摘要
根据Bevington方法编写了一个可以同时拟合一条由指数型背景和最多6个弛豫时间具有对数正态分布的内耗峰组成的内耗温度曲线的计算机程序．以此方法为基础，定量分析了纯Al竹节晶界内耗峰的弛豫参数，结果表明，峰温从535K降至465K时，弛豫强度约降低10％，模量弛豫的变化约为4％．弛豫强度随着峰温的降低而有所减少.
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.
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
1998年第10期1016-1020,共5页
Acta Metallurgica Sinica
基金
国家自然科学基金!59601008
关键词
内耗
非线性拟合
驰豫强度
铝
晶界弛豫
internal friction, nonlinear fitting, relaxation strength, pure Al, grain boundary relaxation
