The Coarsening of Dendrite Arm Spacing during Solidification of Al-Cu-Mn Alloy

Zhi He

doi:10.4028/www.scientific.net/AMR.239-242.2029

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 239-242The Coarsening of Dendrite Arm Spacing during...

The Coarsening of Dendrite Arm Spacing during Solidification of Al-Cu-Mn Alloy

Abstract:

A secondary dendrite arm spacing coarsening model for multi-component alloy is proposed, where the back diffusion flux in solid is simplified by introducing the parameter of solute boundary layer,δi . The simplified model was applied to the predication of the secondary arm spacing of directional solidified Al-Cu-Mn alloy. The good agreement between the experimental results and the calculated lines shows that this simplified model is satisfactory for the prediction of dendrite arm coarsening during solidification in multi-component alloys.