Fatigue crack propagation rate measuring device for metal materials

摘要

An apparatus for measuring the fatigue crack growth rate of a metal material is disclosed. An apparatus for measuring the fatigue crack propagation rate of a metal material is provided for measuring a fatigue crack growth rate of a metal material and is provided with a heating means for heating the metal material to a predetermined temperature, A load imparting means for applying a predetermined repetitive stress to a crack-forming portion of the metal material so that cracks formed on the metal material are advanced, and a magnitude of cracks formed on the metal material by an eddy current inspection, And a coil wound around an iron core provided in the hollow of the case to form a magnetic field at a cracked portion of the metallic material and a driving portion for moving the measuring portion in a predetermined direction with respect to the metallic material Measuring means are included.