铸造技术2024，Vol.45Issue(2)：157-162,6.DOI:10.16410/j.issn1000-8365.2024.3183
热挤压和脉冲电流对AZ91镁合金及其复合材料显微组织和力学性能的影响
Effect of Hot Extrusion and Pulse Current on the Microstructure and Mechanical Properties of AZ91 Magnesium Alloy and Its Composites
摘要
Abstract
To investigate the effect of SiCp on the evolution of the microstructure and properties of an AZ91 magnesium alloy during electric pulse treatment(EPT),a SiCp/AZ91 composite was prepared by adding 1%(volume fraction)micron SiCp to an AZ91 magnesium alloy.The microstructure of the AZ91 alloy and SiCp/AZ91 composite was refined by low temperature extrusion and electric pulse treatment.The microstructure evolution was analysed by optical microscope.The mechanical properties of the alloys and composites were tested at room temperature.The results show that the composite with reinforced phase particles has a greater dislocation density and greater deformation storage energy after extrusion compared with AZ91 alloy,thus promoting static recrystallization during electric pulse treatment.The yield strength and tensile strength of the AZ91 alloy and composite after pulse treatment are 320 and 450 MPa,and 380 and 454 MPa,respectively.Due to the stress concentration at the interface between the SiCp and the magnesium matrix,the tensile strength of the composite lightly increases.关键词
镁基复合材料/热挤压/电脉冲处理/静态再结晶/力学性能Key words
magnesium matrix composite/hot extrusion/electrical pulse treatment/static recrystallization/mechanical properties分类
通用工业技术引用本文复制引用
武红飞,胡文鑫,马少博..热挤压和脉冲电流对AZ91镁合金及其复合材料显微组织和力学性能的影响[J].铸造技术,2024,45(2):157-162,6.基金项目
国家重点研发计划(2021YFB3501001) （2021YFB3501001）
白云鄂博稀土资源研究与综合利用全国重点实验室项目(2022Z2439) （2022Z2439）
