TiB_(2)含量对原位自生TiB_(2)/2219铝基复合材料组织与性能的影响  

Effect of TiB_(2) Content on Microstructure and Properties of In-situ TiB_(2)/2219 Aluminum Matrix Composites

作　　者：陈送义[1,2,3] 王邓彪 陈绍煊 陈康华 CHEN Songyi;WANG Dengbiao;CHEN Shaoxuan;CHEN Kanghua(State Key Laboratory of High Performance Complex Manufacturing,Central South University,Changsha 410083,China;Light Alloy Research Institute,Central South University,Changsha 410083,China;Collaborative Innovation Center of Advance Nonferrous Structural Materials and Manufacturing,Central South University,Changsha 410083,China)

机构地区：[1]中南大学高性能复杂制造国家重点实验室,湖南长沙410083 [2]中南大学轻合金研究院,湖南长沙410083 [3]中南大学有色金属先进结构材料与制造协同创新中心,湖南长沙410083

出　　处：《湖南大学学报（自然科学版）》2022年第12期108-114,共7页Journal of Hunan University:Natural Sciences

基　　金：中南大学高性能复杂制造国家重点实验室自主课题项目(ZZYJKT202003);湖南省自然科学基金资助项目(2018JJ3645)。

摘　　要：利用混合盐高温反应法制备了原位自生TiB_(2)/2219铝基复合材料铸锭.通过光学显微镜、扫描电镜、X射线等显微组织表征方法以及弹性模量、室温拉伸和室温摆锤冲击实验等测试手段,研究了TiB_(2)含量对原位自生TiB_(2)/2219铝基复合材料组织和性能的影响.研究表明,当TiB_(2)质量分数由0提高到5%时,TiB_(2)颗粒尺寸和TiB_(2)/2219铝基复合材料铸锭的平均晶粒尺寸逐渐减小,固溶时效态的TiB_(2)/2219铝基复合材料板材的弹性模量和强度显著上升,但延伸率和冲击韧性下降.当质量分数为5%时,TiB_(2)/2219铝基复合材料板材的弹性模量、抗拉强度、屈服强度和延伸率分别达到88.7 GPa、(474.2±2)MPa、(400.6±1)MPa和(4.7±0.1)%.The in-situ TiB_(2)/2219 aluminum matrix composite ingots were prepared by using the hightemperature-mixed molten salt method.The effect of TiB_(2) content on microstructure and properties of in-situ TiB_(2)/2219 aluminum matrix composites is investigated by optical microscopy,scanning electron microscopy,X-Ray dif⁃fraction,combined with elastic modulus,room temperature tensile and Charpy impact test methods.The results showed that the TiB_(2) mass fraction increased from 0 to 5%,and the TiB_(2) particle size and the average grain size of TiB_(2)/2219 aluminum composite ingots decreased.The elastic modulus,tensile strength,and yield strength of TiB_(2)/2219 aluminum matrix composite increased significantly as TiB_(2) content increased,but the ductility and impact toughness decreased.The elastic modulus,tensile strength,yield strength,and ductility of 5%TiB_(2)/2219 aluminum matrix composites plate were 88.7 GPa,(474.2±2)MPa,(400.6±1)MPa and(4.7±0.1)%,respectively.

关 键 词：铝基复合材料 TiB_(2)含量 显微组织 力学性能 

分 类 号：TG146.2[一般工业技术—材料科学与工程]