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Age hardening and precipitation in a cast magnesium-rare-earth alloy

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Abstract

The precipitation sequence responsible for the age-hardening behaviour of a cast Mg-1.3 wt% rare-earth alloy has been investigated by analytical electron microscopy. Very fine intermediate precipitates formed at an early stage of ageing. Plate-shaped Mg3MM β′ precipitates (MM = misch metal) and hexagonal prism-shaped Mg12MM β precipitates were primarily responsible for age hardening. Precipitate morphologies, crystal structures and crystallographic orientation relationship were determined for the various types of precipitates that formed during ageing at different temperatures.

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Authors and Affiliations

  1. Department of Engineering Materials, Luleå University of Technology, S 97187, Luleå, Sweden

    L. Y. Wei

  2. CRC for Alloy and Solidification Technology (CAST), Department of Mining and Metallurgical Engineering, The University of Queensland, 4072, Queensland, Australia

    G. L. Dunlop

  3. Norsk Hydro a. s., Research Centre Porsgrunn, P.O. Box 2560, N-3901, Porsgrunn, Norway

    H. Westengen

Authors
  1. L. Y. Wei
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  2. G. L. Dunlop
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  3. H. Westengen
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Wei, L.Y., Dunlop, G.L. & Westengen, H. Age hardening and precipitation in a cast magnesium-rare-earth alloy. J Mater Sci 31, 387–397 (1996). https://doi.org/10.1007/BF01139156

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  • DOI: https://doi.org/10.1007/BF01139156

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