States of Aggregation - Clustering, Segregation, Nucleation and Nanostructure

聚集状态 - 聚集、偏析、成核和纳米结构

• 批准号: DP0346745
• 负责人: Prof Barrington Muddle
• 金额: $ 21.58万
• 依托单位: Monash University
• 依托单位国家: 澳大利亚
• 项目类别: Discovery Projects
• 财政年份: 2003
• 资助国家: 澳大利亚
• 起止时间: 2003-01-01 至 2006-12-31
• 项目状态: 已结题
• 来源: https://dataportal.arc.gov.au/RGS/Web/Grants/DP0346745
• 关键词: States; Aggregation; Clustering; Segregation; Nucleation

High strength light alloys are nanostructured materials, deriving their mechanical properties from nanoscale dispersions of strengthening precipitate phases controlled by alloy composition and thermomechanical processing. Atom-probe field-ion microscopy and high-resolution electron microscopy will be combined to study the aggregation of solute atoms that precedes formation of the precipitate phases. Experimental studies at high spatial resolution will be complemented by elastic strain energy calculations and first-principles modelling of the aggregation behaviour, to define its role in controlling precipitation processes and thus properties. The work will provide a basis for improved alloy design and a platform for computer-aided design of high-performance alloys.

高强度轻合金是纳米结构材料，其机械性能来自于由合金成分和热机械加工控制的强化沉淀相的纳米级分散。 原子探针场离子显微镜和高分辨率电子显微镜将结合起来研究沉淀相形成之前的溶质原子的聚集。 高空间分辨率的实验研究将辅之以弹性应变能计算和聚集行为的第一性原理建模，以确定其在控制沉淀过程和性质方面的作用。 这项工作将为改进合金设计提供基础，并为高性能合金的计算机辅助设计提供平台。