Investigation of the thermal and microstructural changes of CuAlNiNb quaternary shape memory alloys by different niobium amount

被引：7
作者：
Cirak, Z. Deniz [1 ]
Kok, Mediha [2 ]
机构：
[1] Inonu Univ, Vocat Sch Hlth Serv, Malatya, Turkey
[2] Firat Univ, Dept Phys, Fac Sci, Elazig, Turkey
来源：
EUROPEAN PHYSICAL JOURNAL PLUS | 2018年 / 133卷 / 07期
关键词：
PHASE-TRANSFORMATION CHARACTERISTICS; MECHANICAL-PROPERTIES; HEAT-TREATMENT; STABILITY; ADDITIONS; BEHAVIOR; ELEMENT; COBALT;
D O I：
10.1140/epjp/i2018-12150-7
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Among the CuAl-based alloys, the most useful one is the CuAlNi ternary shape memory alloy. There are studies on the development of these alloys. In this study, beta-Nb element was added to the CuAlNi alloy as a fourth element at various rates. The effect of the doped Nb element on the martensitic transformation temperature of the CuAlNi-shape memory alloy was determined by differential scanning calorimetry (DSC). When the value of transformation temperature in quaternary CuAlNi alloys increased, as a result, austenite start and martensite start temperatures are close to each other. Crystalline structure analysis with X-ray diffractometer revealed that beta 1' and gamma 1' phases were found in Cu83.5Ni3.5Al13 alloy, which is the main alloy, while crystal structure of beta-Nb phase was also found with Nb addition. Likewise, the same phases were determined by SEM-EDX analysis. In addition, the result of Vickers hardness measurements indicated that the hardness value of CuAlNi alloys increased by extent of contribution of Nb.
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页数：6
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