AW 6060 Alloy

Alloy name: AW 6060
Diagram No.: 787
Type of diagram: TTP
Chemical composition in atomic %: 0.65% Mg, 0.52% Si, 0.11% Fe, balance is Al
Alloy group: Aluminium-based alloys
Note: Isothermal TTP diagram. Time–temperature–precipitation (TTP) characteristic for the formation of Beta''- and Beta'-precipitates in AW 6060. Filled symbols refer to data directly taken from Delta L/L-curves (maxima: Beta''; mimina: Beta'; see text); crossed symbols denote the values deduced from the fit with two rates k(1,2). The dotted lines show the threshold values for reaching 60% of the maximum concentration of Beta'' and Beta'. The numbered data points (empty symbols) refer to data taken from literature.
For each measurement run, a solution annealing was performed inside the dilatometer at 540 C for 30 min with then subsequent quenching in a helium gas stream, then holding at 32 C for 4 min, and a final fast heat-up (100 .C/min) to temperatures between 170 C and 260 C for the isothermal precipitation treatment. Unless otherwise stated the difference between the sample’s length right after the heating step to aging temperatures and its actual length standardized to the its length at room temperature is termed as DL=L. Prior to the whole experiment series, the sample was annealed at 540 C for 24 h to obtain a fully recrystallized microstructure.
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