ISSN:
1662-9752
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Grain refinement of 01420 Al-Li alloy through particle stimulated nucleation(PSN) ofrecrystallization is reported. The results showed that the rolling in the overaged 01420 Al-Li alloyresulted in the formation of the deformation zones associated with the second phase particles largerthan 0.80 μm which can act as the nucleation sites for recrystallized grains. The precipitates largerthan 0.80 μm are sticked shaped S-phase(Al2MgLi) and globular β-phase(Mg2Al3), and the density ofβ-phase particles is approximately as two to three times as the S-phase particles. The S-phaseparticles can’t be as PSN sites since they were broken to small dispersoid particles during rolling. Theaverage grain size of 01420 Al-Li alloy solutioned at 470℃ for 2h, aged at 300 ℃ for 48h, 81% rolledat 300 ℃ and finally recrystallized at 500 ℃ for 10min is approximately 10 μm
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/16/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.546-549.889.pdf
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