Alloy having fine-scale eutectic, in particular nanoeutectic, structure and production of such an alloy

Abstract

The invention relates to an alloy, in particular a light metal alloy, having an alloy composition with at least three components and a eutectic structure that is obtained by cooling the alloy from a liquid state to a solid state, under the condition that a composition of the alloy lies in a field around a pseudoeutectic point (pE) of a phase diagram of the alloy, so that at least 85 mol % eutectic structure is present in the alloy. The alloy also relates to a method for producing an alloy of this type.

1 . An alloy, in particular a light metal alloy, having an alloy composition with at least three components and a eutectic structure that is obtained by cooling the alloy from a liquid state to a solid state, under the condition that a composition of the alloy lies in a field around a pseudoeutectic point (pE) of a phase diagram of the alloy, so that at least 85 mol % eutectic structure is present in the alloy. 
     
     
         2 . The alloy according to  claim 1 , wherein the eutectic structure has an average spacing of the phase amounts thereof of less than 3 μm, preferably less than 1 μm. 
     
     
         3 . The alloy according to  claim 1 , wherein the alloy comprises a residual solidification at an amount of maximally 5 mol %, preferably maximally 3 mol %. 
     
     
         4 . The alloy according to  claim 1 , wherein the alloy comprises a primary solidification at an amount less than 10 mol %, in particular less than 5 mol %. 
     
     
         5 . The alloy according to  claim 4 , wherein the primary solidification is formed having a mixed crystal phase. 
     
     
         6 . The alloy according to  claim 1 , wherein the alloy has a density less than 8 g/cm 3 . 
     
     
         7 . The alloy according to  claim 1 , wherein the alloy is a magnesium-based alloy, aluminum-based alloy, lithium-based alloy, or titanium-based alloy. 
     
     
         8 . (canceled) 
     
     
         9 . The alloy according to  claim 1 , wherein the alloy is an Al—Mg—Si alloy. 
     
     
         10 . The alloy according to  claim 9 , wherein the Al—Mg—Si alloy comprises between 0.01 wt % and 5.0 wt %, in particular approximately 3.0 wt %, zinc. 
     
     
         11 . A method for producing an alloy, in particular an alloy according to  claim 1 , having a eutectic structure, wherein the alloy has an alloy composition with at least three components and wherein the alloy is cooled, starting from a liquid state, to a solid state of the alloy in order to form the eutectic structure, under the condition that the alloy composition is provided such that it lies in a field around a pseudoeutectic point (pE) of a phase diagram of the alloy, so that the eutectic structure is embodied at an amount of at least 85 mol % during the cooling to the solid phase. 
     
     
         12 . A feedstock, semi-finished product, or construction material having an alloy according to  claim 1 . 
     
     
         13 . A feedstock, semi-finished product, or construction material obtainable using the method according to  claim 11 .