AA6063 Alloy

Alloy name: AA6063
Diagram No.: 854
Type of diagram: TTT
Chemical composition in weight %: max. 0.1% Cr, max. 0.1% Cu, max. 0.35% Fe, 0.45-0.9% Mg, max. 0.1% Mn, max. 0.15% Others, 0.2-0.6% Si, max. 0.1% Ti, max. 0.1% Zn, balance is Al
Alloy group: Aluminium-based alloys
Note: Schematic TTT curves for Mg2Si precipitation in AA6063 [redrawn from Sheppard’s diagram [5]. Figure shows a schematic TTT (time-temperature-transformation) diagram indicating the precipitation sequence during cooling of dilute Al-Mg-Si alloys of the AA6063 type, and shows that the Mg2Si precipitate can take two forms, one occurring in an upper temperature range (Beta) and the other in a lower range (Beta’). In contrast, the Beta’ metastable phase, which forms at lower temperature, tends to be bounded by partially coherent interfaces and due to nature of their low mobility, limit the rate of precipitate dissolution.
Reference: Not shown in this demo version.

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