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Microstructural evolution and mechanical properties of misch metal added Mg-Si alloys

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Abstract

Effect of misch metal additions (0.3, 0.6, 0.9 and 1.2 wt%) on the refinement of Mg2Si phase in Mg-1.15Si alloy has been studied and compared with the base alloy. MM addition effectively refines the microstructure by breaking the α-Mg halos and lamellar eutectic phase and the maximum refinement is obtained for 0.6 MM addition. For higher MM additions (0.9 and 1.2 wt%), the refinement effect gets reduced and the formation of RE-Si compound is dominated. Improved tensile properties are obtained with the addition of MM and are attributed to the refinement of microstructure and the presence RE-Si compound. The tensile properties obtained are correlated with the microstructure and mirofractomechnisms.

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Authors and Affiliations

  1. CSIR-National Institute for Interdisciplinary Science and Technology, Materials Science and Technology Division, Thiruvananthapuram, 695019, India

    K. K. Ajith Kumar, U. T. S. Pillai & B. C. Pai

  2. Indian Institute of Technology Bhubaneswar, Bhubaneswar, 751013, India

    K. K. Ajith Kumar & M. Chakraborty

Authors
  1. K. K. Ajith Kumar
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  2. U. T. S. Pillai
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  3. B. C. Pai
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  4. M. Chakraborty
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Correspondence to U. T. S. Pillai.

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Ajith Kumar, K.K., Pillai, U.T.S., Pai, B.C. et al. Microstructural evolution and mechanical properties of misch metal added Mg-Si alloys. Met. Mater. Int. 19, 1167–1172 (2013). https://doi.org/10.1007/s12540-013-6001-3

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  • DOI: https://doi.org/10.1007/s12540-013-6001-3

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