论文部分内容阅读
内耗实验发现晶界滞弹性弛豫峰,是上世纪内耗研究的重要进展之一,但是晶界弛豫的微观机制仍然不清楚.通过弹性应力引起溶质晶界偏聚或贫化实验,提出晶界滞弹性弛豫的微观机制是:弹性张应力引起晶界吸收空位,压应力引起晶界发射空位,并引起溶质的晶界偏聚或贫化.建立了晶界滞弹性弛豫平衡下的晶界结构方程和成分方程,以此为基础,建立了弛豫过程的晶界偏聚或贫化的动力学方程.
However, the microscopic mechanism of the grain boundary relaxation is still not clear.According to the experimental results of segregation or depletion of the solute grain boundary caused by the elastic stress, the crystal structure of the crystal The microscopic mechanism of the boundary elastic relaxation is that the elastic tensile stress causes the grain boundary to absorb the vacancies and the compressive stress causes the grain boundary to emit vacancies and cause segregation or depletion of the solute grain boundaries. Grain boundary structure equation and composition equation, based on which, the kinetic equation of segregation or depletion of grain boundary in the relaxation process is established.