High rate impact resistance, role

The Role of Rubber Modification in Improving High Rate Impact Resistance... 

For many applications the resistance of the material to shock loading is an important property. Here we find ourselves, contrary to the previous section, on the very short side of the time scale. For the impact strength the short-term tensile strength as well as the ultimate strain play a role the impact strength is, in fact, the energy needed for rupture at a high rate of deformation, J impact strength accurately and uniquely. 

The morphology of the oxide scale that forms during erosion plays an important role, as noted by the extensive work of Levy and co-workers [47, 49,53,58,59]. Segmented scales have better erosion resistance than thick, continuous and dense scale, since in the former case the spalled area is confined to crystalline oxide only. This observation is validated by adding Si to the steel. Addition of Si to low chromium steel results in the formation of a segmented scale even at high impact velocity and thereby reduces the erosion rate substantially as compared to the same steel without Si [59]. 

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