Amplitude-Dependent Internal Friction in Silicon Bronze at Low Temperatures

Abstract

An internal friction study within the temperature range of 7 to 300 K is carried out at a frequency ≈ 100 kHz within the strain amplitude range of ϵ0 = 10−7 to 2 × 10−4. Commercial BK 31 silicon bronze is tested both after cold-working and after annealing. Cold-working causes an amplitudedependent internal friction at ϵ0 ≧ 10−5. The amplitude-dependent part of the decrement Δh may be approximated by a power function, what is typical for pure single crystals and dilute alloys. The aim of the present study is to demonstrate the validity of such a power function also for rather impure alloys like BK 31 bronze. [Russian Text Ignored].