Abstract
In the present study, the damping behavior of bulk Cu–11.9Al–2.5Mn (wt%) was investigated using a multifunction internal friction apparatus through the method of forced vibration over the temperature range from room temperature to 400 °C. Two internal friction peaks are found at around 150 °C and 325 °C during heating. It is suggested that the high-temperature peak originates from the phase transition from martensite to austenite while the low-temperature peak from the pseudo-first-order phase transition associated with the thinning process of the twins. The related mechanisms are also discussed in terms of the interaction between the microstructure defects. (© 2004 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)
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