TiB_(2)颗粒增强A356复合材料的组织及力学性能研究  

Microstructure and Mechanical Properties of TiB_(2)Particle Reinforced A356 Composites

作　　者：李亚龙 刘志伟[1] 董志武 余申卫 何源 董其娟 魏作山 李政霖 尚金翅 LI Yalong;LIU Zhiwei;DONG Zhiwu;YU Shenwei;HE Yuan;DONG Qijuan;WEI Zuoshan;LI Zhenglin;SHANG Jinchi(State Key Laboratory for Mechanical Behavior of Materials,School of Materials Science and Engineering,Xi'an Jiaotong University,Xi'an 710049;Changchun Aerospace Composite Materials Co.,Ltd.,Changchun 130000;CSSC No.12 Research Instiute,Xingping 713102;Shandong Key Laboratory of Advanced Alu-minium Materials and Technology,Binzhou Weiqiao National Science Advanced Technology Institute,Binzhou 256606;Shandong Jinma Automotive Equipment Technology Co.,Ltd.,Linyi 276000)

机构地区：[1]西安交通大学材料科学与工程学院,金属材料强度全国重点实验室,西安710049 [2]长春长光宇航复合材料有限公司,长春130000 [3]中国船舶集团公司第十二研究所,兴平713102 [4]山东省先进铝基材料与技术重点实验室,滨州魏桥国科高等技术研究院,滨州256606 [5]山东金马汽车装备科技有限公司,临沂276000

出　　处：《特种铸造及有色合金》2024年第10期1326-1332,共7页Special Casting & Nonferrous Alloys

基　　金：国家自然科学基金资助项目(51974224,51604211);教育部产学研合作协同育人资助项目(220406429275922);临沂市“揭榜制”“组阁制”资助项目(2021JB003)。

摘　　要：采用超声辅助熔盐反应法制备Al-10TiB_(2)中间合金,以此为母材通过超声辅助重熔稀释法制备出组织均匀且具有较高强度的5%TiB_(2)/A356复合材料,并对其微观组织和力学性能进行研究。结果表明,复合材料组织均匀且无杂质盐残留。加入5%的TiB_(2)颗粒能够细化晶粒,α-Al平均晶粒尺寸从250μm细化为190μm,降低了24%。铸态复合材料的屈服强度和抗拉强度分别为124 MPa和175 MPa,相比于A356基体提高了12.7%和6.1%。热处理态复合材料的屈服强度和抗拉强度分别为250 MPa和290 MPa,相比于A356基体提高了19.0%和13.7%。Al-10TiB_(2)intermediate alloy was prepared by ultrasonic assisted molten salt reaction method,and 5%TiB_(2)/A356 composite with homogeneous microstructure and high strength was fabricated via ultrasound assisted remelting and dilution approach.The microstructure and mechanical properties of the composites were investigated.The results indicate that the microstructure is homogeneous without residual impurity salt.The size ofα-Al grains is decreased from 250μm to 190μm,which is reduced by 24%,after adding 5%TiB_(2)particles.Moreover,the yield strength and tensile strength of as-cast composites are 124 MPa and 175 MPa,which is enhanced by 12.7%and 6.1%,respec⁃tively,in comparison with those of A356 alloy.The yield strength and tensile strength of heat-treated composites are 250 MPa and 290 MPa,which is enhanced by 19.0%and 13.7%,respectively,in comparison with those of A356 alloy.

关 键 词：TiB_(2)/A356复合材料 超声 重熔稀释 微观组织 力学性能 

分 类 号：TB331[一般工业技术—材料科学与工程] TG146.21[金属学及工艺—金属材料]