Journal of Materials Science

, Volume 30, Issue 7, pp 1698–1708 | Cite as

Effect of alloying elements and dendrite arm spacing on the microstructure and hardness of an Al-Si-Cu-Mg-Fe-Mn (380) aluminium die-casting alloy

  • A. M. Samuel
  • F. H. Samuel


The microstructure of aluminium alloys based on 380 die-casting alloy was studied in detail, as a function of the alloying elements iron, magnesium, copper and manganese, and the solidification rate. Three methods of solidification were employed to simulate cooling rates obtained from investment, permanent, and die-casting processes, corresponding to ∼ 0.4, ∼ 12 and ∼ 260 °C s−1, respectively, with emphasis on the highest cooling rate. Hardness measurements were carried out on samples obtained from the latter, in the as-cast and T5 tempered conditions (4 h at 25, 155, 180, 200 and 220 °C). The results have been discussed and the correlation between the hardness and microstructure as a function of alloying elements is presented. The effect of solution heat treatment on the variations in the microstructure and hardness has also been discussed.


Copper Microstructure Magnesium Heat Treatment Manganese 
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Copyright information

© Chapman & Hall 1995

Authors and Affiliations

  • A. M. Samuel
    • 1
  • F. H. Samuel
    • 1
  1. 1.Département des Sciences AppliquéesUniversité du Québec à ChicoutimiChicoutimiCanada

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