Internal Friction in Sintered Iron Product

Internal Friction and Elastic Constants of Sintered Titanium

Using aMarx-oscillator standing-wave resonancemethod, we measuredthe internal friction &' of sintered titanium containing up to 26 volume-percent voids (c). The surprising &I-versus-c curve shape, an exponential increase, lead us to remeasure &I-versus-c by acoustic-resonance spectroscopy, which gave similar results. We hypothesized that both void shape and void size change with c. For the void...

Internal Friction Characteristics of Interstitial Carbon and Nitrogen in -iron

Internal friction in enzyme reactions.

The empirical concept of internal friction was introduced 20 years ago. This review summarizes the results of experimental and theoretical studies that help to uncover the nature of internal friction. After the history of the concept, we describe the experimental challenges in measuring and interpreting internal friction based on the viscosity dependence of enzyme reactions. We also present spe...

Internal Friction in Concentrated Alloys

Internal friction in concentrated alloys at kHz frequencies and at temperatures from 120 3 0 0 K has been studied in alpha-and beta-brasses as a function of grain size, temperature and pre-strain, and a statistical model has been proposed to account for the observations.

Internal Friction in Irradiated Polymethylmethacrylate

Some results of the influence of y radiation on the mechanical properties of PoIymethylmethacrylate are presented. Doses of 0, 50, 100, 150 and 200 kGy were employed. The internal friction (loss tangent) and storage shear modulus were measured at temperatures between 173 K and 300 K using a damped torsion pendulum. Compressive tests were made at room temperature with strain rates between 1 . 4 ...