Methods of forming magnesium-based alloy articles at high strain rates

A method of making a magnesium-based alloy component comprising:

• treating a casting comprising a magnesium-based alloy to a first deforming process having a first maximum predetermined strain rate of greater than or equal to about 0.001/s to less than or equal to about 1/s in an environment having a temperature of greater than or equal to about 250° C. to less than or equal to about 450° C. to form a preform, wherein the magnesium-based alloy has a composition comprising zirconium at greater than or equal to 0 to less than or equal to about 1 wt. %;
• manganese at greater than or equal to about 0.3 wt. % to less than or equal to about 2 wt. %;
• scandium at greater than or equal to 0 to less than or equal to about 15 wt. %;
• a rare earth metal element at greater than or equal to 0 to less than or equal to about 20 wt. %;
• zinc at greater than or equal to 0 to less than or equal to about 6 wt. %;
• aluminum at greater than or equal to 0 to less than or equal to about 3 wt. %;
• and a balance of magnesium;
• and
• subjecting the preform to a second deforming process having a second maximum predetermined strain rate of greater than or equal to about 1/s to less than or equal to about 100/s in an environment having a temperature of greater than or equal to about 150° C. to less than or equal to about 450° C. to form the magnesium-based alloy component substantially free of cracking.