高能超声处理对原位Al_3Ti/A356复合材料显微组织和力学性能的影响  

Effects of high intensity ultrasonic processing on microstructure and mechanical properties of in-situ Al_3Ti/A356 composites

作　　者：徐勇华[1] 陈刚[1] 裘晨[1] 赵玉涛[1] 侯文胜[1] 余莹[1] 

机构地区：[1]江苏大学材料科学与工程学院,江苏镇江212013

出　　处：《功能材料》2013年第11期1663-1666,共4页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(50971066;51174098);江苏省科技支撑资助项目(BE2012135);江苏省高校科研成果产业化推进工程资助项目(JH09-37);江苏省高校自然科学研究重大资助项目(10KJA430008)

摘　　要：采用熔体直接反应法,以工业钛剂和A356合金为反应物,利用高能超声原位合成了Al3Ti/A356复合材料。利用X射线衍射与扫描电镜对该复合材料的微观组织和物相组成进行分析,并通过拉伸实验对该复合材料的力学性能进行测试。结果表明,经过高能超声处理后,复合材料中的Al3Ti颗粒尺寸较高能超声处理前明显变小,分布也更均匀。当超声功率为1.2kW/cm2,超声作用时间为360s时,颗粒尺寸最小,为0.5～2μm。复合材料的抗拉强度、屈服强度和伸长率分别达到281.83、226.72MPa和5.6%,较未施加高能超声的复合材料分别提高了16.2%、10.3%和33.3%。The In-situ Al3Ti /A356 composites were synthesized by melt direct reaction method under high intensity ultrasonic field in A356-Ti system.The phase content and microstructure of composites were investigated by SEM and XRD,and the fracture behavior was studied by tensile observation.The results indicated that the size of Al3Ti particles of composites had become smaller and the distribution had been improved after high intensity ultrasonic treatment.When the ultrasonic power was up to 1.2kW/cm2 and the ultrasonic treating time was 360s,the smallest size of Al3Ti particles was obtained.The size was in the range of 0.5-2μm.The tensile strength,yield strength and the elongation of the composites achieved 281.83,227.72MPa and 5.6%,which were 16.2%,10.3% and 33.3% higher than those without ultrasonic assistance,respectively.

关 键 词：铝基复合材料 AL3TI 高能超声 显微组织 力学性能 

分 类 号：TB331[一般工业技术—材料科学与工程]