单/双尺寸SiCp对AZ91D镁合金组织和性能的影响
Effects of Single/Double Size SiCp on Microstructure and Properties of AZ91D Alloy
马振星 1游志勇 1蒋傲雪 1于杰 1王彬1
作者信息
- 1. 太原理工大学材料科学与工程学院,太原 030024
- 折叠
摘要
以AZ91D镁合金和平均颗粒尺寸为10 μm和10 nm的SiC颗粒分别作为基体和增强相,通过半固态机械搅拌法制备出单、双尺寸SiC颗粒增强镁基复合材料.结果显示,SiCp 体积分数为2%的10 nm SiCp/AZ91D复合材料的抗拉强度达到198 MPa,提升了34.7%,屈服强度达到113 MPa,提升了46.7%,伸长率达到6.4%,这主要由于纳米SiC颗粒的晶粒细化作用.断裂机制表明,SiCp/AZ91D复合材料裂纹主要沿微米SiCp-AZ91D的界面扩展.
Abstract
Taking AZ91D magnesium alloy as matrix and SiC particles with an average particle size of 10 μm and 10 nm as reinforcing phases,single-and double-size SiC particle-reinforced magnesium matrix composites were pre-pared by semi-solid state mechanical stirring method.The results reveal that the 2%SiCp/AZ91D composites with particle size of 10 nm achieve a tensile strength of 198 MPa and yield strength of 113 MPa,which is increased by 34.7%and 46.7%,respectively,and elongation reaches 6.4%,which is mainly attributed to the grain refinement effect of nano SiC particles.The fracture mechanism indicates that the cracks in the SiCp/AZ91D composite mainly propa-gate along the interface of micron SiCp-AZ91D.
关键词
SiC/AZ91D镁合金/微观组织/力学性能/断裂机制Key words
SiCp/AZ91D Magnesium Alloy/Microstructure/Mechanical Properties/Fracture Mechanism引用本文复制引用
出版年
2024
NETL
NSTL
万方数据