Cirak, Z. DenizKok, Mediha2024-08-042024-08-0420182190-5444https://doi.org/10.1140/epjp/i2018-12150-7https://hdl.handle.net/11616/98416Among 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.eninfo:eu-repo/semantics/closedAccessPhase-Transformation CharacteristicsMechanical-PropertiesHeat-TreatmentStabilityAdditionsBehaviorElementCobaltArticle133710.1140/epjp/i2018-12150-72-s2.0-85051070911Q2WOS:000440468200005Q2