Affiliation:
1. Central South University
2. Guangdong Xingfa Aluminium Group
Abstract
Grain refinement of 01420 Al-Li alloy through particle stimulated nucleation(PSN) of
recrystallization is reported. The results showed that the rolling in the overaged 01420 Al-Li alloy
resulted in the formation of the deformation zones associated with the second phase particles larger
than 0.80 μm which can act as the nucleation sites for recrystallized grains. The precipitates larger
than 0.80 μm are sticked shaped S-phase(Al2MgLi) and globular β-phase(Mg2Al3), and the density of
β-phase particles is approximately as two to three times as the S-phase particles. The S-phase
particles can’t be as PSN sites since they were broken to small dispersoid particles during rolling. The
average grain size of 01420 Al-Li alloy solutioned at 470°C for 2h, aged at 300 °C for 48h, 81% rolled
at 300 °C and finally recrystallized at 500 °C for 10min is approximately 10 μm.
Publisher
Trans Tech Publications, Ltd.
Subject
Mechanical Engineering,Mechanics of Materials,Condensed Matter Physics,General Materials Science
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