Development of a magnesium secondary alloy system for mixed magnesium post-consumer scrap

Research output: Journal contributionsJournal articlesResearchpeer-review


  • Daniel Fechner
  • Carsten Blawert
  • Norbert Hort
  • Hajo Dieringa
  • Karl Ulrich Kainer

Six alloys were prepared by high pressure die casting in order to develop a magnesium secondary alloy system for mixed post-consumer scrap. The alloys were investigated with regard to intermetallic phases, grain structures, mechanical properties and performance in the salt spray test. The results are discussed in relation to the characteristics of the high pressure die casting process. The effect of contamination by copper and compensation for this effect by the addition of zinc were thoroughly investigated for the most promising alloy. It is evident that the alloying elements strontium, silicon and calcium are incorporated in the ternary Zintl phase Sr6.33Mg16.67Si13, while aluminium, zinc, copper and magnesium form the tau-phases Mg32(Alx,Cu1−x)49 and Mg32(Al,Zn)49. The two tau-phases can merge due to isomorphism. Mg32(Al,Zn)49 ensures improved corrosion resistance after the addition of copper.

Original languageEnglish
JournalMaterials Science and Engineering A
Pages (from-to)222-230
Number of pages9
Publication statusPublished - 01.08.2013
Externally publishedYes

    Research areas

  • Corrosion, HPDC, Intermetallics, Magnesium alloys, Mechanical characterization, Secondary alloy
  • Engineering