Feasibility Diagrams for post-manufacture NDE assessment of gradient materials

This talk will build upon the concept of feasibility diagrams, which, in the original sense, are useful tools to understand the interrelationships that exist between the alloy composition and process parameters to predict whether particular compositions are expected to be manufacturable using additive manufacturing techniques. This talk extends the concept by predicting the potential signals that may be interpretable using nondestructive evaluation (NDE) techniques. This talk presents, for the first time, ternary-based feasibility diagrams for advanced non-ferrous structural alloys, including those based upon Ti, Cr, Mo, Fe, Ni, and Cu. The presented feasibility diagrams include those that seek to predict metrics that are relevant to ultrasonic inspection techniques and x-ray radiography. Factors including anisotropy in the elastic properties, their changes as a function of heat-treatment, and the potential attenuation due to grain size differences will be discussed as part of an overall strategy to mature this concept in the future. While the ultimate aim is to develop accurate, physics-based in-situ monitoring techniques/models for manufacture of gradient materials, we will also present concepts related to the potential use of these diagrams for multi-modal inversion techniques of data.