In order to prepare high quality porous magnesium alloys materials, massive pores must exist in the alloys, the crystal grains of the alloy's skeleton should be refined as well.
The main mechanism of magnesium alloy refinement are dynamic recrystallization and intragranular refinement, when the grain refinement is to a certain extent, the grain will no longer be refined.
镁合金细化机理主要为动态再结晶细化和晶内细化两种机制，当晶粒细化到一定程度，晶粒将不再细化。
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By means of the metallography, the Grain of the magnesium alloy is refined obviously.