铸造2012，Vol.61Issue(7)：722-726,5.
纳米SiC颗粒增强镁基复合材料的动态断裂行为研究
Study on Behavior of Dynamic Fracture in SiC Nanoparticles Reinforced Magnesium Matrix Composites
刘世英 1李文珍 2何广进2
作者信息
- 1. 北京航空材料研究院,北京100095
- 2. 清华大学机械工程系先进成形制造教育部重点实验室,北京100084
- 折叠
摘要
Abstract
Magnesium matrix nanocomposite reinforced with nano-sized SiC particles was fabricated by mechanical stirring and high intensity ultrasonic dispersion processing (n-SiCp/AZ91D).The fracture behavior of n-SiCp/AZ91D composite has been observed by SEM in-situ tensile test.It is found that the crack initiation appeares in β-Mg17Al12 of the grain boundary initially.The main crack propagates along the fracture of brittle phase.Due to the cohesion of the matrix-particle interface is strong and the propagating cracks are impeded, the main crack propagation path is long.The crack of AZ91D matrix is formed by brittle phase cracking and then propagation along grain boundary.But crack propagation path is rather flat.There were lots of crack appeared during the initiation of loading.关键词
镁基纳米复合材料/颗粒增强/原位拉伸/动态断裂机制Key words
magnesium matrix nanocomposite/ particle reinforcement/ in-situ tensile/ mechanism of dynamic fracture分类
通用工业技术引用本文复制引用
刘世英,李文珍,何广进..纳米SiC颗粒增强镁基复合材料的动态断裂行为研究[J].铸造,2012,61(7):722-726,5.
