标题：Improving the high-temperature ductility of Al composites by tailoring the nanoparticle network
作者：Nie J.; Lu F.; Huang Z.; Ma X.; Zhou H.; Chen C.; Chen X.; Yang H.;等 更多 作者机构：[Nie, J] Nano and Heterogeneous Materials Center, School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing, 更多
通讯作者地址：[Nie, J] Nano and Heterogeneous Materials Center, School of Materials Science and Engineering, Nanjing University of Science and TechnologyChina;
关键词：Al matrix composites; AlN; Ductility; Heat resistance; Tensile strength
摘要：Al-matrix composites with networked ceramic nanoparticles have been reported to possess high thermal stability, but their low ductility at high temperatures limits their wide applications. In this study, rotary swaging (RS) was used to modify the network of AlNp nanoparticles for optimizing the high temperature tensile properties of Al matrix composites. The RS treatment was found to disperse the network structure of AlNp particles to some extent and to refine the grains of Al matrix, which resulted in high strain hardening and strain rate sensitivity. This not only improved the thermal stability but also increased the uniform elongation from 0.99% to 2.1% at 350 °C. This work provides a new pathway for tailoring the nanoparticle architecture to obtain a desirable strength-ductility synergy for metal matrix composites. © 2019 Acta Materialia Inc.