![]() ![]() ![]() The application of these so called ‘self-healing’ materials has the potential to drastically increase the durability and reliability of structural components. In recent years, new types of engineering materials have been developed that can repair internal crack and creep damage autonomously using healing mechanisms based on the physico-chemical nature of the material 1. Our results demonstrate that healed cracks can have sufficient mechanical integrity to make subsequent cracks form elsewhere upon reloading after healing. For the first time, the rate and position dependence of crack repair in pristine Ti 2AlC material and in previously healed cracks has been quantified. Coupling a specialized thermomechanical setup to a synchrotron X-ray tomographic microscopy endstation at the TOMCAT beamline, we captured the temporal evolution of local crack opening and healing during multiple cracking and autonomous repair cycles at a temperature of 1500 K. An attractive feature of this material is its capacity for the autonomous healing of cracks when operating at high temperatures. The Ti 2AlC MAX phase possesses attractive thermomechanical properties even beyond a temperature of 1000 K. MAX phase materials are emerging as attractive engineering materials in applications where the material is exposed to severe thermal and mechanical conditions in an oxidative environment. ![]()
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