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Magnesium Technology 2013 pp 335–339Cite as

Effects of Alloying Elements and Cooling Rate on Morphology of Phases in CaO Added Mg-Al-Si Alloys

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Abstract

Mg2Si formed by the addition of Si in Mg-Al alloys is the very useful intermetallic compound. However, Mg2Si phases in the Mg-Al-Si alloys are prone to forming undesirable, coarse Chinese script shape, which will deteriorate the mechanical properties of Mg alloys. Therefore, in order to modify the Chinese script shaped Mg2Si phases in the Mg-Al-Si alloys, many methods have been studied such as alloying addition of Ca or P. This study was aimed at improving the mechanical properties of CaO added Mg-Al-Si alloys by the addition of alloying elements and varying cooling rate to change of morphology of Mg2Si and CaMgSi phases. The micro structure s of specimens were observed by OM and SEM, and the phase analysis was performed by XRD, TEM and EDS. To evaluate the mechanical properties of tested alloys, tensile tests were carried out at room and high temperatures.

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Author information

Authors and Affiliations

  1. Casting Research Center, Korea Institute of Industrial Technology, Incheon, Korea

    Young-Gil Jung, Hyun Kyu Lim, Young-Ok Yoon & Shae K. Kim

  2. Dept. of Metallurgical Engineering, Yonsei University, Seoul, Korea

    Young-Gil Jung & Do Hyang Kim

Authors
  1. Young-Gil Jung
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  2. Hyun Kyu Lim
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  3. Young-Ok Yoon
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  4. Shae K. Kim
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  5. Do Hyang Kim
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Editor information

Editors and Affiliations

  1. Magnesium Processing Department, Magnesium Innovation Centre (MagIC) within the Helmholtz-Zentrum Geesthacht Zentrum für Material- und Küstenforschung, Geesthacht, Germany

    Norbert Hort (head, lecturer) (head, lecturer)

  2. Leuphana University, Lüneburg, Germany

    Norbert Hort (head, lecturer) (head, lecturer)

  3. Department of Materials Science and Engineering, North Carolina State University, USA

    Suveen Nigel Mathaudhu (Adjunct Assistant Pofessor) (Adjunct Assistant Pofessor)

  4. IND LLC, USA

    Neale R. Neelameggham (‘Guru’) (‘Guru’)

  5. Magnesium Elektron Group Worldwide, USA

    Martyn Alderman (Divisional Director of Technology) (Divisional Director of Technology)

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© 2013 TMS (The Minerals, Metals & Materials Society)

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Jung, YG., Lim, H.K., Yoon, YO., Kim, S.K., Kim, D.H. (2013). Effects of Alloying Elements and Cooling Rate on Morphology of Phases in CaO Added Mg-Al-Si Alloys. In: Hort, N., Mathaudhu, S.N., Neelameggham, N.R., Alderman, M. (eds) Magnesium Technology 2013. Springer, Cham. https://doi.org/10.1007/978-3-319-48150-0_56

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