非线性滞弹性内耗的实验和理论研究

EXPERIMENTAL AND THEORETICAL STUDY ON NON-LINEAR ANELASTIC INTERNAL FRICTION

本文评述了非线性滞弹性内耗研究的新近发展非线性滞弹性内耗与线性滞弹性内耗的主要区别是它不但呈现频率内耗峰和温度内耗峰，还在出现温度内耗峰的温度范围内出现振幅内耗峰自1950年首次发现非线性滞弹性内耗现象以来，截至目前，已经发现了两种呈现非线性滞弹性内耗的体系：（1）点缺陷（空位与溶质原子）与位错的交互作用，在这方面已有了丰富的实验结果，提出了有关的物理模型，也进行了一些理论研究工作（2）位错与晶界（竹节晶界和双晶晶界）的交互作用，在这方面已得到了一些实验结果。

A critical review is made on the recent development of the research on non-linear anelastic internal friction. The chief difference between the non-linear anelastic internal friction and its linear counter part is that in the linear case only internal friction peaks versus temperature and versus frequency appear, whereas in the non-linear case appears also internal friction peak versus strain amplitude within the temperature region of the internal friction peak versus temperature,Since the discovery of the non-linear anelastic internal friction in 1950, two systems exhibitiing non-linear anelastic internal frictions have been found and investigated: (1) The interacti0n between point defects (vacancies and solute atoms) and dislocations. A series of experimental results have been obtained concerning this subject, appropriate physical models have been suggested and priliminary theoretical analysis have been attached. (2) The interaction between dislocation and grain boundaries (bamboo grain boundary and bicrystals). Some experimental results have been obtained concerening which further experimental and theoretical studies are requird.