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- W327169985 abstract "The mechanical behavior of single-phase polycrystalline materials depend on the elastic constants of individual grains. Most engineering metals are polycrystalline aggregates possess macroscopic texture resulting from preferential grain orientations. Accurate knowledge of texture is important for a number of engineering applications. For example, it plays an important role in determining their subsequent formability into finished parts of complex shape by deep drawing. Textural information can also be exploited to assess plastic damage in a component due to fatigue or external impact. Current ultrasonic methods are based on the relationship between ultrasonic phase velocities and the low-order orientation distribution coefficients (ODCs); a consequence of the application of Voigt averaging method to infer aggregate elastic properties. Thus, such techniques provide only a partial description of texture. It is well-known from the scattering theories that while phase velocity of acoustic waves is controlled primarily by averages of single grain elastic constant fluctuations, redirection of their energy by scattering at the grain boundaries are controlled primarily by two-point averages of these fluctuations. Since these two-point averages depend on higher order ODCs, a more complete and accurate description of texture can be obtained from the measurement of scattered acoustic energy. In this paper, however, wemore » will present a methodology to determine the three low-order ODCs from L-wave and two S-waves propagating only in the normal direction in steel with rolling symmetry. This methodology appears more attractive than that using ultrasonic phase velocities since that requires measurements in three mutually orthogonal directions. In particular, in cases where wave characteristics measurements can be made only in one direction, only the proposed method will be able to yield the lowest three ODCs.« less" @default.
- W327169985 created "2016-06-24" @default.
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- W327169985 date "2006-01-01" @default.
- W327169985 modified "2023-09-23" @default.
- W327169985 title "Using Scattering Theory to Determine Orientation Distribution Coefficients of Polycrystals with Preferred Grain Orientations" @default.
- W327169985 hasPublicationYear "2006" @default.
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