US 11,987,864 B2
Magnesium alloy and forged component
Henry Zhan, Shanghai (CN); and Congjie Wang, Shanghai (CN)
Assigned to GM GLOBAL TECHNOLOGY OPERATIONS LLC, Detroit, MI (US)
Filed by GM GLOBAL TECHNOLOGY OPERATIONS LLC, Detroit, MI (US)
Filed on Jan. 17, 2022, as Appl. No. 17/577,199.
Claims priority of application No. 202110171202.2 (CN), filed on Feb. 8, 2021.
Prior Publication US 2022/0251689 A1, Aug. 11, 2022
Int. Cl. C22C 23/02 (2006.01)
CPC C22C 23/02 (2013.01) 10 Claims
OG exemplary drawing
 
1. A forged magnesium component comprising:
an alloy matrix comprising,
aluminum (Al) at a concentration of greater than or equal to about 0.5 wt. % to less than or equal to about 2.5 wt. %,
manganese (Mn) at a concentration of greater than or equal to about 0.3 wt. % to less than or equal to about 1.0 wt. %, the concentration of manganese is greater than or equal to a value of [Mn] determined by a linear function [Mn]=x[Al], where x has a value such that x is at least 0.6 when [Al]=0.5 and is at least 0.14 when [Al]=2.5,
zinc (Zn) at a concentration of greater than or equal to about 0 wt. % to less than or equal to about 3 wt. %,
tin (Sn) at a concentration of greater than or equal to about 0 wt. % to less than or equal to about 3 wt. %,
calcium (Ca) at a concentration of greater than or equal to about 0 wt. % to less than 0.175 wt. %,
rare earth metals at a concentration of greater than or equal to about 0 wt. % to less than or equal to about 5 wt. %, the rare earth metals being one or more of an element of the lanthanide series, scandium (Sc), Yttrium (Y), or a combination thereof, and
a balance of the alloy composition being magnesium (Mg);
the alloy matrix including a microstructure including partially dynamically recrystallized grains, an average grain size of the dynamically recrystallized grains being less than or equal to 10 μm, and
Al—Mn dispersoids dispersed in the microstructure.