卢毅晨,孙中刚,郭艳华,唱丽丽,申赛刚,邢飞.激光选区熔化TC4钛合金点阵结构压缩性能研究[J].稀有金属材料与工程,2020,49(6):2067~2075.[Lu Yichen,Sun Zhonggang,Guo Yanhua,Chang Lili,Shen Saigang,Xing Fei.Compression Performance of TC4 Titanium Alloy Lattice Structures Manufactured by Selective Laser Melting[J].Rare Metal Materials and Engineering,2020,49(6):2067~2075.]
激光选区熔化TC4钛合金点阵结构压缩性能研究
投稿时间:2019-04-25  修订日期:2019-05-28
中文关键词:  点阵结构材料  激光选区熔化  TC4钛合金  压缩性能
基金项目:国家自然科学基金No. 51875274 赞助
中文摘要:
      通过增材制造成型复杂晶格结构,实现航空航天结构件的轻量化设计得到越来越多的应用,然而点阵结构设计及其性能评价仍欠缺。本研究采用金刚石结构为基体,以点阵密度、结构形式为目标,设计不同几何参数试样,并以TC4钛合金为对象进行成型。对成型试样进行压缩试验,研究这种结构不同尺寸试样压缩性能的差异,结果表明:金刚石点阵结构试样受到载荷后应力在连接节点位置集中,产生断裂。提高晶胞密度可以缓解应力集中现象,提高比强度,减少晶胞尺寸和添加外壳都可以使应力均匀化,提高性能稳定性。小晶胞尺寸试样对球化现象、孔隙等冶金缺陷较为敏感,造成强度的下降。
Compression Performance of TC4 Titanium Alloy Lattice Structures Manufactured by Selective Laser Melting
英文关键词:Lattice structural materials  Selective Laser Melting  TC4 titanium alloy  Compression performance
英文摘要:
      More and more applications have been made to realize lightweight design of aerospace parts by additive manufacturing to form complex lattice structures. However, the lattice structure design and its performance evaluation are still lacking. In this study, the diamond structure was used as the matrix, and the specimens with different geometric parameters were designed for forming with TC4 titanium alloy, aiming at lattice density and structure form. Compression tests were carried out on the formed specimens to study the differences of compressive properties between specimens of different sizes. The results show that the stress of the diamond lattice structure specimens will concentrate at the joint position and cause fracture after being loaded. Increasing cell density can alleviate the phenomenon of stress concentration, increase specific strength, reduce cell size and add shell can make the stress uniform and improve the stability. Small cell size specimens are more sensitive to metallurgical defects such as spheroidization and pore, resulting in a decrease in strength.
作者单位E-mail
卢毅晨 南京工业大学 先进金属材料研究院 403120730@qq.com 
孙中刚 南京工业大学 先进金属材料研究院  
郭艳华 南京工业大学 先进金属材料研究院  
唱丽丽 南京中科煜宸激光技术有限公司  
申赛刚 南京中科煜宸激光技术有限公司  
邢飞 南京中科煜宸激光技术有限公司  
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