Effect of Sc addition on the microstructure and mechanical properties of as-atomized and extruded Al-20Si alloys

    Authors

    M. F. Kilicaslan; W. R. Lee; T. H. Lee; Y. Sohn;S. J. Hong

    Comments

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    Abbreviated Journal Title

    Mater. Lett.

    Keywords

    Powder technology; Gas atomization; Rapid solidification; Al-Si alloys; AL-SI ALLOYS; SILICON; ZR; Materials Science, Multidisciplinary; Physics, Applied

    Abstract

    The microstructure evolution and mechanical properties of Al-20Si alloy with Sc addition were investigated after as-atomized and hot-extruded conditions. Microstructural and spectroscopic analyses demonstrate that Sc is enriched at the Si/Al interface. It could be observed that the presence of Sc refined the size of the primary and eutectic Si, without significantly affecting the shape. A considerable improvement in tensile strength, compressive strength, and elongation was observed due to addition in Sc percentage into the composition. The correlation between the microstructure and mechanical behavior strongly indicates that the addition of Sc modifies the Si particles by impurity induced twinning (IIT) mechanisms. (C) 2011 Elsevier B.V. All rights reserved.

    Journal Title

    Materials Letters

    Volume

    71

    Publication Date

    1-1-2012

    Document Type

    Article

    Language

    English

    First Page

    164

    Last Page

    167

    WOS Identifier

    WOS:000301034900049

    ISSN

    0167-577X

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