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Precipitation during homogenization cooling in AlMgSi alloys

2013; Elsevier BV; Volume: 23; Issue: 7 Linguagem: Inglês

10.1016/s1003-6326(13)62672-2

2210-3384

Yücel Birol,

Advanced Welding Techniques Analysis

Precipitation during the industrial cool down takes place predominantly above 300 °C in the EN AW-6082 and 6005 alloys. The phase precipitation throughout cooling is equilibrium β phase. A considerable capacity is retained after the cool down for further precipitation during a subsequent heating cycle. The β-Mg2Si is once again the predominant phase that forms during a scan heating cycle employed in exactly the same manner with the industrial billet preheating operation. The precipitation in the 6060 alloy, on the other hand, occurs predominantly below 300 °C with additionally β′-Mg2Si particles formed below 200 °C.