "tweed" contrast and internal friction peak were observed in Ti40.7Hf9.5Ni44.8Cu5 alloy prior to the forward martensitic transformation on cooling. It was shown that all the observed phenomena were due to the formation of quasi-static strain nanodomains in the B2 phase prior to the forward martensitic transformation. This led to accumulation of the elastic energy before the phase transition and resulted in the variation in thermodynamic balance for the forward martensitic transformation and, as a result, influenced the parameters of the phase transition. The appearance of elastic energy prior to the forward transformation caused a decrease in the forward and reverse martensitic transformations' start temperatures, a widening of the temperature range of the reverse transformation and an increase in the hysteresis of the transformation. (C) 2015 Elsevier Ltd. All rights reserved.
引用
收藏
页码：69 / 74
页数：6
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