TiB_(2)颗粒增强6061铝合金的组织及力学性能  

Microstructure and Mechanical Properties of TiB_(2) Particles Reinforced 6061 Aluminum Alloy

作　　者：郝志飞 刘志伟[1] 解佩佩 余申卫 何源 董其娟 魏作山 李政霖 尚金翅 HAO Zhifei;LIU Zhiwei;XIE Peipei;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,China;CSSC No.12 Research Institute,Xingping 713102,China;Binzhou Institute of Technology,Shandong Key Laboratory of Advanced Aluminium Materials and Technology,Binzhou 256606,China;Shandong Jinma Automotive Equipment Technology Co.,Ltd,Linyi 276000,China)

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,陕西西安710049 [2]中国船舶集团有限公司第十二研究所,陕西兴平713102 [3]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,山东滨州256606 [4]山东金马汽车装备科技有限公司,山东临沂276000

出　　处：《热加工工艺》2024年第5期136-141,146,共7页Hot Working Technology

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

摘　　要：TiB_(2)颗粒对铝合金有良好的强化作用。通过超声辅助重熔稀释法制备TiB_(2)/6061复合材料,研究了TiB_(2)颗粒对铸态及挤压T6热处理态6061铝合金的微观组织及力学性能的影响。研究结果表明:添加2wt%TiB2颗粒后,铸态平均晶粒尺寸从未添加TiB_(2)的355.7μm细化至117.5μm;TiB_(2)颗粒可以促进再结晶过程中的形核,并抑制晶粒长大;挤压热处理态TiB_(2)/6061复合材料的屈服强度为330 MPa、抗拉强度为385 MPa,相比未添加TiB_(2)的合金分别提高了11.8%和7.0%,其主要强化方式为热错配强化和Orowan强化。TiB_(2) particles have a good strengthening effect on aluminum alloys.TiB_(2)/6061 composites were prepared by ultrasound-assisted remelting and dilution method,and the effects of TiB_(2) particles on the microstructure and mechanical properties of 6061 aluminum alloy in as-cast and extruded+T6 heat-treated states were investigated.The results show that after adding 2wt%TiB_(2) particles,the average grain size of the as-cast aluminum alloy is refined from 355.7μm without adding TiB_(2) to 117.5μm.TiB_(2) particles can promote nucleation and inhibit grain growth in recrystallization process.The yield strength of the extruded+T6 heat-treated TiB_(2)/6061 composites is 330 MPa,and the ultimate tensile strength is 385 MPa,which increases by 11.8%and 7%compared with that of the alloy without TiB_(2) addition,respectively.The main types of reinforcement are thermal mismatch reinforcement and Orowan reinforcement.

关 键 词：TiB_(2)颗粒增强铝基复合材料 6061铝合金 热挤压 热处理 

分 类 号：TG146.21[一般工业技术—材料科学与工程] TB333.12[金属学及工艺—金属材料]