铝基复合材料半固态压缩变形组织演化同步辐射原位CT研究  

Microstructure evolution of Al-matrix composites during semi-solid compressive deformation revealed by synchrotron in situ CT study

作　　者：王玮 郭恩宇 王同敏[1] WANG Wei;GUO En-yu;WANG Tong-min(School of Materials Science and Engineering,Dalian University of Technology,Dalian 116024,Liaoning,China)

机构地区：[1]大连理工大学材料科学与工程学院,辽宁大连116024

出　　处：《材料工程》2021年第4期95-101,共7页Journal of Materials Engineering

基　　金：国家重点研发计划项目(2017YFA0403803);国家自然科学基金项目(51901034,51927801)。

摘　　要：利用原位快速同步辐射计算机断层扫描技术,研究纳米颗粒增强Al-10%(质量分数)Cu复合材料的半固态压缩过程,并利用三维图像定量化分析其半固态压缩变形过程中微观组织结构,特别是微孔的演变过程。结果表明:纳米颗粒增强铝基复合材料在半固态压缩过程中的微孔演变可分为3个主要阶段,即微孔闭合阶段,微孔潜伏阶段和微孔的迅速长大阶段。通过对不同变形阶段微孔分布的定量化数据分析和组织观察,进一步分析纳米陶瓷颗粒增强铝基复材的半固态压缩变形机制。借助同步辐射原位成像技术开展铝基复材受载下的四维(三维+时间)研究,可为探究铝基复合材料的半固态变形行为提供参考。In situ fast synchrotron computed tomography was used to investigate the semi-solid compression of nanoparticle-reinforced Al-10%(mass fraction)Cu composites.The three-dimensional images were used to quantitatively analyze the evolution of microstructure especially the micropores during semi-solid deformation process.The results show that the evolution of voids in nanoparticle-reinforced aluminum matrix composites during semi-solid compression has three main stages,namely the micropore closure stage,incubation stage and rapid growth stage.With the analysis of quantitative data and microstructure observation of void distribution in different deformation stages,semi-solid compressive deformation mechanism of aluminum matrix composites is further analyzed.The four-dimensional(three-dimension+time)study of Al-based composites under load using in situ synchrotron imaging technology provides a reference for exploring the semi-solid deformation behavior of aluminum matrix composites.

关 键 词：半固态压缩 同步辐射 计算机断层扫描 定量化分析 

分 类 号：TG146.2[一般工业技术—材料科学与工程]