| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 831507 | Materials & Design (1980-2015) | 2011 | 5 Pages |
The quench sensitivity of 6082 aluminum alloy was investigated by time–temperature–property (TTP) curves. The sensitive temperature of quenching ranges from 250 °C to 440 °C in 6082 Al-alloy, and the nose temperature is about 360 °C. During isothermal treatment process, the Mg2Si particles precipitate from the supersaturated solid solution, and the precipitation rate is the highest at the nose temperature. A number of rod-shaped β′ and β particles precipitate in the early stage of isothermal treatment at 360 °C. Prolonging the holding time leads to more and coarser β particles in the matrix. Both the precipitation of β′ and β particles results in loss of solute and decreasing of the subsequent age hardening effect. Also, the important coefficients k2–k5 and critical cooling rate for 6082 Al-alloy are identified, and the properties after different rates of cooling were predicted using quench factor analysis.
► The TTP and TTT curves of 6082 alloy were obtained. ► The constants k2–k5 and critical temperature region for 6082 alloy were identified. ► Quench sensitivity was analyzed in view of the transformation kinetics. ► Quenching rate should be more than 15 °C/s at the sensitive temperature zone.
