Mechanical Properties of Laminated Copper-Based Composites Produced by Electrodeposition Techniques

这个项目解决了两个新兴的科学兴趣：亚微米到纳米尺度范围内的相间距复合材料的非凡强度和通过电铸的金属复合材料的近净形状制造。目的是利用电沉积作为一种技术来生产超细的铜镍和铜银层状复合材料，并对这些材料的微观结构和力学性能关系进行机械理解。该研究旨在了解层压间距OsO测量的微观组织细度对晶粒尺寸OdO、织构和界面结构对屈服、应变硬化和断裂行为的影响。选择Cu-Ni和Cu-Ag体系可以研究晶格错配和层错能对纳米多层结构界面结构和力学性能的影响。广泛的微观结构和力学表征结果将被分析并用于开发超细多层复合材料的变形和断裂机理模型。这项研究扩展了对超细层压复合材料的变形和断裂机制的理解。* * *

9527624 Ebrahimi This project addresses two emerging scientific interests: the extraordinary strength of composites with interphase spacing in the submicron to nanoscale range and near-net- shape manufacturing of metal composites by electroforming. The objective is to utilize electrodeposition as a technique to produce ultra-fine laminated composites of copper-nickel and copper-silver, and to develop a mechanistic understanding of microstructure and mechanical property relationships in these materials. The study aims at understanding the effects of fineness of microstructure measured by laminate spacing OsO to grain size OdO, texture, and interfacial structure on yielding, strain hardening, and fracture behavior. The choice of the Cu-Ni and Cu-Ag systems allows investigation of the effects of lattice mismatch and stacking fault energy on the interfacial structure and mechanical properties of nanostructured multilayers. Results of extensive microstructural and mechanical characterization will be analyzed and used to develop mechanistic models for deformation and fracture of ultra-fine multilayered composites. %%% This study extends understanding of deformation and fracture mechanisms in ultra-fine, laminated composites. ***