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Physical Properties of Directionally Solidified Al-1.9Mn-5Fe Alloy

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Abstract

Al-1.9Mn-5Fe (wt.%) alloy was prepared by adding 5 wt.% Fe to the eutectic Al-Mn alloy. This alloy undergone controlled solidification under four different growth velocities (V) in Bridgman-type furnace. Eutectic spacings (λ), microhardness (HV), ultimate tensile strength (σU) and electrical resistivity (ρ) of these alloys were determined. While the HV and σU increased with increasing V values or decreasing λ, the elongation (δ) values decreased. In addition, relationships between these parameters were investigated using linear regression analysis. Microstructure photographs of directionally solidified samples were taken by optical microscope and scanning electron microscope (SEM). The eutectic spacings were measured from these photographs. The relationships among growth velocity (V), eutectic spacing (λ), microhardness (HV), ultimate tensile strength (σU) and electrical resistivity (ρ) were measured by suitable method and tests. The ρ measurements were carried out depending on V and temperature (T). While temperature coefficient of resistivity (αTCR) was calculated from the ρ–T curve, the values of thermal conductivity (K) predicted by Wiedemann–Franz (W–F) and Smith–Palmer (S–P) equations. It was found that the microstructure, microhardness, tensile strength and electrical resistivity were affected by both eutectic spacing and the growth velocity.

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Acknowledgments

This work was supported by the ERU, Scientific Research Project Unit (FBA-2015-5631). The authors are grateful for the supports to ERU Scientific Research Project Unit.

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Authors and Affiliations

  1. Department of Science Education, Faculty of Education, Erciyes University, Kayseri, Turkey

    İ. Yılmazer, H. Kaya & U. Büyük

  2. Department of Physics, Faculty of Arts and Sciences, Niğde Ömer Halisdemir University, Niğde, Turkey

    E. Çadırlı

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The original version of this article was revised: In the headings for subsections 2.2, 2.3, 3.2, 3.3, 3.4 and 3.5, the symbols λ, ρ, σ and σU should have been used (just as used in the Abstract) for eutectic spacing, electrical resistivity, tensile strength, and ultimate tensile strength, respectively.

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Yılmazer, İ., Çadırlı, E., Kaya, H. et al. Physical Properties of Directionally Solidified Al-1.9Mn-5Fe Alloy. J. of Materi Eng and Perform 30, 1603–1610 (2021). https://doi.org/10.1007/s11665-020-05253-3

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