Effect of processing on stress-corrosion behavior of die-cast Mg-Al alloy

Ya Unigovski, E. M. Gutman, Z. Koren, H. Rosenson, Y. Hao, T. Chen

Research output: Contribution to journalArticlepeer-review

7 Scopus citations


The effect of processing and microstructure on the stress-corrosion-creep behavior of die-cast rheoformed and conventional AZ91D Mg alloy was studied. Rheoformed alloy has a globular microstructure as compared with a dendritic microstructure of conventional die-cast Mg alloys. The rheoformed die-cast alloy was obtained by stirring the melt during the solidification in a spinning crucible at the casting temperature 580 °C, where the solid fraction amounted to about 40-60%. Due to the difference between the microstructure of Mg alloys produced by the two methods, the corrosion rate of rheoformed AZ91D alloy in the corrosive 0.9% NaCl and in the borate buffer solutions was significantly less than that of a conventional dendritic die-cast alloy. Due to the delay of metal dissolution, creep life of anodized rheoformed alloy in 3% Na2SO4 solution was more than an order of magnitude longer than that of an uncoated alloy.

Original languageEnglish
Pages (from-to)395-399
Number of pages5
JournalJournal of Materials Processing Technology
Issue number1-3
StatePublished - 21 Nov 2008


  • Anodizing
  • Corrosion creep
  • Corrosive solutions
  • Rheoformed Mg alloy

ASJC Scopus subject areas

  • Ceramics and Composites
  • Computer Science Applications
  • Metals and Alloys
  • Industrial and Manufacturing Engineering


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