抄録
Alloys with a thermoelastic martensitic transformation generally exhibit high mechanical damping in the martensitic phase. Further in this type of alloy a strong internal friction maximum versus temperature is observed during transformation. This maximum is heating rate dependent.
This work is concerned with the decrement measurement in a Cu–Zn–Al alloy at zero heating rate. In this case, and at temperatures below Ms, it has been shown that internal friction decreases with the number of measuring oscillations, and recovers after a few minutes’ rest. The residual internal friction after a large oscillation number does not exhibit any peak at transformation temperature and is stress dependent in the martensitic region. This behavior is qualitatively explained in terms of a very simple model.
