Abstract
An analysis of the Cu4Ti precipitation process was carried out in binary Cu-Ti alloys using the conventional method and subsequently employing a diffusion-couple based method, known as the Macroscopic-Gradient Method. The phase separation took place via the mechanism of spinodal decomposition at early stages of aging. The precipitation of the β´ (Cu4Ti) phase preceded to that of the β (Cu3Ti) phase, which is formed by cellular precipitation. The highest hardness and fastest precipitation kinetics occurred at aging of 400 and 600 °C, respectively. In the case of the macroscopic gradient method, a diffusion couple of Cu-4 wt. Ti alloys and pure copper was prepared by a diffusion annealing. This analysis enabled to determine the equilibrium and coherent lines in this alloy system. The Gibbs-Thomson equation was verified for this type of precipitation.
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The authors wish to thank the financial support from SIP-COFAA-IPN and CONACYT.
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Hernandez-Santiago, F., Lopez-Hirata, V.M., Hernandez-Duran, P.E., Saucedo-Muñoz, M.L., Avila-Davila, E.O. (2017). Analysis of β´ Cu4Ti Precipitation in Cu-Ti Alloys by Conventional and Diffusion-Couple Methods. In: TMS, T. (eds) TMS 2017 146th Annual Meeting & Exhibition Supplemental Proceedings. The Minerals, Metals & Materials Series. Springer, Cham. https://doi.org/10.1007/978-3-319-51493-2_75
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DOI: https://doi.org/10.1007/978-3-319-51493-2_75
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