Influence of Mg2 Si particles in form of uniform and random distribution mode on stress field in magnesium matrix was simulated by ANSYS software.The simulated results show that with a smaller particle distance and even less than effective interference distance

interference effects among the particles will take stress concentration among neighbor particles.Angle among the particles can directly affect the interaction among particles.When the particles spacing is less than the effective interference with central connection between the particles parallel to load direction

maximum stress concentration can be observed.At the same conditions

the mechanical properties of in situ Mg2 Si particles with uniform distribution is superior to those of ones with random distribution.