Effect of Cu/Ag Addition on Age-Precipitation in Two Step Aged Al-Mg-Si Alloys

Y. Oe; K. Matsuda; J. Nakamura; S. Ikeno

doi:10.4028/www.scientific.net/AMR.922.560

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 922Effect of Cu/Ag Addition on Age-Precipitation in...

Effect of Cu/Ag Addition on Age-Precipitation in Two Step Aged Al-Mg-Si Alloys

Abstract:

The effect of Cu or Ag addition on 2 step aging in Al-Mg-Si alloy has been investigated to understand precipitation for this alloy. The maximum hardness of two step aged alloy was higher with increasing pre-aging time for Al-Mg-Si alloy. There was no remarkable difference between the peak-hardness of the Ag addition alloy with and without pre-aging. The hardness decreased once for the Ag addition alloy aged at 473K just after pre-aged at 343K for 600ks and then increased to the peak hardness with increasing aging time, which means the reversion of the Ag addition alloy.