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Ballistic performance of nanocrystalline and nanotwinned ultrafine crystal steel

This paper studies the ballistic behavior of nanocrystalline and ultrafine nanotwinned crystals. This work thoroughly evaluates the ballistic properties of these materials, and propose an optimization based on a hybridization with composite materials. This new material is proven here for the first time to be a potential candidate for personal protection where a low deformation is of drastic importance (e.g. a helmet). This work is the basis of a new collaboration between Oxford, MIT, University Polytechnic of Madrid and City University of Hong-Kong and is under consideration for military funding.