DSC Study on Mg-Si Phases in As Cast AA6xxx

Study of the developed precipitates in Al–0.63Mg–0.37Si–0.5Cu(wt.%) alloy by using DSC and TEM techniques

“…These precipitates might be the initial stage of nucleation of Q precipitates although the corresponding peak was interpreted by Kuijpers et al as ␤ -precipitation for Al-0.76Mg-0.45Si-0.19Fe (wt.%) alloy [19] and by Miao et al for the excess silicon Al-Mg-Si alloys [5]. This nucleation is relatively rapid, as shown by the DSC thermogram, Fig.…”

Influence of heat treatment on the microstructure and mechanical properties of 6005 and 6082 aluminium alloys

“…Transformation of ␤-Al 5 FeSi to ␣ c -Al 12 (FeMn) 3 Si intermetallics is important because it improves the ductility of the material. Dissolution of ␤-Mg 2 Si is also important since it will give maximum age hardening potential for the extruded product [1,3,7]. The precipitation of the metastable precursors of the equilibrium ␤-(Mg 2 Si) phase occurs in one or more sequences, which are quite complex.…”

“…As-cast billets require a homogenization treatment to make the material suitable for hot extrusion. During this homogenization treatment several processes take place such as the transformation of interconnected plate-like ␤-Al 5 FeSi intermetallics into more rounded discrete ␣ c -Al 12 (FeMn) 3 Si particles and the dissolution of ␤-Mg 2 Si particles [7]. Transformation of ␤-Al 5 FeSi to ␣ c -Al 12 (FeMn) 3 Si intermetallics is important because it improves the ductility of the material.…”

Relating Quench Sensitivity to Microstructure in 6000 Series Aluminium Alloys

“…A number of studies e.g. [8][9][10][11] used DSC qualitatively to study various precipitation reactions. Milkereit et al 12) published a detailed report on using DSC to measure the precipitation of Mg-Si-phases during cooling after solution treatment.…”