Interactions between Lattice Defects and Nanoscale Solute Aggregates: Strengthening and Creep Mechanisms in Magnesium Alloys

晶格缺陷与纳米级溶质聚集体的相互作用：镁合金的强化和蠕变机制。近年来，制造和加工技术的进步重新引起了人们对高温(100-200℃)镁合金的兴趣。要提高现有合金的强度和蠕变抗力，以及开发新的合金，需要更好地了解强化和蠕变机制及其与合金变形行为的关系。在这个项目中，将使用先进的电子显微镜和三维原子探针场离子显微镜成像技术，结合拉伸和蠕变实验，研究晶格缺陷与纳米级溶质聚集体之间的相互作用及其对镁合金高温变形行为的定量影响。本项目的目的是为设计强度和抗蠕变性能更好的镁合金提供可靠的理论依据。

Interactions between Lattice Defects and Nanoscale Solute Aggregates: Strengthening and Creep Mechanisms in Magnesium Alloys. Advances in manufacturing and processing technologies in recent years have brought renewed interests in magnesium alloys for applications at elevated temperatures (100-200°C). Improvement in strength and creep resistance of existing alloys and development of new alloys require better understanding of strengthening and creep mechanisms and their correlations with deformation behaviour of the alloys. In this project, advanced imaging techniques of transmission electron microscopy and three-dimensional atom probe field-ion microscopy, combined with tensile and creep tests, will be used to study interactions between lattice defects and nanoscale solute aggregates and their quantitative effects on deformation behaviour of magnesium alloys at elevated temperatures. The aim of this project is to develop a robust theory for the design of magnesium alloys with improved strength and creep resistance.