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Temperature dependent measurement of internal damping of austenitic stainless steels
Summary
This paper measured internal damping of austenitic stainless steels (AISI 304, 316L, and 316Ti) as a function of temperature using resonance methods, finding that microplastic processes and energy dissipation are closely tied to defect content. The measurements were used to characterize elastic properties, stress relaxation behavior, and the effects of second-phase particles and voids.
This article is aimed on the analysis of the internal damping changes of austenitic stainless steels AISI 304, AISI 316L and AISI 316Ti depending from temperature. In experimental measurements only resonance method was used which is based on continuous excitation of oscillations of the specimens and the whole apparatus vibrates at the frequency near to the resonance. Microplastic processes and dissipation of energy within the metals are evaluated and investigated by internal damping measurements. Damping capacity of materials is closely tied to the presence of defects including second phase particles and voids. By measuring the energy dissipation in the material, we can determine the elastic characteristics, Youngs modulus, the level of stress relaxation and many other.