Paper Title:
Pre-Aging and Maturing Effects on the Precipitation Hardening of an Al-Mg-Si Alloy
  Abstract

The effect of pre-aging and maturing at room temperature on the hardening response of an Al-Mg-Si alloy is investigated using differential scanning calorimetry (DSC), hardness measurements (Hv) and scanning electron microscopy (SEM).Two experimental conditions are examined. First, natural aging for different times (3 weeks and 1 month) followed by artificial aging at 180°C as a function of time. Second, pre-aging at temperatures in the range 75-100°C followed by artificial aging at 180°C after natural aging for the same periods. The present results indicate that the effect of the pre-aging just after the heating and quenching is used in order to correct the undesirable effect of aging at room temperature. However, during the artificial aging, the alloy hardening becomes faster. Aged samples which have already undergone pre-aging and maturing reveal the precipitation of ''phase. This later phase has the highest hardness value.

  Info
Periodical
Defect and Diffusion Forum (Volumes 297-301)
Edited by
Andreas Öchsner, Graeme E. Murch, Ali Shokuhfar and João M.P.Q. Delgado
Pages
68-73
DOI
10.4028/www.scientific.net/DDF.297-301.68
Citation
T. Abid, A. Boubertakh, S. Hamamda, "Pre-Aging and Maturing Effects on the Precipitation Hardening of an Al-Mg-Si Alloy", Defect and Diffusion Forum, Vols. 297-301, pp. 68-73, 2010
Online since
April 2010
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$32.00
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