Abstract
The heat treatment techniques are significant methods for improving metals and alloys. Particularly, it is important to control transformation temperature and improve mechanical and physical properties of materials. There are two important parameters that can be controlled, which are temperature and time of aging. In this study, a quaternary Cu79–Al12–Ni4–Nb5 (wt%) alloy was produced using arc melting under an atmosphere control. The alloy was aged isothermally at 1073 K for 1, 2, 3, 6, 12, and 24 h. The map of constituents showed that neither Cu contributed in Nb-rich phases nor Nb dissolved in the matrix. The martensitic phase transformation for as-casted and aged specimens was carried out using a DSC device. The phase transformation was generally shifted to the higher temperature by increasing the time of aging, but the alloy lost its shape memory feature when it was aged for 24 h. XRD and optical microscopy were utilized to investigate characterizations of the alloy. Additionally, the aging introduced multiphases in the alloys and the intensity of XRD peaks was increased by increasing the time of aging up to 3 h.
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This work has been supported by the Management Unit of Scientific Research Projects of Firat University (FUBAP) (Project Number: FF.19.06).
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Qader, I.N., Ercan, E., Faraj, B.A.M. et al. The Influence of Time-Dependent Aging Process on the Thermodynamic Parameters and Microstructures of Quaternary Cu79–Al12–Ni4–Nb5 (wt%) Shape Memory Alloy. Iran J Sci Technol Trans Sci 44, 903–910 (2020). https://doi.org/10.1007/s40995-020-00876-6
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DOI: https://doi.org/10.1007/s40995-020-00876-6