从铝合金的应变时效内耗考察位错与点缺陷的交互作用

INVESTIGATION ON THE INTERACTION OF DI. SLOCATION WITH POINT DEFECTS BY STRAIN AGEING INTERNAL FRIC-. TIONOFALUMINIUM ALLOYS

研究了合金含量、合金元素和形变条件对铝合金应变时效内耗行为的影响．由此描述了点缺陷的分布状态和位错组态；指出了控制应变时效回复过程的因素是溶质原子的动性和溶质原子与位错的作用能。提出了能描述应变时效过程中位错─—点缺陷交互作用的位错弦脱钉和位错气团拖曳共同作用的复合模型，相应的理论处理合理地解释了实验现象。

Studies were made on the influnce of alloying content,alloying elements and deformation conditions on the internal friction behavior during strain ageing of aluminium alloys.Therefrom,a description was made on the distribution of point defects and dislocation configuration. It was pointed out that the factors controlling the recovery process of strain ageing are the mobility of solute atoms and interac- tion energy between dislocations and solute atoms.A complex model including unpi- nning of dislocation string and dislocation-atmosphere dragging was proposed.whichcan describe the interaction between dislocation and point defects in the,process ofstrain ageing.A corresponding theoretical treatment was made to explain the exper- imental phenomena reasonably.