Influence of magnesium on grain refinement and ductility in a dilute Al–Sc alloy

Significance of grain refinement on microstructure and mechanical properties of an Al-3% Mg alloy processed by high-pressure torsion

“…9, a stress exponent of n ≈ 3.0 is calculated for all datum It is important to note that the testing conditions used in this investigation are significantly lower than the normal power-law breakdown which occurs at high stresses at a normalized strain rate of It is worth noting that, although the Al-3% Mg alloy in the present study failed to demonstrate true superplasticity at 673 K due to grain growth, Al-Mg alloys have a significant potential for achieving excellent superplastic ductilities especially when additions such as Sc and/or Zr are introduced to maintain an ultrafine-grained microstructure. For example, Al-3% Mg alloys with additions of Sc [55][56][57][58][59][60][61][62][63][64][65] and both Sc and Zr [64,66,67] demonstrated excellent superplastic elongations of up to >2000% at temperatures in the range of 573-723 K using strain rates of ~10 -4 -1.0 s -1 after processing though ECAP for 6-8 passes.…”

Microstructures and mechanical properties of ultrafine grained 7075 Al alloy processed by ECAP and their evolutions during annealing

“…For Al alloys, most ECAP effort has focused on work strengthening Al-Mg alloys [6][7][8][9]. Little attention has been paid to precipitate strengthening Al-Zn-Mg 7000 series alloys [10,11], which are widely used for high strength structural applications such as aircrafts and sporting goods.…”

Microembossing of ultrafine grained Al: microstructural analysis and finite element modelling

“…A fine grain size is crucial to obtain sharp channel edges [7]. Al alloys with addition of Mg and Cu and containing a large fraction of fine non-shearable particles have a potential to achieve an improved grain refinement during SPD [12,[35][36][37]. For instance, the grain size of Al-2024 (Al-4%Cu-1.5%Mg-0.4%Mn) after eight passes of ECAP can be refined to 0.3 μm [38], which is 30 times smaller than the channel depth used in this work (10 μm).…”