Al-Zr-Mg Alloy

Alloy name: Al-Zr-Mg
Diagram No.: 50
Type of diagram: TTT
Chemical composition in atomic %: 4.5%Zr, 2.25% Mg, balance is Al
Alloy group: Aluminium-based alloys
Note: Treatment: Solution treated at 490 C (914 F) for 1 h and water quenched. A special DTA (differential thermal analysis) device was used to heat specimens at various rates after they had been aged at room temperature for 1 h. The solid lines are for heating rates from room temperature; the 2 dotted curves are for heating rates that started at -50C (-58 F). Characteristic points on the DTA curves were plotted on the heat rate curves and then connected to represent the lower limit of formation or dissolution of precipitates or phase transformations.
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