Autors: Dzhudzhev, B. P., Velev B.
Title: INVESTIGATION OF METALLIC MATERIALS WITH ULTRASONIC METHODS
Keywords: ultrasonic, non-destructive information, metallic materials

Abstract: The paper presents two non-destructive methods for ultrasonic examination of metallic materials. The structure and strength characteristics of samples and castings of cast iron, steel and aluminum alloys were studied with the methods for measuring the information non-destructive parameters -speed and attenuation coefficient of ultrasound in the studied materials. These non-destructive information parameters provide information from the volumetric ultrasonic waves passing through the entire cross section of the material. The velocities and the attenuation coefficient of the ultrasound were calculated and a correlation of these parameters with the tensile strength in responsible castings of gray and high-strength cast irons, as well as a correlation of the hardness in tool steel samples was established. The elastic characteristics are also determined - the modulus of elasticity E (Jung's modulus) and the modulus of angular deformation (torsion) G in aluminum castings and their dependenc

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    , 2021, Bulgaria,

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    Вид: пленарен доклад в международен форум, публикация в реферирано издание