Aluminum Alloy for Additive Technologies

Abstract

The present disclosure relates to metallurgy, more particularly to a composition and a process for producing part blanks and finished parts from aluminum-based alloys including but not limited to using selective laser melting processes. The proposed aluminum-based alloy comprising magnesium, zirconium and scandium for atomization an aluminum powder therefrom and subsequent producing finished parts by additive technologies has a reduced content of scandium and further comprises oxygen and calcium with a limited size of the oxide film and a moister content.

1 . An aluminum-based alloy comprising magnesium, zirconium and scandium for atomization an aluminum powder therefrom and subsequent producing finished parts by additive technologies, characterized in that the aluminum-based alloy has a reduced scandium content and further comprises oxygen and calcium at the following ratio of components (wt.%): 
       
         
           
                 
                 
               
                     
                 
                   magnesium 
                    4.0-6.5; 
                 
                   zirconium 
                    0.5-1.0; 
                 
                   scandium 
                    0.2-0.6; 
                 
                   oxygen 
                   0.001-0.2; 
                 
                   calcium 
                   0.005-0.15; and 
                 
                 
               
                   aluminum and inevitable impurities being remainder components. 
                 
                     
                 
             
                
               
               
                
                
                
                
                
               
            
             
                
                
               
            
           
         
       
     
     
         2 . The aluminum-based alloy of  claim 1 , wherein the aluminum-based alloy comprises a powder having an average particle size ranging from 20 μm to 150 μm. 
     
     
         3 . The aluminum-based alloy of  claim 2 , wherein the powder has a particle size ranging from 20 μm to 63 μm. 
     
     
         4 . The aluminum-based alloy of  claim 2 , wherein the powder comprises a finished part formed by a selective laser melting or electron-beam melting processes. 
     
     
         5 . The aluminum-based alloy of  claim 1 , wherein the aluminum-based alloy comprises a spherical powder. 
     
     
         6 . The aluminum-based alloy of  claim 1 , wherein the aluminum-based alloy has an ultimate tensile strength of at least 450 MPa after annealing. 
     
     
         7 . The aluminum-based alloy of  claim 1 , wherein the aluminum-based alloy has the magnesium content of 6.5 wt. %, the zirconium content of 1.0 wt. %, the scandium content of 0.2 wt. %, the calcium content of 0.01 wt. %, and the oxygen content of 0.01 wt. %. 
     
     
         8 . The aluminum-based alloy of  claim 1 , wherein the aluminum-based alloy is formed from a feedstock of aluminum having a purity of at least 99.5%. 
     
     
         9 . The aluminum-based alloy of  claim 1 , wherein the aluminum-based alloy has the magnesium content of 4.0 wt. %, the zirconium content of 0.5 wt. %, the scandium content of 0.6 wt. %, the calcium content of 0.2 wt. %, and the oxygen content of 0.005 wt. %. 
     
     
         10 . An aluminum-alloy-based powder comprising magnesium, zirconium and scandium for producing part blanks and finished parts by additive technologies, characterized in that the aluminum-based alloy has a reduced scandium content and further comprises oxygen and calcium at the following ratio of components (wt. %): 
       
         
           
                 
                 
               
                     
                 
                   magnesium 
                    4.0-6.5; 
                 
                   zirconium 
                    0.5-1.0; 
                 
                   scandium 
                    0.2-0.6; 
                 
                   oxygen 
                   0.001-0.2; 
                 
                   calcium 
                   0.005-0.15; and 
                 
                 
               
                   aluminum and inevitable impurities being remainder components. 
                 
                     
                 
             
                
               
               
                
                
                
                
                
               
            
             
                
                
               
            
           
         
       
     
     
         11 . The aluminum-alloy-based powder according to  claim 10 , wherein the aluminum-alloy-based powder comprises a spherical shape. 
     
     
         12 . The aluminum-alloy-based powder according to  claim 10 , wherein the aluminum-alloy-based powder has an average particle size ranging from 20 μm to 150 μm. 
     
     
         13 . The aluminum-alloy-based powder according to  claim 10 , wherein the aluminum-alloy-based powder has a particle size ranging from 20 μm to 63 μm. 
     
     
         14 . The aluminum-alloy-based powder according to  claim 10 , wherein the aluminum-alloy-based powder comprises a finished part formed by a selective laser melting or electron-beam melting processes. 
     
     
         15 . The aluminum-alloy-based powder according to  claim 10 , wherein a final part made from the aluminum-alloy based powder has an ultimate tensile strength of at least 450 MPa after annealing. 
     
     
         16 . The aluminum-alloy-based powder according to  claim 10 , wherein the aluminum-alloy-based powder has the magnesium content of 6.5 wt. %, the zirconium content of 1.0 wt. %, the scandium content of 0.2 wt. %, the calcium content of 0.01 wt. %, and the oxygen content of 0.01 wt. %.. 
     
     
         17 . The aluminum-alloy-based powder according to  claim 10 , wherein the aluminum-alloy-based powder is formed from a feedstock of aluminum having a purity of at least 99.5%. 
     
     
         18 . The aluminum-alloy-based powder according to  claim 10 , wherein the aluminum-alloy-based powder has the magnesium content of 4.0 wt. %, the zirconium content of 0.5 wt. %, the scandium content of 0.6 wt. %, the calcium content of 0.2 wt. %, and the oxygen content of 0.005 wt. %.