Study of the stability and decomposition process of the β phase in Cu-Al-Ni shape memory alloys

被引：42
|
作者：
Perez-Landazabal, J. I.
Recarte, V.
Sanchez-Alarcos, V.
No, M. L.
San Juan, J.
机构：
[1] Univ Publ Navarra, Dept Fis, Pamplona 31006, Spain
[2] Univ Basque Country, EHU, Fac Ciencia, Dept Fis Aplicada 2, E-48080 Bilbao, Spain
[3] Univ Basque Country, Fac Ciencias, Dept Fis Mat Condensada, E-48080 Bilbao, Spain
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2006年 / 438卷 / 734-737期
关键词：
shape memory alloys; decomposition process; martensitic transformation; differential scanning calorimetry; ultrasonic techniques;
D O I：
10.1016/j.msea.2005.12.066
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The influence of precipitation processes on the characteristics of the martensitic transformation in two Cu-Al-Ni shape memory alloys processed by powder metallurgy has been analyzed. The Cu-14.37Al-42M (wt.%) alloy with a hypereutectoid composition undergoes a low-temperature martensitic transformation, M-s < 100 degrees C. On the other hand, the Cu-14.15Al-3.25Ni (wt.%) near eutectoid composition undergoes a high-temperature martensitic transformation, M-s > 110 degrees C. The evolution of the kind of induced martensite, hysteresis and transformation temperatures as a function of thermal history has been studied by differential scanning calorimetry. Also, resonant ultrasound spectroscopy allows changes to be monitored of elastic constants during the evolution of the microstructure. Finally, a comparative analysis of the behavior of both alloys has been made. (c) 2006 Elsevier B.V. All rights reserved.
引用
收藏
页码：734 / 737
页数：4
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