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Influence of Al on glass forming ability and nanocrystallization behavior of cast-iron based bulk amorphous alloy

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Abstract

Cast-iron (CI) based bulk amorphous alloy with compositions of Fe75.5−xC6.0Si3.3B5.5P8.7Cu1.0Alx (x = 0, 1 at.%) was synthesized by Cu mold casting. As indicated by increased critical diameters (dmax) for the amorphization, the substitution of Al enhanced the glass-forming ability of the alloy. However, the onset temperature of crystallization (Tx) and the range of supercooled liquid region (ΔTx) of the alloy decreased upon Al addition from 500 °C and 28 °C to 475 °C and 25 °C, respectively. It was revealed that the decreased thermal stability of the amorphous phase is related to the enhanced crystallization tendency to form primary α-Fe phase. Upon the nanocrystallization of primary α-Fe phase the Al-added alloy shows enlarged Ms of 176 emu g−1, still keeping a reasonable small Hc value of 0.086 Oe. The present study revealed that the minor Al addition enhances not only the glass-forming ability, but also the nanocrystallization behavior of the CI based bulk amorphous alloy.

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ACKNOWLEDGMENTS

This work was supported by the Global Research Laboratory Program of the Korea Ministry of Science and Technology. The support of the German Science Foundation (DFG) through the grants STO 873/2-1 and STO 873/2-2 is also acknowledged.

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Authors and Affiliations

  1. Institute for Complex Materials, IFW Dresden, D-01069, Dresden, Germany

    Hyo Yun Jung, Mihai Stoica & Jürgen Eckert

  2. Politehnica University of Timisoara, 300006, Timisoara, Romania

    Mihai Stoica

  3. Department of Materials Science and Metallurgical Engineering, Kyungpook National University, Daegu, 702-701, South Korea

    Seong Hoon Yi

  4. Department of Metallurgical Engineering, Center for Non-crystalline Materials, Yonsei University, 120-749, Seoul, South Korea

    Do Hyang Kim

  5. Institute of Materials Science, University of Technology, Dresden, D-01062, Dresden, Germany

    Jürgen Eckert

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  1. Hyo Yun Jung
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  2. Mihai Stoica
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Correspondence to Hyo Yun Jung.

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This author was an editor of this focus issue during the review and decision stage. For the JMR policy on review and publication of manuscripts authored by editors, please refer to www.mrs.org/jmr-editor-manuscripts/.

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Jung, H.Y., Stoica, M., Yi, S.H. et al. Influence of Al on glass forming ability and nanocrystallization behavior of cast-iron based bulk amorphous alloy. Journal of Materials Research 30, 818–824 (2015). https://doi.org/10.1557/jmr.2015.48

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