Lithium free elevated temperature aluminum copper magnesium silver alloy for forged aerospace products

Abstract

A substantially lithium-free alloy may comprise copper from 4.8 wt. % to 5.4 wt. %, magnesium from 0.7 wt. % to 1.1 wt. %, silver from 0.55 wt. % to 0.7 wt. %, and lithium at or below 0.005 wt. %. The substantially lithium-free alloy may further comprise silver from 0.56 wt. % to 0.7 wt. %. The substantially lithium-free alloy may also comprise zirconium from 0.08 wt. % to 0.15 wt. %. The substantially lithium-free alloy may include titanium at or below 0.06 wt. %, iron at or below 0.1 wt. %, silicon at or below 0.08 wt. %, beryllium at or below 0.0001 wt. %, chromium at or below 0.05 wt. %, and zinc at or below 0.25 wt. %.

What is claimed is: 
     
         1 . A substantially lithium-free alloy, comprising:
 copper from 4.8 wt. % to 5.4 wt. %;   magnesium from 0.7 wt. % to 1.1 wt. %;   silver from 0.55 wt. % to 0.7 wt. %; and   lithium at or below 0.005 wt. %.   
     
     
         2 . The substantially lithium-free alloy of  claim 1 , further comprising the silver from 0.56 wt. % to 0.7 wt. %. 
     
     
         3 . The substantially lithium-free alloy of  claim 1 , further comprising zirconium from 0.08 wt. % to 0.15 wt. %. 
     
     
         4 . The substantially lithium-free alloy of  claim 1 , further comprising trace elements, comprising:
 titanium at or below 0.06 wt. %;   iron at or below 0.1 wt. %;   silicon at or below 0.08 wt. %;   beryllium at or below 0.0001 wt. %;   chromium at or below 0.05 wt. %; and   zinc at or below 0.25 wt. %.   
     
     
         5 . The substantially lithium-free alloy of  claim 1 , further comprising the silver from 0.6 wt. % to 0.7 wt. %. 
     
     
         6 . The substantially lithium-free alloy of  claim 1 , further including manganese from 0.45 wt. % to 0.8 wt. %. 
     
     
         7 . The substantially lithium-free alloy of  claim 1 , further comprising the lithium at or below 0.003%. 
     
     
         8 . A worked aircraft component, comprising:
 an alloy comprising:   silver from 0.55 wt. % to 0.7 wt. %; and   lithium at or below 0.005 wt. %.   
     
     
         9 . The worked aircraft component of  claim 8 , further comprising the silver from 0.56 wt. % to 0.7 wt. %. 
     
     
         10 . The worked aircraft component of  claim 8 , wherein the worked aircraft component comprises a wheel. 
     
     
         11 . The worked aircraft component of  claim 8 , wherein the worked aircraft component comprises a piston housing. 
     
     
         12 . The worked aircraft component of  claim 8 , wherein the alloy further comprises:
 titanium at or below 0.06 wt. %;   iron at or below 0.1 wt. %;   silicon at or below 0.08 wt. %;   beryllium at or below 0.0001 wt. %;   chromium at or below 0.05 wt. %; and   zinc at or below 0.25 wt. %.   
     
     
         13 . The worked aircraft component of  claim 9 , wherein the alloy is hardened by a precipitation heat treatment. 
     
     
         14 . The worked aircraft component of  claim 9 , wherein the alloy further comprises:
 copper from 4.8 wt. % to 5.4 wt. %; and   magnesium from 0.7 wt. % to 1.1 wt. %.   
     
     
         15 . The worked aircraft component of  claim 8 , further comprising the silver from 0.6 wt. % to 0.7 wt. %.