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:
Twin-roll casting (TRC) is an advantageous substitution for Direct-Chill (DC) casting inthe manufacturing of rolled aluminium products. The results of a study of the phase transformationsand their interaction with recrystallization occurring during the annealing of TRC Al-Mn based alloysare reported. Four alloys with different contents of Mn, Si and Fe were investigated. Precipitation wasstudied by resistometric measurements in the course of a heating at linear rate. The microstructuralprocesses responsible for the observed changes in resistivity were identified by TEM examinations ofquenched specimens. The changes in the microstructure and solute content during homogenisations at450°C and 610°C were monitored by conductivity and hardness measurements and polarised lightmicroscopy. It was elucidated that the temperature and kinetics of phase transformations areinfluenced not only by the content of Mn, but also by Si content. In alloys with low Si content, thedecomposition of solid solution and the transformation of primary phases occur in much largertemperature range than in the alloys with high Si content. The precipitation of Mn and Si, concurrentto recrystallization, was observed to retard the latter, especially in alloys with high Mn and Si content
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/13/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.519-521.365.pdf
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