Microstructural evolutions and hardness during heat treatment of Al64Cu20Fe12Si4 quasicrystal alloy |
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| Authors: | Ercan Karaköse Mustafa Keskin |
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| Affiliation: | 1. Faculty of Sciences, Department of Physics , Karatekin University , 18100 ?ank?r? , Turkey ekarakose@karatekin.edu.tr;3. Faculty of Sciences, Department of Physics , Erciyes University , 38039 Kayseri , Turkey |
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| Abstract: | The microhardness and microstructural characteristics and subsequent heat treatment of conventionally solidified Al64Cu20Fe12Si4 quasicrystal were investigated by X-ray diffractometry (XRD), scanning electron microscopy (SEM) together with energy dispersive spectroscopy (EDS), differential thermal analysis (DTA), and Vickers microhardness tester. XRD analysis indicated that the conventionally solidified samples showed a quasicrystalline icosahedral phase (i-phase) together with cubic β-AlFe, tetragonal θ-Al2Cu, and monoclinic λ-A13Fe4 crystal phases. However, the i-phase together with cubic β-AlFe and monoclinic λ-A13Fe4 phases observed heat threaded samples. As-cast and subsequently heat-treated quasicrystal samples were measured using a microhardness test device. Vickers microindentation tests were carried out on the heat-treated quasicrystal samples with the load ranging from 1 to 500?mN at room temperature. The melting point of the i-phase was determined as 900°C by DTA examinations. |
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| Keywords: | mechanical testing microhardness quasicrystal scanning electron microscopy |
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