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材料导报  2026, Vol. 40 Issue (1): 24070164-7    https://doi.org/10.11896/cldb.24070164
  金属与金属基复合材料 |
Ce对原位自生TiB2/6061复合材料显微组织及力学性能的影响
贾婧, 庄伟彬*, 李菁辉, 曹庆, 刘敬福
辽宁工程技术大学材料科学与工程学院,辽宁 阜新 123000
Effect of Ce on Microstructure and Tensile Properties of In-situ Synthesized TiB2/6061 Composites
JIA Jing, ZHUANG Weibin*, LI Jinghui, CAO Qing, LIU Jingfu
School of Materials Science and Engineering, Liaoning Technical University, Fuxin 123000, Liaoning, China
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摘要 采用Al-K2TiF6-KBF4体系,制备了原位自生3% TiB2/6061复合材料和0.3%Ce-3% TiB2/6061(质量分数,下同)复合材料。采用SEM和TEM对复合材料显微组织进行观察,通过室温拉伸对复合材料进行力学性能测试,研究了Ce对原位自生TiB2/6061复合材料显微组织及力学性能的影响。显微组织观察发现,TiB2颗粒与6061基体间界面干净,结合稳定。Ce通过在不同晶面的吸附,改变了TiB2颗粒的最终形貌,在颗粒表面出现倒角平台和圆弧角。Ce的加入缓解了颗粒团聚,团聚体的尺寸下降了38.68%,减小了复合材料基体晶粒尺寸,平均基体晶粒尺寸减小了56.50%。力学性能测试结果表明,3% TiB2/6061复合材料的力学性能因0.3%Ce的加入得到明显提高,屈服强度提升了66.71%,抗拉强度提升了35.22%,伸长率提升了17.59%。经分析,在复合材料内部主要存在细晶强化、Orowan强化和热失配强化三种强化机制。
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贾婧
庄伟彬
李菁辉
曹庆
刘敬福
关键词:  原位自生  TiB2/6061复合材料  Ce  显微组织  力学性能    
Abstract: In-situ synthesized 3% TiB2/6061 composites and 0.3% Ce-3% TiB2/6061 composites were fabricated by Al-K2TiF6-KBF4 system. The microstructure of the composites was observed with SEM and TEM, and the mechanical properties of the composites were tested by room temperature tensile testing. The effect of Ce on the microstructure and tensile properties of in-situ synthesized TiB2/6061 composites was studied. Microstructure observation reveals that the interface between TiB2 particles and 6061 matrix is clean and the interfacial bonding is stable. Ce effected the final morphology of TiB2 particles by adsorbing on different crystal planes, chamfering planes and arc corners appeared on the surface of TiB2 particles. The addition of Ce alleviated particle agglomeration, the size of particle agglomeration decreased by 38.68% and the grain size of the composites decreased, with an average grain size decreased by 56.50%. The tensile test shows that the tensile properties of the 3% TiB2/6061 composites are significantly improved by the addition of Ce, with YS increased by 66.71%, UTS increased by 35.22%, and EL increased by 17.59%. There are three main strengthening mechanisms in the composites: fine-grain strengthening, Orowan strengthening, and thermal expansion strengthening.
Key words:  In-situ synthesized    TiB2/6061 composites    Ce    microstructure    tensile property
出版日期:  2026-01-10      发布日期:  2026-01-09
ZTFLH:  TB331  
基金资助: 辽宁省自然基金联合基金计划项目(20240310);辽宁省高校基本科研项目(LJ212510147026)
通讯作者:  * 庄伟彬,辽宁工程技术大学材料科学与工程学院副教授、硕士研究生导师。主要研究金属基复合材料的制备与性能。近年来发表相关学术论文30余篇,获批国家发明专利7项。wbzhuanglntu@163.com   
作者简介:  贾婧,辽宁工程技术大学材料科学与工程学院硕士研究生,在刘敬福教授和庄伟彬副教授的指导下进行研究。目前主要研究领域为原位合成颗粒增强铝基复合材料的制备与性能研究。
引用本文:    
贾婧, 庄伟彬, 李菁辉, 曹庆, 刘敬福. Ce对原位自生TiB2/6061复合材料显微组织及力学性能的影响[J]. 材料导报, 2026, 40(1): 24070164-7.
JIA Jing, ZHUANG Weibin, LI Jinghui, CAO Qing, LIU Jingfu. Effect of Ce on Microstructure and Tensile Properties of In-situ Synthesized TiB2/6061 Composites. Materials Reports, 2026, 40(1): 24070164-7.
链接本文:  
https://www.mater-rep.com/CN/10.11896/cldb.24070164  或          https://www.mater-rep.com/CN/Y2026/V40/I1/24070164
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