NONLINEAR FITTING OF THE INTERNAL FRICTION DATA AND ITS APPLICATION ON THE BAMBOO GRAIN BOUNDARY RELAXATION IN PURE Al
内耗数据的非线性拟合及其在纯铝竹节晶界弛豫中的应用

A non-linear fitting program based on Bevington method is designed to fitthe internal friction temperature spectrum. A spectre consisting of utmost six peaks with alognormal distribution in relaxation tabs and an exponential background could be fitted by theprogram. Upon this program, the relaxation paramaters of bamboo grain boundary peak inpure Al are analyzed quantitatively. It shows that the relaxation strength decreases with thedescending of peak temperature.