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 important role of dissolved elements, such as manganese or iron, in the production process ofrolled material was in the focus of this investigation.In the AlMn-alloys the content of manganese in solid solution is first controlled by other alloyingelements such as silicon and iron. The addition of silicon or / and iron reduces the level ofmanganese in solid solution in the as-cast condition as well as in the following preheating processstep. Another major parameter is the final annealing treatment of the rolled products. Thepreheating treatment and the final annealing are the key parameters to control the level ofmanganese in solid solution and the size and distribution of the fine dispersoids.In the AlFe-series alloys the iron content in solid solution is first controlled by the casting processDC or CC and the amount of iron in the alloy composition. In the as-cast condition the dissolvediron level is normally higher in the CC-material than in the DC-material. The intermediateannealing treatment also has a great influence on the content of iron in solid solution.They recovery and recrystallisation behaviour is controlled by the content of manganese or iron insolid solution. The precipitation of manganese or iron during thermal treatment leads to optimumdislocation pinning and results in a high thermal stability. On the other hand, if the precipitation ofmanganese or iron interacts with the occurence of recrystallisation, the resulting grain structure canshow coarse grain
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/13/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.519-521.1447.pdf
