Magnesium alloys and methods of making and use thereof

Abstract

Disclosed herein are magnesium alloys and methods of making and use thereof. For example, disclosed herein are magnesium alloys comprising: from 0 to 1.5 wt. % Zn; from 0 to 1.5 wt. % Al; less than 0.2 wt. % Ca; from 0.2 to 0.4 wt. % Ce; from 0.1 to 0.8 wt. % Mn; and the balance comprising Mg. In some examples, the magnesium alloy comprises less than 1 wt. % Zn. In some examples, the magnesium alloy comprises less than 1 wt. % Al. In some examples, the magnesium alloy exhibits substantially no incipient melting when extruded with a ram speed of from 1.00 to 10.00 ipm. In some examples, the magnesium alloy is substantially free of a Mg 2 Ca phase, an AlCaMg phase, an Al 2 Ca phase, a Ca 2 Mg 6 Zn 3 phase, or a combination thereof. In some examples, the magnesium alloy is substantially free of a Mg 2 Ca phase.

What is claimed is: 
     
         1 . A magnesium alloy comprising:
 from 0 to 1.5 wt. % Zn,   from 0 to 1.5 wt. % Al,   less than 0.2 wt. % Ca,   from 0.2 to 0.4 wt. % Ce,   from 0.1 to 0.8 wt. % Mn, and   the balance comprising Mg.   
     
     
         2 . The magnesium alloy of  claim 1 , wherein the magnesium alloy comprises less than 1 wt. % Zn. 
     
     
         3 . The magnesium alloy of  claim 1 , wherein the magnesium alloy comprises less than 1 wt. % Al. 
     
     
         4 . The magnesium alloy of  claim 1 , wherein the magnesium alloy comprises from 0 to 0.15 wt. % Ca. 
     
     
         5 . The magnesium alloy of  claim 1 , wherein the magnesium alloy comprises from 0 to 0.1 wt. % Ca. 
     
     
         6 . The magnesium alloy of  claim 1 , wherein the magnesium alloy is substantially free of Ca. 
     
     
         7 . The magnesium alloy of  claim 1 , wherein the magnesium alloy comprises less than 1 wt. % Zn, less than 1 wt. % Al, less than 0.2 wt. % Ca, 0.2 wt. % Ce, 0.4 wt. % Mn, and the balance comprising Mg. 
     
     
         8 . The magnesium alloy of  claim 1 , wherein the magnesium alloy comprises less than 1 wt. % Zn, less than 1 wt. % Al, from 0 to 0.15 wt. % Ca, 0.2 wt. % Ce, 0.4 wt. % Mn, and the balance comprising Mg. 
     
     
         9 . The magnesium alloy of  claim 1 , wherein the magnesium alloy comprises less than 1 wt. % Zn, less than 1 wt. % Al, from 0 to 0.1 wt. % Ca, 0.2 wt. % Ce, 0.4 wt. % Mn, and the balance comprising Mg. 
     
     
         10 . The magnesium alloy of  claim 1 , wherein the Zn, Al, Ca, Ce, and Mn, when present, are substantially dissolved in the magnesium alloy. 
     
     
         11 . The magnesium alloy of  claim 1 , wherein the magnesium alloy is microalloyed. 
     
     
         12 . The magnesium alloy of  claim 1 , wherein the magnesium alloy has a yield strength of 20 ksi or more. 
     
     
         13 . The magnesium alloy of  claim 1 , wherein the magnesium alloy has an ultimate tensile strength of 20 ksi or more. 
     
     
         14 . The magnesium alloy of  claim 1 , wherein the magnesium alloy has an elongation to failure of 10% or more. 
     
     
         15 . The magnesium alloy of  claim 1 , wherein the magnesium alloy is formable at room temperature. 
     
     
         16 . The magnesium alloy of  claim 1 , wherein the magnesium alloy has a solidus temperature of from 500° C. to 625° C. 
     
     
         17 . The magnesium alloy of  claim 1 , wherein the magnesium alloy is substantially free of a Mg 2 Ca phase, an AlCaMg phase, an Al 2 Ca phase, a Ca 2 Mg 6 Zn 3  phase, or a combination thereof. 
     
     
         18 . An object comprising the magnesium alloy of  claim 1 . 
     
     
         19 . A method of use of the magnesium alloy of  claim 1 , the method comprising using the magnesium alloy in an automotive, aerospace, or electronic application. 
     
     
         20 . A method of making a magnesium alloy based object comprising the magnesium alloy of  claim 1 , the method comprising:
 heating an object comprising a preliminary magnesium alloy at a first temperature for a first amount of time;   wherein the preliminary magnesium alloy comprises a first intermetallic phase having a first melting temperature and an alloy phase having a solidus temperature;   wherein the melting temperature of the first intermetallic phase is lower than the solidus temperature of the alloy phase; and   wherein the first temperature is above the melting temperature of the first intermetallic phase and below the solidus temperature of the alloy phase;   thereby substantially dissolving the first intermetallic phase into the alloy phase.