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材料导报  2021, Vol. 35 Issue (16): 16081-16085    https://doi.org/10.11896/cldb.20120261
  金属与金属基复合材料 |
通孔构型Ti6Al4V/Ti2AlC-TiAl基叠层复合板材的组织和性能
刘洁, 艾桃桃, 李文虎, 寇领江, 包维维, 董洪峰, 李梅
陕西理工大学材料科学与工程学院,汉中 723000
Microstructure and Properties of Ti6Al4V/Ti2AlC-TiAl Based Laminated Composite Sheet with Through-hole Structure Design
LIU Jie, AI Taotao, LI Wenhu, KOU Lingjiang, BAO Weiwei, DONG Hongfeng, LI Mei
School of Materials Science and Engineering, Shaanxi University of Technology, Hanzhong 723000, China
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摘要 将Ti-Al-TiC混合粉末和通孔构型TC4钛合金箔(Ti6Al4V)依次叠放装入模具,采用放电等离子烧结技术(SPS)制备了珍珠层结构Ti6Al4V/Ti2AlC-TiAl基叠层复合板材。采用XRD、SEM、EBSD等测试手段分析相组成及微观结构,测试其室温力学性能,研究其强韧化及断裂机理。结果表明,Ti2AlC理论生成量为10%(质量分数)时,复合板材在垂直于叠层方向弯曲强度和断裂韧性达到最大值,分别为645.77 MPa和25.06 MPa·m1/2。通孔构型TC4钛合金强韧层设计改变了裂纹扩展路径,使裂纹扩展驱动力不断被削弱,同时第二相Ti2AlC对裂纹扩展也产生阻碍作用,从而提高了TiAl基叠层复合板材的综合力学性能。
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刘洁
艾桃桃
李文虎
寇领江
包维维
董洪峰
李梅
关键词:  通孔结构  TC4钛合金  叠层复合板材  力学性能    
Abstract: Inspired by nature, Ti6Al4V/Ti2AlC-TiAl based laminated composite sheets with nacre structure were prepared by spark plasma sintering (SPS) overlaying Ti-Al-TiC mixed powders and TC4 titanium alloy foils (Ti6Al4V) with through-holes each other, and the phase composition and microstructure were analyzed by XRD, SEM, EBSD, and the room temperature mechanical properties were measured. The strengthening-toughening mechanism and fracture mechanism were investigated. The results showed that when the theoretical content of Ti2AlC was 10wt%, the flexural strength and fracture toughness of the composite sheet in the direction perpendicular to the laminate reached the maximum values, which were 645.77 MPa and 25.06 MPa·m1/2, respectively. The structured design of the TC4 titanium alloy layers with through-holes changed the crack propagation path, resulting in the driving force of crack propagation was constantly weakened. At the same time, the formation of Ti2AlC phases also had impact on the crack propagation, and improving the comprehensive mechanical properties of TiAl-based laminated composite sheets.
Key words:  through-hole structure    TC4 titanium alloy    laminated composite sheet    mechanical properties
                    发布日期:  2021-09-07
ZTFLH:  TB331  
基金资助: 国家自然科学基金面上项目(51671116);陕西理工大学人才项目(SLGQD1801)
通讯作者:  aitaotao0116@126.com   
作者简介:  刘洁,2014年9月—2018年6月,毕业于榆林学院,获得机械制造设计及其自动化工学学士学位。于2018年9月至今在陕西理工大学攻读硕士,研究方向为材料成形工艺过程及控制。
艾桃桃,陕西理工大学教授,博士,研究生导师。2004年本科毕业于陕西科技大学;2007年硕士研究生毕业于陕西科技大学,2007年至今在陕西理工大学工作;2015年博士研究生毕业于陕西科技大学。其团队主要研究方向包括:金属强韧化技术、高熵合金、新能源及环境技术。负责完成科研项目20余项,包括国家自然科学基金项目。获厅局级以上科技奖励20余项。发表学术论文160余篇,授权专利30余项。已培养硕士研究生10余名。
引用本文:    
刘洁, 艾桃桃, 李文虎, 寇领江, 包维维, 董洪峰, 李梅. 通孔构型Ti6Al4V/Ti2AlC-TiAl基叠层复合板材的组织和性能[J]. 材料导报, 2021, 35(16): 16081-16085.
LIU Jie, AI Taotao, LI Wenhu, KOU Lingjiang, BAO Weiwei, DONG Hongfeng, LI Mei. Microstructure and Properties of Ti6Al4V/Ti2AlC-TiAl Based Laminated Composite Sheet with Through-hole Structure Design. Materials Reports, 2021, 35(16): 16081-16085.
链接本文:  
http://www.mater-rep.com/CN/10.11896/cldb.20120261  或          http://www.mater-rep.com/CN/Y2021/V35/I16/16081
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