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Structure and mechanical properties of Al—Fe—Cr alloys for elevated temperatures, reinforced by nanoquasicrystalline particles additionally alloyed by Ti, Mo and Nb

N.Danilenko,
 
† Y.Milman,
 
N.Zakharova,
 
M.Yefimov,
 
A.Sharovskiy,
 
A.Samelyuk,
 
V.Goncharuk,
 
O.Neikov
 

I. M. Frantsevich Institute for Problems of Materials Science of the NAS of Ukraine, Omeliana Pritsaka str.,3, Kyiv, 03142, Ukraine
Electron Microscopy and Strength of Materials - Kiev: Frantsevich Institute for Problems of Materials Science NASU, 2014, #20
http://www.materials.kiev.ua/article/1716

Abstract

The effect of additional alloying by Ti, Nb and Mo to the increase of operating temperature of nanostructured Al—Fe—Cr alloys with aluminum matrix reinforced by quasicrystalline particles were studied . Rods from investigated alloy with a diameter of 6 mm were obtained by extrusion of water-atomized powders without sintering. Due to designed regimes, the two-phase structure of powders (aluminum matrix reinforced by nanoquasicrystalline particles) was obtained in all studied compositions. All investigated alloys exhibit the high thermal stability. Alloy Al94Fe2,5Cr2,5Mo0,5Ti0,5 is the most stable at the level of hardness during the annealing at 400 °С. The highest level of strength at 400 °С show the alloys additionally alloyed by Nb. Full text download


ALUMINUM ALLOYS, NANOQUASICRYSTALS, PHASE COMPOSITION, PLASTICITY, STRENGTH, STRUCTURE

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