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The Effect of Magnesium Additions on Microstructural, Thermal, and Mechanical Properties of Rapidly Solidified Al-5.5wt.%Zn-x wt.%Mg (x = 1, 5) Alloys

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Abstract

The effect of magnesium addition on the morphological, thermal, and mechanical features of conventionally and rapidly solidified Al-5.5 wt.%Zn-x wt.%Mg (x = 1, 5) samples were examined in this work. Al-5.5wt.%Zn-x wt.%Mg (x = 1, 5) samples were produced by the conventionally solidified graphite casting and rapid solidification by the melt-spinning method. The morphological and phase structures of the alloys were shown by field emission scanning electron microscopy and x-ray diffractometry. The melting temperatures were examined by differential thermal analysis in an Argon gas environment and the stress and microhardness characteristics of the conventionally solidified and melt-spun ribbons were determined by hardness and tensile strength tests. It was observed that the content of 5 wt.%Mg allowed a radical change in the conventionally solidified alloy morphologies, such as nano-sized dot shape Al12Mg17 particles and smaller sized square shaped MgZn2 particles. Moreover, the ultimate tensile strength, yield strength, and microhardness values of the rapidly solidified Al-5.5Zn-5Mg samples increased by approximately 20%. Finally, it was observed that the microstructural and mechanical properties, such as microhardness/stress values and grain size refinement, were improved with high wheel speeds.

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Acknowledgments

This study was financed by Erciyes University Research Fund, Grant No. FYL-2017-7348 and Çankırı Karatekin University Research Fund, Grant No: FF200217B31.

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Authors and Affiliations

  1. Department of Natural Sciences of Engineering, Faculty of Engineering, Architecture and Design, Kayseri University, 38039, Kayseri, Turkey

    Ercan Karaköse

  2. Department of Chemistry, Faculty of Sciences, Çankırı Karatekin University, 18100, Çankırı, Turkey

    Hakan Çolak

  3. Department of Physics, Faculty of Sciences, Erciyes University, 38039, Kayseri, Turkey

    Mustafa Keskin

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  1. Ercan Karaköse
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  3. Mustafa Keskin
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Karaköse, E., Çolak, H. & Keskin, M. The Effect of Magnesium Additions on Microstructural, Thermal, and Mechanical Properties of Rapidly Solidified Al-5.5wt.%Zn-x wt.%Mg (x = 1, 5) Alloys. J. of Materi Eng and Perform 29, 7308–7320 (2020). https://doi.org/10.1007/s11665-020-05246-2

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