Mecanismo auto cicatrização com ênfase em ligas metálicas

Abstract

The concept of self-healing in metals is nothing more than the closing of a crack generated in service in a material, through external interference or not, so that it can reduce costs with repair and replacement of the material. The mechanism of self-healing is a well-studied concept for engineering materials, but is not yet widely used for metallic materials because these materials require high temperatures for diffusion and thus require a lot of energy for the displacement of atoms to the region where it contains a crack. The phenomenon of self-healing is widely used in polymers, composites and concrete, and several mechanisms of self-healing are possible in these materials. For metals, in the first study conducted at the Massachusetts Institute of Technology (MIT), a crack was observed in a sample of nickel by applying compressive stresses and thermal energy over a nickel alloy. The aim of the study a viable route for the self-healing mechanism for metallic materials with the help of literature and articles in the area in order to consolidate this concept so important for the future of engineering as it will allow applications with greater durability.