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Effects of Gd addition on the thermal and microstructural behaviors of the as-cast Cu–9 %Al and Cu–9 %Al–10 %Mn alloys

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Abstract

The effects of Gd addition on the thermal and microstructural behaviors of as-cast samples of the Cu–9 %Al and Cu–9 %Al–10 %Mn alloys were investigated using different experimental techniques. The results showed that the addition of Gd does not significantly interfere in the melting and solidification temperatures of the Cu–9 %Al alloy, but it decreases the stability of β′ martensitic phase during re-heating of sample, while the presence of Mn slows the β(A2) phase decomposition during cooling and widens its stability field. The Cu–9 %Al–10 %Mn–3 %Gd alloy has characteristics close to those observed for the Cu–9 %Al–10 %Mn alloy, but the presence of Mn increases the solubility of Gd and induces the formation of Gd-rich precipitates with average size of 200 nm.

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Acknowledgments

The authors thank FAPESP (2015/18996-0) and CNPq for the financial support, and LNNano for technical support during electron microscopy work (FEI Inspect F50 – High Resolution SEM).

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Authors and Affiliations

  1. Departamento de Ciências Exatas e da Terra, UNIFESP, Diadema, SP, Brazil

    G. F. Brazolin, A. B. Oliveira & R. A. G. Silva

  2. Department of Physics, Faculty of Science, Fırat University, Elazig, Turkey

    C. Aksu Canbay & S. Ozgen

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  1. G. F. Brazolin
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  2. C. Aksu Canbay
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  3. S. Ozgen
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  4. A. B. Oliveira
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  5. R. A. G. Silva
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Correspondence to R. A. G. Silva.

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Brazolin, G.F., Canbay, C.A., Ozgen, S. et al. Effects of Gd addition on the thermal and microstructural behaviors of the as-cast Cu–9 %Al and Cu–9 %Al–10 %Mn alloys. Appl. Phys. A 122, 928 (2016). https://doi.org/10.1007/s00339-016-0474-0

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