Influence of Precipitates on the Serrated Yielding in AI-Cu-Mg Alloy and Microscopic Experiment Investigation
沉淀对A1-Cu—Mg合金中锯齿形屈服现象影响及其微观实验研究

Solution-treated A1-Cu-Mg alloys exhibit prominent plastic deformation localization, i. e. serrated yielding. The characteristics of serrated yielding change with solution treatment temperatures. The plastic deformation behaviour of alloys is closely related to microstructure, especially the kinetics of dislocation motion. In this pal3er the microstructure of A1-Cu-Mg alloys solution-treated at different temperatures was investigated by transmission electron microscope, and the size and volume content of precipitate particles were registered. The mechanism of dynamic strain aging in A1-Cu-Mg alloys is analyzed based on the macroscopic and microscopic experimental results.