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:
The microstructural evolution during thermal annealing of a cryogenic rolled 5052 Al alloywas investigated. The activation energy for annealing behavior was calculated using DSC data. Forthe heating rate of 16℃/min, the precipitation occurred at the annealing temperature of 150~230℃due to Mg self diffusion, recovery occurred at the annealing temperature of 230~260℃, andrecrystallization proceeded at a higher temperature up to about 370℃. Both recovery andrecrystallization gave rise to non-uniform, bimodal grain-size distributions, which may result fromheterogeneous nanostructures. In addition, the activation energy for the precipitation was found as~115kJ/mol, indicating the process was diffusion-controlled (Mg in Al), and the activation energy forrecovery was found to be ~140kJ/mol, representing self-diffusion in pure Al
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/17/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.558-559.735.pdf
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