Journals Information
Universal Journal of Materials Science Vol. 1(2), pp. 31 - 38
DOI: 10.13189/ujms.2013.010204
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Mechanical Properties of Al-Al4C3 Composite Produced by Mechanical Alloying
Michal Besterci1, Ferdinand Dobe拧2, Bernard Maake S眉lleiov谩1, Oksana Velgosov谩3,*
1 Institute of Materials Research, Slovak Academy of Sciences, Watsonova 47, 043 53 Ko拧ice, Slovak Republic
2 Institute of Physics of Materials of the Academy of Sciences of the Czech Republic , 沤i啪kov谩 22, 616 62 Brno, Czech Republic
3 Technical University in Ko拧ice, Faculty of Metallurgy, Department of Materials Science, Park Komensk茅ho 11, Ko拧ice 04200, Slovak Republic
ABSTRACT
The aim of this paper was to study the influence of different input materials and methods of treatment on the microstructure, mechanical properties and fracture of dispersion strengthened aluminium alloys in the Al-Al4C3 system. It was proved that the transformation efficiency of carbon to Al4C3 by heat treatment of aluminium with the porous furnace black and electrographite is higher than that of the hard cracked graphite. The size of Al4C3 dispersed phase was measured by TEM on thin foil and it was constant and as small as 30 nm. Subgrain size measured in the range of 100 grains in thin foils depended on the carbon type, as well. It ranged from 0.3 to 0.7渭m. The temperature dependence of ductility, and reduction of area in the temperature range of 623 鈥� 723 K and strain rate of 10-1 s-1, indicated a considerable increase of properties. In a case when the volume fraction of Al4C3 changes from lower to higher, the grain rotation mechanism dominates instead of the grain boundary sliding. The dependence of the minimum deflection rate on the applied force as well as the dependence of the time to fracture on the applied force for two temperature levels (623 and 723 K) by small punch testing is depicted. The anisotropy of the creep properties and fracture using small punch tests for the Al-Al4C3 system produced by ECAP were analysed.
KEYWORDS
Aluminium-Graphite Powder System, Mechanical Alloying, Compacting, Microstructure Parameters, Mechanical Properties, Creep Characteristics
Cite This Paper in IEEE or APA Citation Styles
(a). IEEE Format:
[1] Michal Besterci , Ferdinand Dobe拧 , Bernard Maake S眉lleiov谩 , Oksana Velgosov谩 , "Mechanical Properties of Al-Al4C3 Composite Produced by Mechanical Alloying," Universal Journal of Materials Science, Vol. 1, No. 2, pp. 31 - 38, 2013. DOI: 10.13189/ujms.2013.010204.
(b). APA Format:
Michal Besterci , Ferdinand Dobe拧 , Bernard Maake S眉lleiov谩 , Oksana Velgosov谩 (2013). Mechanical Properties of Al-Al4C3 Composite Produced by Mechanical Alloying. Universal Journal of Materials Science, 1(2), 31 - 38. DOI: 10.13189/ujms.2013.010204.