Effect of Ternary Trace Additions on the Interfacial Structure and Growth Kinetics of Precipitate Plates in Substitutional Alloys

这项研究是一项利用定量电子显微镜和理论分析来阐明模型合金系统中沉淀形核和长大机制的实验计划。强调了三元加法在影响增长中的作用。对缺陷密度、溶质偏析、台阶生长、析出相形态和间距进行了分析，揭示了三元合金化添加和时效处理中系统变化的影响。用原位高分辨电子显微镜显示了基于位错台阶的原子生长机制，并对相界运动进行了量化。

This research is an experimental program employing quantitative transmission electron microscopy and theoretical analyses to clarify the mechanisms of precipitate nucleation and growth in model alloy systems. The role of ternary additions in affecting growth is emphasized. Defect density, solute segregation, ledge growth, and precipitate morphology and spacing are analyzed to reveal effects of systematic changes in ternary alloying additions and aging treatments. In-situ high resolution electron microscopy is employed to show atomic growth mechanisms based on dislocation ledges and to quantify interphase boundary motion.