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AlMgSi alloys are commonly used in the automotive industry. In the bake-hardening process of AA6xxx alloys, nanometer-size Mg x Si y Al z -type precipitates play a crucial role. A large number of structures and compositions occur between the initial supersaturated solid solution and the stable Mg 2 Si phase. The transition from pre-β″ to β″ phase marks the transition...
The strength of Al–Mg–Si aluminium alloys depends critically on nanometre-size Mg x Si y Al z -type precipitates that have a face-centered cubic-based structure. In this work, a large number of early structures are investigated by means of first-principles calculations. Both platelet-type and needle-type precipitates are considered. Calculations show that for alloys with an...
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