Barely Significant

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Dislocations inside the material undergo rearrangement and annihilation driven by the impact energy; meanwhile, microstructural adjustments such as dynamic recovery and grain boundary migration make the intragranular orientation tend to be uniform, leading to a decreasing trend in the average Kernel Average Misorientation (KAM) values of both the BM and WJ. Σ3 coherent grain boundaries are special grain boundaries with low interfacial energy and high stability 22 , and their proportions show opposite evolutionary trends in the BM and WJ: the proportion of Σ3 grain boundaries decreases in the BM but increases in the WJ.
18 investigated the effect of FPC on the frost-heaving resistance of coarse-grained soil and found that the FHD of soil shows an increasing trend with the increase of FPC when FPC is lower than 25%.From the above research results, it can be seen that the FPC in the soil is the main factor affecting its FHC 19 , 20 , the frost-heaving sensitivity of soil increases with the increase of FPC.