Introducing Technique of Elastic Coefficients of Inconel 625 parts Produced by Additive Manufacturing Method via Ultrasonic Testing

Nature of additive manufacturing processes dictate direction-related properties to the final parts and this degree of anisotropy is highly dependenton the process parameters and machine setup, Consequently, the formed properties in such materials should be known in any direction and in any aspect related to the origins assumed initially. There are several methods including destructive and non-destructive techniques for specifying mechanical properties in parts. Using ultrasonic testing, as a nondestructive method, in order to determine elastic constants for rocks, woods, composite and wrought materials, represent its reliability and validity, as well as its repeatability and non-destructivity through years. In this paper, 9 independent elastic constant for orthotropic additively manufactured direct metal laser sintering (DMLS) parts are determined from longitudinal and transverse ultrasound velocities via contact ultrasonic testing for different manufacturing process parameters. This work also carried out comparisons between mechanical properties of as-built parts in three principle directions, as well as ultrasound wave velocities.