一、引言金属和合金的蠕变通常可以分成减速期、恒速期和加速期三个阶段.为了阐明蠕变的机构,历来已进行了大量的内在结构变化的探讨工作.不过以往的研究大多利用X射线和金相的工具.近年来Одинг等通过对蠕变各阶段静态金相和各种物理量(如硬度、电阻、弹性模量和内耗)变化的观测来探索蠕变各阶段的结构变化.Brook和Sully曾测 I. INTRODUCTION The creep of metals and alloys can usually be divided into three phases of deceleration, constant speed and acceleration. In order to clarify the mechanism of creep, a large number of intrinsic structural changes have been explored. However, most of the previous studies Utilizing X-ray and metallographic tools In recent years, Одинг et al explored the structural changes at various stages of creep through the observation of static metallurgical and various physical quantities (such as hardness, electrical resistance, elastic modulus and internal friction) during creep stages Brook and Sully have tested