韩宝帅,徐严谨,万雄,荆涛,侯红亮,马晓光,裴葆青.基于仿生结构的Al-Ti-Ti2AlNb层状复合材料的组织与力学性能[J].稀有金属材料与工程,2020,49(6):2083~2088.[Han Baoshuai,Xu Yan-jin,Wan Xiong,Jing Tao,Hou Hongliang,Ma Xiaoguang,Pei Baoqing.Microstructure and Mechanical Properties of Al-Ti-Ti2AlNb Laminated Composites Based on Biomimetic Structure[J].Rare Metal Materials and Engineering,2020,49(6):2083~2088.]
基于仿生结构的Al-Ti-Ti2AlNb层状复合材料的组织与力学性能
投稿时间:2019-04-30  修订日期:2019-08-17
中文关键词:  层级结构  反映截面  原位弯曲  抗压性能  强化机理
基金项目:国防基础科研计划资助(项目号JCKY2017205B032),国防科技创新特区项目.
中文摘要:
      受生物材料的韧脆复合结构的启发,本文将Al箔、Ti箔和Ti2AlNb箔材堆叠排列,采真空热压烧结技术制备了层级结构的Al-Ti-Ti2AlNb层状复合材料。利用SEM、XRD等技术表征了材料的微观结构,并测试了抗弯与抗压性能。研究发现,本文设计的层状结构复合了Ti、TiAl系列间化合物、Ti2AlNb等多种材料,层级结构明显,界面清晰。抗弯强度与抗压强度分别为1231±71MPa和1341±63MPa,相比同类材料具有显著的优势。分析认为,多层级结构的存在对裂纹的扩展有显著地阻碍作用;相比常规的二元TiAl层状材料,Ti2AlNb层的存在显著提高了力学性能。
Microstructure and Mechanical Properties of Al-Ti-Ti2AlNb Laminated Composites Based on Biomimetic Structure
英文关键词:laminated structure  interface structure  in-situ bending  compressive strength  strengthening mechanism
英文摘要:
      Based on the ductile-brittle composite principle of biomaterials , Al foils, Ti foils and Ti2AlNb foils were stacked in a certain order in this work, and Al-Ti-Ti2AlNb laminated composites were prepared by vacuum hot pressing sintering. The microstructure was analyzed by means of SEM and XRD, and the flexural and compressive properties were also analyzed. It is found that the laminated composites were composed of Ti, a series of TiAl compounds and Ti2AlNb combined with obvious hierarchical structure and clear interface. The flexural strength and compressive strength are 1231±71 MPa and 1341±63 MPa, respectively, which have significant advantages over similar materials. The analysis shows that the existence of laminated structures plays an important role in optimizing the mechanical properties. Compared with the conventional binary TiAl layered materials, the existence of Ti2AlNb layers significantly improves the mechanical properties.
作者单位E-mail
韩宝帅 中国航空制造技术研究院 北京 清华大学 北京 hbshit@126.com 
徐严谨 中国航空制造技术研究院 北京 清华大学 北京  
万雄 清华大学  
荆涛 清华大学  
侯红亮 中国航空制造技术研究院  
马晓光 中国航空制造技术研究院  
裴葆青 北京航空航天大学  
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