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  4. Modification of magnesium alloys by ceramic particles in gravity die casting
 
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Modification of magnesium alloys by ceramic particles in gravity die casting

Citation Link: https://doi.org/10.15480/882.1552
Publikationstyp
Journal Article
Date Issued
2014-10-30
Sprache
English
Author(s)
Haßlinger, Urs 
Hartig, Christian  
Hort, Norbert  
Günther, Robert  
Institut
Werkstoffphysik und -technologie M-22  
TORE-DOI
10.15480/882.1552
TORE-URI
https://doi.org/10.1155/2014/748595
http://tubdok.tub.tuhh.de/handle/11420/1555
Journal
International journal of metals  
Volume
Volume 2014 (2014)
Start Page
Article ID 748595
Citation
International Journal of Metals, vol. 2014, Article ID 748595, 7 pages, 2014
Publisher DOI
10.1155/2014/748595
Publisher
Hindawi Publishing Corporation
A critical drawback for the application of magnesium wrought alloys is the limited formability of semifinished products that arises from a strong texture formation during thermomechanical treatment. The ability of second phase particles embedded into the metal matrix to alter this texture evolution is of great interest. Therefore, the fabrication of particle modified magnesium alloys (particle content 0.5–1 wt.-%) by gravity die casting has been studied. Five different types of micron sized ceramic powders (AlN, MgB2, MgO, SiC, and ZrB2) have been investigated to identify applicable particles for the modification. Agglomeration of the particles is revealed to be the central problem for the fabrication process. The main factors that influence the agglomerate size are the particle size and the intensity of melt stirring. Concerning handling, chemical stability in the Mg-Al-Zn alloy system, settling and wetting in the melt, and formation of the microstructure in most cases, the investigated powders show satisfying properties. However, SiC is chemically unstable in aluminum containing alloys. The high density of ZrB2 causes large particles to settle subsequent to stirring resulting in an inhomogeneous distribution of the particles over the cast billet.
Subjects
magnesium wrought alloys
gravity die casting
DDC Class
530: Physik
More Funding Information
German Research Foundation (DFG) in
the priority program SPP 1168 “InnoMagTec.”
Lizenz
https://creativecommons.org/licenses/by/3.0/
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