Abstract:In many cases, due to high surface stress, stress concentration and wear, the metal material starts to fail from the surface. It is necessary to investigate interface evolution characteristics under high‐speed collisions for widely used metal materials. The microstructures and strengthening mechanism of the Ni balls after high‐speed collisions with 316 L stainless steel were investigated by a self‐designed high‐speed collisions test system. It was found that ultrafine twins and α'‐martensite were formed in 316… Show more
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